CBSE
Multiple Choice QuestionsWhich ofthe following molecules will not show optical activity?
In which of the following preparations of ether, the configuration about chiral centre is not retained?
What is B ?
The function of AlCl3, in Friedel-Craft's reaction is to
absorb HCl
absorb water
produce nucleophile
produce electrophile.
Williamson's synthesis involves :
SN1 mechanism
nucleophilic addition
SN2 mechanism
SE mechanism
Consider the reaction,
The correct explanation is
the product is formed due to nucleophilic substitution
the product is formed according to Saytzeff's rule
conjugated double bond product is formed, due to higher stability because of resonance stabilization
(CH3)3CO- is a better leaving group
In one reaction,
is treated with CH3CN and then hydrolysed. In another reaction 
is treated with ethyl acetate and then hydrolysed.
A and B are
Which ofthe following compounds is not chiral?
1-Chloropentane
2-Chloropentane
1-Chloro-2-methyl pentane
3-Chloro-2-methyl pentane
Which of these compounds is synthesised by chloral?
DDT
BHC
Chloroform
Michlers ketone.
Decreasing order of stability of ions is.
(i) CH3 - H - CH3
(ii) CH3 - H - OCH3
(iii) CH3 - H - COCH3
(i) > (ii) > (iii)
(ii) > (i) > (iii)
(ii) > (iii) > (i)
(iii) > (i) > (ii)
