251.

Aniline when diazotised in cold and then treated with dimethyl aniline gives a coloured product. The structure of coloured product would be:

• 

• 

• 

• 

Which ofthe following reactions will not give a primary amine?

• CH₃NC $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

• CH₃CN $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

• CH₃CONH₂ $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

• CH₃CONH₂$\stackrel{{\mathrm{Br}}_2/\mathrm{KOH}}{\to }$

In the given reaction,

$\stackrel{{\mathrm{Br}}_2/\mathrm{Fe}}{\to }$ X $\stackrel{\mathrm{Sn}/\mathrm{HCl}}{\to }$ Y

The products X and Y respectively are:

• o-bromo nitrobenzene and o-bromoaniline

• p-bromo nitrobenzene and p-bromoaniline

• m-bromo nitrobenzene and m-bromoaniline

• m-bromo nitrobenzene and m-bromoaniline

Hexamethylenetetramine is used as

• urinary antiseptic

• antipyretic

• analgesic

• all of these

Arrange the following in the increasing order of their basic strengths :

CH₃NH₂ , (CH₃)₂NH , (CH₃)₃N , NH₃

• NH₃ < (CH₃)₃N < (CH₃)₂NH < CH₃NH₂

• NH₃ < (CH₃)₃N < CH₃NH₂ < (CH₃)₂NH

• (CH₃)₃N < NH₃ < CH₃NH₂ < (CH₃)₂NH

• CH₃NH₂ < (CH₃)₂NH < (CH₃)₃N < NH₃ 

Assertion : Benzene reacts with iodine monochloride in presence of anhyd. AlCl₃ to form iodobenzene.

Reason : Iodine monochloride reacts with anhyd. AlCl₃ to produce I⁺ which attacks the benzene ring.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion.

• If assertion is true but reason is false.

• If both assertion and reason are false.

Which amine amongst the following will answer positively the carbylamine test?

• C₆H₅ - NH - CH₃

• 

• C₆H₅ - NH - C₄H₉

• C₆H₅ - N(C₂H₅)₂

Which inorganic compound on heating changes into organic compound ?

• Ammonium cyanide

• Sodalime

• Potassium cyanide

• Sodamide

The bad odour compound formed by the reaction between chloroform and aniline in the presence of alcoholic KOH :

• acetylene

• nitro benzene

• phenyl isocyanate

• carbylamine

The reaction of a primary amine with chloroform and ethanolic solution of KOH is called

• Hofmann's reaction

• coupling reaction

• carbylamine reaction

• Curtius reaction