271.

Amides are converted to amines by the following reaction :

• Perkin

• Claisen

• Hofmann

• Clemmensen

N₂ gas is liberated when [HCl + NaNO₂] reacts with the following compound :

(A) CH₃CH₂NH₂   (B) Urea

(C) CH₃CONH₂    (D) C₆H₅NH₂

The answer is :

• A , B , C

• A , B , D

• A, C , D

• B , C , D

Acetamide when heated with PCl₅ gives :

• CH₃Cl

• CH₃CN

• CH₃CCl₂NH₂

• CHCl₂CONH₂

Which of the following reactions does not yield an amine?

• R-X + NH₃ $\to$

• R-CH$=$NOH + [H] $\stackrel{{\mathrm{NaC}}_2{\mathrm{H}}_5\mathrm{OH}}{\to }$

• R-CN +H₂O $\stackrel{{\mathrm{H}}^{+}}{\to }$

• R-CONH₂ $\stackrel{{\mathrm{LiAlH}}_4}{\to }$

The chemical name for melamine is

• 1,3,5-Triamino-2,4,6-triazine

• 2,4,6-Triamino-1,3,5-triazine

• 2-Amino-1,3,5-triazine

• 2,4-Diamino-1,3,5-triazine

Bromine is added to cold dilute aqueous solution ofNaOH. The mixture is boiled. Which of the following statements is not true?

• During the reaction bromine is present in four different oxidation states.

• The greatest difference between the various oxidation states of bromine is 5.

• On acidification ofthe final mixture bromine is formed.

• Disproportionation of bromine occurs during the reaction.

RNO₂ is reduced with Sn/HCl .Product formed is :

• RNHOH

• RNH₂

• RNH₃⁺

• R₂NH

The compound which on reaction with aqueous nitrous acid at low temperature produces an oily nitrosoamine is

• methyl amine

• ethyl amine

• diethyl amine

• triethyl amine

Hofmann's bromamide reaction is used to convert :

• acid to alcohol

• alcohol to acid

• amide to amine

• amine to amide

Compound A (molecular formula C₃H₈O) is treated with acidified potassium dichromate to form a product B (molecular formula C₃H₆O). B forms a shining silver mirror on warming with ammoniacal silver nitrate. B when treated with an aqueous solution of H₂NCONHNH₂. HCl and sodium acetate gives a product C. Identify the structure of C.

• CH₃CH₂CH=NNHCONH₂

• CH₃-C(CH₃)=NNHCONH₂

• CH₃-C(CH₃)=NCONHNH₂

• CH₃CH₂CH=NCONHNH₂