281.

Decreasing order of stability of ions is.
(i) CH₃ - $\stackrel{+}{\mathrm{C}}$H - CH₃

(ii) CH₃ - $\stackrel{+}{\mathrm{C}}$H - OCH₃

(iii) CH₃ - $\stackrel{+}{\mathrm{C}}$H - COCH₃

• (i) > (ii) > (iii)

• (ii) > (i) > (iii)

• (ii) > (iii) > (i)

• (iii) > (i) > (ii)

Which of these compounds is synthesised by chloral?

• DDT

• BHC

• Chloroform

• Michlers ketone.

What is B ?

The function of AlCl₃, in Friedel-Craft's reaction is to

• absorb HCl

• absorb water

• produce nucleophile

• produce electrophile.

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

Williamson's synthesis involves :

• S_N1 mechanism

• nucleophilic addition

• S_N2 mechanism

• S_E  mechanism

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

In the following sequence of the reactions, identify the final product.

Chloropicrin is used as an insecticide and has been used as tear war gas .The chloropicrin is :

• CH₂ClCCl₃

• CCl₃NO₂

• CH₂(CH₃)CH₂Cl

• CHI₃

The reagent in Friedel-Craft's reaction is :

• pyridine

• RCOCl

• RCOOH

• HCl