16 - Organic Chemistry Questions Answers

Is the H on B-carbon sterically hindered ?

Asked By: LUFFY
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Joshi sir comment

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

In 1 and 2 ... are the two isomers geometrical iso or optical iso?
Asked By: LUFFY
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Joshi sir comment

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

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

 

 

Asked By: AAYUSH TANEJA
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Joshi sir comment

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

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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Joshi sir comment
Better the leaving group the compound contains, more reactive the compound will be 
towards the nucleophilic sustitution.
Order of decreasing reactivity. 
 
CH3I > CH3Br > CH3Cl > CH3
 

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

Dichloromethane , chloroform , carbon tetrachloride .

Asked By: AAYUSH TANEJA
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Joshi sir comment

Dichloromethane > chloroform > carbon tetrachloride 

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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Joshi sir comment

For this it is necessary to remember all the bond energies

can anyone explain to me how to write the structures of some organic compounds like but-2-ol?

Asked By: ANURAG
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Joshi sir comment

name is not correct

IUPAC name has four part

Extra Group................Main Chain............Bond Name..............Main Group

so name may be

*****..........................but........................an...................................2ol

****** means no extra group is present 

Main group is alcohol and its name is ol, 2 for second place in chain

"but" for 4 carbon and "an" for all single bond

so structure will be     CH3CH(OH)CH2CH3

What do you know about boron?And boron nomenclature?

Asked By: MUHAMMAD KHAN
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Joshi sir comment

Boron is  a chemical element produced by cosmic ray spallation. Chemically uncombined Boron which is classified as a metalloid is not found naturally on earth. Several allotropes of Boron exist. Natural Boron is composed of two stable isotopes one of which is Boron 10, used as a neutron capturing agent.

 

How does Fridal craft reaxn can be given by ESTER                        

                              CH3COOCH2CH3

 

PLEASE HELP ME

PLEASE 

Asked By: AMAN
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Joshi sir comment

CH3CO--OC2H5

This is the form of ester. In the presence of anhydrous AlCl3, C6H6 will give reaction with ester 

JEE 2009 (MATRIX MATCH QUES.)

How  reaction takes place between                 

                                  CH3CH2CH2CH2NH2 and CHCl3/alco.KOH     giving foul smell.

PLEASE GUIDE ME.

PLEASE

Asked By: AMAN
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Joshi sir comment

This is well known Reimer Tiemann reaction

Product will be 

 CH3CH2CH2CH2NC

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