Saturday, December 26, 2020
Wednesday, September 23, 2020
Wednesday, September 16, 2020
Tuesday, September 15, 2020
Saturday, August 29, 2020
Tollens' Fehling's and Benedict's Test
Three Visual “Tests” For The Presence of Aldehydes: Benedict’s, Fehlings, and Tollens’ Tests
We’ve seen previously that aldehydes are a functional group that can be oxidized relatively easily to carboxylic acids. For example, oxidation of alcohols with a “strong” oxidant like chromic acid (H2CrO4) results in an aldehyde that is quickly oxidized further to a carboxylic acid.
During this process, the aldehyde is oxidized and the oxidizing agent is reduced. Another way of framing this is to say that the aldehyde is the reducing agent in this process.
Three “visual” tests for aldehydes that you might encounter in an introductory organic chemistry lab are the following:
- Fehling's Solution:- where an aldehyde changes the color of a blue Cu(II) solution to red Cu(I) [as Cu2O].
- Benedict's Solution:- a slightly modified version of Fehling’s solution
- Tollens' Test :- where aldehyde oxidation results in a beautiful “mirror” of silver metal to precipitate on the reaction vessel.
Carbohydrates: Reducing Sugar
What’s a reducing sugar, and why is it important? Here’s a quick summary. Full details in the post below.
Mutarotation
1-Mutarotation Is The Change In Optical Rotation Observed When Pure α- or β- Anomers Are Dissolved In Water (or other solvents)
In our recent post on ring-chain tautomerism, we said that there are two isomers of D-glucose in its 6-membered ring (“pyranose”) form.
These two diastereomers – which, to make matters more confusing, are called “anomers” in the context of sugar chemistry – differ in the orientation of the hydroxyl group on C-1. (Note that C-1 is a hemiacetal. )
- ➡️In the “alpha” (α) anomer, the OH group on C-1 is on the opposite side of the ring as the chain on C-5.
- ➡️In the “beta” (β) anomer, the OH group on C-1 is on the same side of the ring as the C-5 substituent.
Each of these two forms can be synthesized and isolated as pure compounds.
- ●The alpha (α) anomer of D-glucose has a specific rotation of +112 degrees in water.
- ●The beta (β) anomer of D-glucose has a specific rotation of +19 degrees. (18.7 actually, but rounding up to 19).
Here’s the interesting thing. When either anomer is dissolved in water, the value of the specific rotation changes over time, eventually reaching the same value of +52.5°.
- ●The specific rotation of α-D-glucopyranose decreases from +112° to +52.5°.
- ●The specific rotation of β-D-glucopyranose increases from +19° to +52.5°.
This behaviour is called mutarotation (literally, “change in rotation”).
Hold on. Isn’t specific rotation of a molecule supposed to remain the same?
Yes – if it is indeed the same molecule!
And therein lies the answer to the puzzle. For when the solutions whose specific rotations have changed to +52.5° are analyzed, they are found to no longer consist of 100% alpha (α) or 100% beta (β) anomers, but instead a ratio of alpha (α) (36%) and beta (β) (64% ) isomers.
Thursday, August 27, 2020
Wednesday, August 26, 2020
Tuesday, July 21, 2020
Monday, July 20, 2020
Acidity of Aldehydes and Ketones
Acidity of Aldehydes and Ketones
Friday, April 10, 2020
Werner’s Theory of Coordination Compounds
Werner’s Theory of Coordination Compounds
number. Primary valencies are shown by dotted lines while secondary by thick lines.
six secondary valencies and copper2+ four. The total number of secondary valencies required by a metal is more
commonly known as coordination number (C.N).
Thus, the number and arrangement of ligands in space determines the stereochemistry of a complex. Thus,
in case of six secondary valencies the arrangement of secondary valencies may be as directed to the apices of
a regular octahedral while in case of four secondary valencies arrangement might be either a planar or a tetrahedral
manner and thus, this postulate predicted the possibilities of a variety of type of isomerism in coordination compounds.
Remember that primary valencies are non–directional.
Tuesday, April 7, 2020
Reasoning Questions Of Chemistry UPPGT KVS PGT NVS PGT
Reasoning Questions Of Chemistry
2. Aromolic ammines are less basic than aliphanic ammines?
3. Silver chiloride dissolve in methyl ammine solution?
4. Phenol does not undergo protosanon readily?
5. Odichlorobengin has lower boiling point than photochiorobenzin?
6. Ammonolysis of alkyl halide does not give a corresponding ammines in pure state.
7. If NO2 or COOH groups is attached to a carbon of benzin ring electrophilic substitution becomes difficults?
8. Halsalkane undergo nucleophilic substitution reaction?
9. Alchohol act as a weck base?
10. Phenol exibit acidic halver?
11. Ether posses dipolemoment even alkyl groups are identical?
12. Carboxylic acids have high boiling point than alcohols of comparable molecular mass?
13. Aloxhydes are more reactive than ketones towards Nucleophilic reagents?
14. Boiling points of eather are lower than isomeric alcohols?
15. Alkin acid is weaker than chioroacetric acids?
16. During the prepration of ammonia aerrivetives of alaehyse &ketones . pH of the reaction is carefully controlled?
17. Presence of acetic anhydense is necessary in the oxidation of tolvene to benzaldehydrade by chromic oxide?
18. Chloroacetic acids has higher pH value than acidic acid?
19. Electrophilic substitution reaction in benzoic acids takes place at metaposition?
20. Alkyl ammines are stronger base than Aryl ammines?
21. Like ammonia ammines are good nucleophiles?
22. In contrast to arenes aliphatic hydrocarbones do not undergo nitration easily?
23. What for quatornavy ammonium salts are widely used?
24. Tolvene is more readily nitrated than benzene?
25. Haloalkanes are more reactive then haloammines?
26. Unlike alcohols ,phenols cannot be easily protonated?
27. Alkyl nitrite have lower boiling point than the corresponding carboxylic acids?
28. Why do aldehydre/ketone behave like polor compounds?
29. Haloarenes are insoluble in water but soloble in benzene?
30. Formalchyde gives cannbard reaction whereas acitaldehyde not?
31. Carboxylic acid do not give the characteristic test of carboxylic group?
32. Haloalkanes undergo nucleophilic substitution whereas haloammines electrophilic substitution?
Why melting point of P dichlorobenzene is greater than that of Odichlorobenzene?
Addition of KCN solution to carbonyl compounds increases the pH of solution
Sodium Bisulfite is used for the purification of Carbonyl Compounds
Boiling point of aldehydes lie in between parent alkanes and corresponding alcohols
Benzaldehyde gives a positive test with Tollens reagent but not give with Fehling solution or Benedict solution.
Carbonyl compound shows nucleophillic addition reaction.
Monday, April 6, 2020
EQUIVALENT WEIGHT CONCEPTS
EQUIVALENT CONCEPTS
Monday, March 23, 2020
Coronavirus pandemic | IndiGo says some employees being ostracised due to 'line of duty and travel history'
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COVID-19 lockdown: E-biz players flag delivery disruption
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Airtel proposes roaming pact to all telcos to avoid service interruption
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$2 trillion coronavirus aid package stalls in US Senate
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Market Live: SGX Nifty indicates a positive opening for Indian indices
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US Fed aims 'bazooka' to backstop coronavirus-hit economy
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Elite hackers target WHO as coronavirus cyberattacks spike
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Amazon teams up with Bill Gates-backed group to deliver coronavirus test kits
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Toyota, NTT to invest in each other in smart city tie-up: Report
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Market Live: SGX Nifty indicates a positive opening for Indian indices
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Gold rises over 1% as US Fed ramps up support measures
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Cash Market | An intraday short selling trade in Yes Bank
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Stocks in the news: SBI, Sterlite Tech, Dr Reddy's Labs, Usha Martin, GNFC
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Cash Market | A bullish double bottom trade in IOC
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Options Trade | An options trade in Reliance to gain from its negative bias
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What changed for the market while you were sleeping? Top 10 things to know
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Futures Trade | A low-risk short selling opportunity in MGL
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Coronavirus impact | Most temples closed doors for devotees to prevent spread of COVID-19
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Coronavirus News LIVE Updates: Several states in lockdown; Trump says won't allow long-lasting damage to economy
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Coronavirus pandemic | How does COVID-19 compare to other pandemics, outbreaks?
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Sunday, March 22, 2020
Coronavirus positive cases in Maharashtra jump to 89
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Coronavirus outbreak: Anand Mahindra proposes lockdown for few weeks
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General insurers’ incurred claim ratio improves
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Sebi short-selling curbs will act as a speed breaker to the market fall
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Ideas for Profit | Potential COVID-19 treatment can be a shot in the arm for this pharma company
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Reliance Home Finance Limited
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Top buy and sell ideas by Ashwani Gujral, Sudarshan Sukhani, Mitesh Thakkar for short term
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Skype, specialized phones, remote applications: How ‘quarantined’ MF managers sync up for workplace decisions
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Cash Market | A bullish morning star pattern in Jindal Steel
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Futures Trade | A short sell trade in IndiaBulls Housing Finance
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Futures Trade | A bullish breakout trade in Reliance
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Options Trade | An options strategy in HDFC Bank
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Nine stocks listed for F&O ban on March 23; what does SEBI circular mean for markets?
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Singapore Airlines grounds most of its fleet as travel bans bite
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China reports no domestic virus cases as imported infections climb
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Coronavirus pandemic | TVS Motor halts manufacturing for 2 days
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Market Live: SGX Nifty indicates Indian index may open 1,000 pts lower, Asian peers dive
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Gold falls as cash dash overwhelms stimulus measures
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Coronavirus pandemic: Mutual fund operations to be impacted, AMFI writes to SEBI
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Asia shares dive with S&P 500, bond yields fall anew
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Japan says Tokyo Olympics may be postponed due to coronavirus
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Automakers halt production in India due to coronavirus
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Coronavirus pandemic: IOC asks member countries about COVID-19 impact
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Coronavirus pandemic: Spanish athletics join call for Olympic delay
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Coronavirus impact: Aussie batsman, Khawaja urges people to take COVID-19 more seriously
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Saturday, March 21, 2020
Coronavirus Pandemic | GoAir announces 50% salary cut for top management
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IT firms still struggling to allow its employees to work from home
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IPL 2020: KKR skipper takes for shadow practice and meditation in self-isolation courtesy of COVID-19
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Coronavirus: Equity mutual funds give 25% negative returns to investors
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Stay at home and save lives: President Trump
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Corona pandemic I Mumbai health dept asks police to track movements of people who returned from abroad
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COVID-19: China reports first local case after three days, witnesses surge in imported infections
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Indian Cooking Tips: 11 Indian Paneer Gravy Recipes You Can Try At Home
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Coronavirus impact: Tenants occupying co-working spaces ask for flexible terms following pandemic
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COVID-19 deaths surge past 13,000 as one billion confined to homes
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Coronavirus pandemic | Car, bike factories in Pune shut till March 31; Mercedes, Fiat, JCB join the league
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Italy reports almost 800 new virus deaths, new daily record
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First coronavirus case reported in Andhra Pradesh
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Coronavirus cases rise to 315 in India: Health Ministry
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Covid-19: Mumbaikars stay indoors as 'Janata curfew' commences
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Market Week Ahead: 10 key factors that will keep traders busy this week
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Maharashtra govt announces effective shut-down of Mumbai local trains
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Allocate capital in equities which is not required for the next 3 years: Neelesh Surana
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Coronavirus LIVE updates: Stay indoors, stay healthy, says PM Modi as Janata Curfew begins
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Investing in the time of coronavirus: How to play in such markets?
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Friday, March 20, 2020
Coronavirus pandemic | California's Yosemite National Park shuts down over coronavirus fears
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Coronavirus pandemic | US strengthens emergency, relief measures to combat coronavirus threat
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Coronavirus pandemic | Wuhan recovery gives hope to rest of world: WHO
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North Korea fires two 'ballistic missiles' into sea: Seoul
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Coronavirus pandemic | Meghalaya announces 24-hour shutdown on Saturday, CM says it's 'coronavirus awareness day'
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Coronavirus pandemic | US blames China, Russia and Iran for spreading 'disinformation' on coronavirus
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IndiGo, GoAir to curtail flights on March 22 for Janata Curfew
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Coronavirus pandemic | Amid fear of lockdown, people resort to panic buying in various parts of Delhi
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COVID-19: Total 236 coronavirus cases in India, says ICMR
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Netflix creates $100 million fund to help displaced film and TV workers
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Coronavirus pandemic | The United Kingdom is closed: Johnson shutters pubs and restaurants
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Coronavirus pandemic | Member of US Vice President Pence's office tests positive for coronavirus
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Coronavirus pandemic | Winter is coming: Cooler South America weather could fan coronavirus spread
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Be cautious, gold may fall upto $1,400/ounce before bouncing back sharply
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Former Vistara CSCO Sanjiv Kapoor joins GoAir
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What should investors do as markets turn volatile over coronavirus fears
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18% of Nifty50 companies will gain from falling crude prices
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Market awaits relief package, but correction will continue if virus spreads further
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Coronavirus pandemic | How to travel the world when you’re homebound
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'A gig that terrifies you and gives you purpose': What it takes to direct MAMI Mumbai Film Festival
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She’s out to save India's missing girls using art and a digital game
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House Of Celeste's Progressive Take On Indian Classics Will Warm Your Hearts
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'I limit myself to taking only one panga a day' – 'Guilty' director Ruchi Narain on battling everyday sexism
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Thursday, March 19, 2020
Diamonds in the Dust: A sharp correction in ICICI Bank’s shares signals an opportunity
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Godrej Properties announces project in Faridabad, share price up
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ITC stock sees 32% in 2020; brokerages now expect double-digit gains
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Coronavirus pandemic update March 20: Number of global cases crosses 200,000
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Biocon share price rises 3% on EIR from USFDA
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Here’s how option writers got crushed under the market crash
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Equity funds are managing this market fall well
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PM Modi's COVID-19 task force to meet today; direct cash transfer on the cards
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Gold loses its shine as panic sets in, but up move possible on global liquidity
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Rupee opens higher at 74.77 per dollar
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Top buy and sell ideas by Ashwani Gujral, Mitesh Thakkar, Prakash Gaba for short term
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Where could the market mayhem end – Lessons from the 2008-09 financial crisis
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Nokia unveils first 5G smartphone 8.3 5G, check the details
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Coronavirus LIVE updates: China reports no new domestic COVID-19 cases for second day
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In pics | India’s slums can’t afford sanitisers, lack clean water to prevent coronavirus spread
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Coronavirus impact: A summer of woes for luxury hospitality as losses likely to touch Rs 620 crore
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Options Trade | An options strategy to gain from a likely sideways move in SBI
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Cash Market | A possible breakout trade in ITC
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Stocks in the news: SBI, SpiceJet, Strides Pharma, Praj Industries, RITES, Sun Pharma
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Market Live: SGX Nifty indicates a positive opening for Indian indices
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Nirbhaya case: Four rapists hanged till death at Delhi's Tihar jail
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Wednesday, March 18, 2020
Coronavirus Pandemic: ICSE has not postponed class 10, 12 board exams, says official
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Coronavirus pandemic | HCL Noida employee tests positive, co invokes COVID-19 contingency plan
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Canadian plane maker De Havilland sues SpiceJet for Rs 320cr for failing to pay for aircraft order
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These metal stocks are now available at a steep discount to replacement cost
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Coronavirus pandemic | Travel industry down to its knees: 'Not done a single booking in three weeks,' says agent
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Coronavirus pandemic | Western Railway local trains see commuter count drop by 8 lakh
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China reports no new domestic coronavirus cases for first time: NHC
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Why the NAV cut-off time is immaterial for long-term MF investors
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Rupee opens at record low of 74.95 per dollar
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65% flat buyers in MMR defaulting on payments amid coronavirus scare: Report
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Diamonds in the Dust | This CV company’s shares appear deflated, but its potential is intact
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Lok Sabha approves Budget of over Rs 1 lakh cr for J&K for FY21
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Two US Congressmen test positive for coronavirus
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'Chinese virus' term not racist, says Donald Trump
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SAARC nations can together mitigate coronavirus impact: Dharmendra Pradhan
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Coronavirus pandemic | Bill Gates says countries that shut down and do testing could bounce back in weeks
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Options Trade | An options strategy to benefit from the negative bias in Hindalco
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Melania Trump to star in US coronavirus awareness ads
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Cash Market | A bullish hammer pattern in PFC
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Cash Market | A chance to exploit a technical bounce in IndusInd Bank
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Futures Trade | Shallow pull-backs offer fresh short selling opportunity in Titan
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Coronavirus LIVE Updates: PM Modi to address nation today; CBSE postpones class 10, 12 board exams till March 31
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What changed for the market while you were sleeping? Top 10 things to know
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Tuesday, March 17, 2020
Why banning short selling is a bad idea
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Are IT stocks good for bottom fishing?
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Samsung Galaxy M21 India launch at 12 pm: Everything we know so far
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Telecom operators red-flag ‘surveillance’ after govt seeks call data records of all users: Report
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Rupee opens higher at 73.98 per dollar
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Covid-19 pandemic | Lessons from India on how to overcome shortage of medical supplies
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Top buy and sell ideas by Ashwani Gujral, Sudarshan Sukhani, Prakash Gaba for short term
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Coronavirus pandemic update March 17: 8 new countries record first cases
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Coronavirus pandemic | World Bank increases COVID-19 response fund to $14 billion
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NC chief Farooq Abdullah visits detained Mehbooba Mufti's residence in Srinagar
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Options Trade | An option strategy to gain from a bearish stance in UPL
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Futures Trade | A breakdown trade from a trend line in UPL
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Cash Market | A reversal to the mean trade in RBL Bank
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Futures Trade | A high probability short sell in IOC
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Coronavirus pandemic | Will shut trains if people don't stop non-essential travel: Maharashtra CM Uddhav Thackeray
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New iOS 14 code hints Apple will launch two affordable iPhones
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Coronavirus pandemic | Govt should be complimented for its efforts to deal with COVID-19: Karti Chidambaram
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Hot Stocks | Here's why Nestle, Maruti, NTPC are a sell for short term
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Coronavirus pandemic: Kevin Durant among 4 Brooklyn Net players who test positive
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West Bengal reports first positive case of coronavirus
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What changed for the market while you were sleeping? Top 10 things to know
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Europe locks down as WHO calls for 'boldest actions' against pandemic
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EU imposes entry ban for 30 days: Angela Merkel
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Monday, March 16, 2020
Today, we have an investment philosophy and framework in place: Tata MF
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Coronavirus cases in Mumbai Metropolitan Region rise to 14
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Sitaram Yechury pitches for court-monitored independent probe into Delhi's communal violence
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Coronavirus LIVE updates: No entry of passengers from EU countries, UK, Turkey from March 18, says govt
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A holistic and all-out coordinated response to Covid-19 in India is a must
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NMDC slashes iron ore prices by Rs 50 per tonne
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UN Security Council halts meetings due to coronavirus epidemic
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West Bengal to create Rs 200cr fund to tackle coronavirus; theatres, stadiums to remain shut till March 31
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Donald Trump says pandemic could end in US by July
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Jyotiraditya Scindia omitted details of pending cases in Rajya Sabha papers: Congress
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Options Trade | An options strategy to gain from high volatility in Nifty’s weekly contract
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Futures Trade | A short sell trade in Axis Bank following a shallow pullback
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Oil prices jump $1 as recent sharp falls draw investors
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Coronavirus pandemic: New housing launches may slow down by 15% this festive season
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In pics | Coronavirus cases in India cross 100; a look at how the country copes with the pandemic
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IMF chief says over 20 countries seek aid, calls for coordinated spending
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Amazon to hire 100,000 workers as online orders surge on coronavirus worries
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Market LIve: SGX Nifty indicates a positive opening for Indian indices
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Gold extends losses from Monday's meltdown on flight for cash
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Universal Pictures will make movies available at home and in theaters on the same day
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What you need to know about coronavirus today
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Stocks in the news: IOC, Yes Bank, KEC International, Bajaj Finserv, Sadbhav Engg, Grasim
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What changed for the market while you were sleeping? Top 10 things to know
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Sunday, March 15, 2020
Donald Trump congratulates Fed for rates cut, calls action 'terrific'
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When should investors start bottom fishing – What does history suggest?
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Madhya Pradesh BJP legislators return to Bhopal after 5 days in Haryana
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Madhya Pradesh Government Crisis LIVE Updates: Speaker to take a call on floor test, says Kamal Nath
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What do the Fed's latest moves mean for US consumers?
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China logs more coronavirus cases imported from abroad
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CJI rules out complete shutdown of SC amid COVID-19 threat
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Only raising of hands allowed during trust vote: MP governor
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Coronavirus pandemic | US govt official says vaccine trial starts Monday
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Coronavirus pandemic | Nike closes stores in US and some other countries
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Democratic White House contender Joe Biden says he would pick a woman as vice president
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Coronavirus pandemic | Cases rise to 110; Maha overtakes Kerala; Kartarpur Corridor travel suspended as border restrictions come in place
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Market Live: SGX Nifty indicates a negative opening for Indian indices
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Market Live: SGX Nifty indicates a negative opening for Indian indices
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Coronavirus LIVE Updates: Amid crisis, US Fed Reserve cuts key interest rate to near zero
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Futures Trade | A bullish engulfing pattern in PFC
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Options Trade | An options strategy to benefit from the high volatility in Nifty
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Cash Market | A low risk buying opportunity in Tata Steel
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JSW Steel | A bullish engulfing pattern in JSW Steel
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Stocks in the news: Yes Bank, RCF, ICICI Bank, Ind-Swift Lab, HDFC, Escorts
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Fed cuts interest rate to zero, launches $700bn QE programme
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What changed for the market while you were sleeping? Top 15 things to know
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Hot Stocks: Support for Nifty at 9,800; here's why investors can buy HDFC Bank
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Saturday, March 14, 2020
Bollywood faces uphill task in 2020 to match last year’s box office numbers; poor quality of films, coronavirus scare major reasons
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Govt to reclassify ancient monuments; review policy regulating construction around ASI-protected sites
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Coronavirus impact: Doctors warn Serie A players from restarting training, as more COVID-19 cases register in Italy
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Coronavirus: Construction, transport, chemical manufacturing likely to be worst-affected, says report
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Karnataka CM requests techies to work from home; IT firms still exploring options
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Petrol price cut by 12 paise/litre, diesel by 14 paise
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218 Indians stranded in coronavirus-hit Italy arrive in India
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Coronavirus scare: FPIs press panic button, withdraw Rs 37,976 cr from Indian mkts
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Coronavirus impact: Pilgrimage to Kartarpur Sahib suspended
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Explained | Tools to help you while working remotely amid coronavirus outbreak
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How to read the market direction? Remember ‘Chakravyuh’ in Mahabharat
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The good, bad and the ugly of Yes Bank’s Q3 numbers, rescue fine print
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CCI oscillator suggests buying opportunity in Maruti Suzuki
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Avoid catching a falling knife; markets need base formation rather than a pullback
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'With market in mayhem amid coronavirus fears, pick these top 5 stocks for returns up to 34%'
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Coronavirus pandemic | FIIs sell equities worth Rs 41,700cr in 14 straight sessions, DIIs buy Rs 43,600cr
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Coronavirus scare | Principal MF's Rajat Jain lists these 6 safe havens
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Market Week Ahead: 10 key factors that will keep traders busy
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234 Indians stranded in Iran have arrived in India: Jaishankar
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China reports 20 new virus cases, jump in 'imported' infections
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GST Council meet: Finance Ministry to examine possibility of borrowing from market to solve compensation issue
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Madhya Pradesh Governor Lalji Tandon directs CM Kamal Nath to seek trust vote on March 16
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Trump tests negative for coronavirus: White House physician
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Friday, March 13, 2020
Coronavirus Pandemic | All education institutions closed in Pakistan till April 5
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Coronavirus Pandemic | Cabinet approves Odisha Covid-19 Regulations 2020
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Netanyahu requested PM Modi to allow export of masks, pharmaceuticals to Israel: report
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Govt hikes duties on petrol, diesel by Rs 3 each
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Haryana bans public rallies, sporting events to contain coronavirus spread
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Airports body seeks concession fee waiver due to coronavirus impact
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Coronavirus Pandemic | Indian Embassy in US takes measures to address concerns over travel restrictions
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Babri Masjid demolition: CBI court fixes Mar 24 for questioning accused
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Coronavirus: Saudi Arabia extends travel ban to EU, 12 nations including India
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Finding symbol of isotops by proton and neutron
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Reactions of Diazonium Salts: Sandmeyer and Related Reactions by Nand kishor gupta in AMINES , AROMATIC REACTIONS , ORGANIC CHEM...
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Factors That Affect Basicity of Amines by NAND KISHOR GUPTA in AMINES , ORGANIC CHEMISTRY From may recall that any factor ...
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Temperature and Rate – the Relationship By now, we know that temperature influences the rate of a reaction. As the temperature increases...