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20 - Organic Chemistry Questions Answers

Chemistry >> Organic Chemistry >> Aldehydes and Ketones IIT JEE
What products will be formed and why? Why would EtMgBr attack on a particular side of cyclic ester?
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Chemistry >> Organic Chemistry >> General Mechanism in organic compounds IIT JEE

Why does

Zn + HCl reduce aldehydes and ketones to alcohols while

Zn - Hg amalgam + HCl reduce aldehyde and ketones to alkanes

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Chemistry >> Organic Chemistry >> Hydrocarbons IIT JEE

 H₂+ Pd + C  Reagent ... It reduces a C=C to C-C ... Is this addition syn or anti?

Asked By: LUFFY
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It is syn reagent

Chemistry >> Organic Chemistry >> Hydrocarbons IIT JEE
It is m-CPBA
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mCPBA is a good oxidizing agent for alkenes and ketones. Here both are present, in that case mCPBA attacks on alkene. Alkene on OMe side is more reactive. So make epoxide this side. Remember also that stereo nature is not changed in this reaction means cis be cis and trans be trans. 

Chemistry >> Organic Chemistry >> General Mechanism in organic compounds IIT JEE

Is the H on B-carbon sterically hindered ?

Asked By: LUFFY
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Steric hindrance is a relative word, so is compared between two carbons.

Tertiary carbon is always more sterically hindered than primary,

so β carbon is more hindered than α in this compound

Chemistry >> Organic Chemistry >> Nomenclature and isomerism IIT JEE
In 1 and 2 ... are the two isomers geometrical iso or optical iso?
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1. It is cis-trans pair (no chiral carbon atom so no optical isomerism)

2. has chiral carbon atom so case of optical isomerism, mirror images so dextro and laevo

Chemistry >> Organic Chemistry >> Alkyl Halides, Alcohols and ethers IIT JEE

CH3-(CHBr)-CH2-CH3   +  Na  --------> ?

 

 

Asked By: AAYUSH TANEJA
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in presence of ether it is Wurtz reaction and as obvious many products will be formed.

Major product will be CH3-CH2-CH(CH3)-CH(CH3)-CH2-CH3

Chemistry >> Organic Chemistry >> Alkyl Halides, Alcohols and ethers IIT JEE

Arrange The Following in increasing order of reactivity towards nucleophilic substitution and give reason :

CH3F , CH3Cl , CH3Br , CH3I  .

 

Asked By: AAYUSH TANEJA
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Better the leaving group the compound contains, more reactive the compound will be 
towards the nucleophilic sustitution.
Order of decreasing reactivity. 
 
CH3I > CH3Br > CH3Cl > CH3F 
 
Chemistry >> Organic Chemistry >> Alkyl Halides, Alcohols and ethers IIT JEE

Arrange The Following in increasing order of dipole moment and give reason :

Dichloromethane , chloroform , carbon tetrachloride .

Asked By: AAYUSH TANEJA
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Dichloromethane > chloroform > carbon tetrachloride 

Chemistry >> Organic Chemistry >> General Mechanism in organic compounds IIT JEE

HOW TO COMPARE FOR HEAT OF COMBUSTION ? WHAT MOST BE STRATERGY TO DECIDE WHICH COMPOUD HAVE MORE EAT OF COMBUTION

Asked By: SIDDHANT
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For this it is necessary to remember all the bond energies

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