In the reaction, $\mathrm{R}-\mathrm{X} \stackrel{\mathrm{alcoholic} \mathrm{KCN}}{\to } \mathrm{A} \stackrel{\mathrm{dilute} \mathrm{HCl}}{\to } \mathrm{B}$

The product B is :

• alkyl chloride

• aldehyde

• carboxylic acid

• ketone

By heating phenol with chloroform in alkali, it is converted into :

• salicylic acid

• salicylaldehyde

• anisole

• phenyl benzoate

When a mixture of calcium benzoate and calcium acetate is dry distilled, the resulting compound is :

• acetophenone

• benzaldehyde

• benzophenone

• acetaldehyde

Which of the following does not give benzoic acid on hydrolysis?

• Phenyl cyanide

• Benzoyl chloride

• Benzyl chloride

• Methyl benzoate

55.

Which of the following would undergo Hofmann reaction to give a primary amine?

• R-CO-Cl

• RCONHCH₃

• RCONH₂

• RCOOR

Glucose contains in addition to aldehyde group:

• one secondary OH and four primary OH groups

• one primary OH and four secondary OH groups

• two primary OH and three secondary OH groups

• three primary OH and two secondary OH groups

A distinctive and characteristic functional group of fats is

• a peptide group

• an ester group

• an alcoholic group

• a ketonic group

At pH = 4, glycine exists as

• ${\mathrm{H}}_3\stackrel{+}{\mathrm{N}}-{\mathrm{CH}}_2- {\mathrm{COO}}^{-}$

• ${\mathrm{H}}_3\stackrel{+}{\mathrm{N}}-{\mathrm{CH}}_2- \mathrm{COOH}$

• ${\mathrm{H}}_2\mathrm{N}-{\mathrm{CH}}_2- {\mathrm{COO}}^{-}$

• ${\mathrm{H}}_2\mathrm{N}-{\mathrm{CH}}_2- \mathrm{COOH}$

Insulin regulates the metabolism of

• minerals

• amino acids

• glucose

• vitamins

Acrolein test is positive for:

• polysaccharides 

• proteins

• oils and fats

• reducing sugars