201.

Which of the following is NOT a correct method if the preparation of benzylamine from cyanobenzene ?

• H₂/ Ni

• (i) LiAlH₄

  (ii) H₃O⁺

• (i) SnCl₂ + HCl(gas)

  (ii) NaBH₄

• (i) HCl/H₂O 

  (ii) NaBH₄

The correct statement regarding the basicity of arylamines is

• Arylamines are generally more basic than alkylamines because the nitrogen lone pair electrons are not delocalized by interaction with the aromatic ring pi-electron system

• Arylamines are generally more basic than alkylamines, because of aryl group

• Arylamines are generally more basic than alkylamines because the nitrogen atom in arylamines is sp-hydridized.

• Arylamines are generally more basic than alkylamines because the nitrogen atom in arylamines is sp-hydridized.

In the reaction,


X and Y are

• X=2-butyne; Y= 3-hexyne

• X=2-butyne;Y=2-hexyne

• X=1-butyne ;Y = 2-hexyne

• X=1-butyne ;Y = 2-hexyne

Consider the nitration of benzene using mixed conc. H₂SO₄ and HNO₃. If a large amount of KHSO₄ is added to the mixture, the rate of nitration will be

• slower

• uncharge

• doubled

• doubled

The product formed by the reaction of an aldehyde with a primary amine is

• Ketone

• Carboxylic acid

• Aromatic acid

• Aromatic acid

The electrolytic reduction of nitrobenzene in strongly acidic medium produces

• p-aminophenol

• azoxybenzene

• azobenzene

• aniline

In the following reaction, the product (A) is 

Which of the following will most stable diazonium salt RN₂⁺X^-?

• CH₃N₂⁺X^-

• C₆H₅N₂⁺X^-

• CH₃CH₂N₂⁺X^-

• CH₃CH₂N₂⁺X^-

Nitrobenzene on reaction with conc. HNO₃/H₂SO₄ at 80-100⁰C forms which one of the following products?

• 1,2-dinitrobenzene

• 1,3- dinitrobenzene

• 1,4-dinitrobenzene

• 1,4-dinitrobenzene

Some meta-directing substituents in aromatic substitution are given. Which one is most deactivating?

• -CN

• -SO₃H

• -COOH

• -COOH