Free Test Isocyanides – NEET

Q1: What is the general formula of isocyanides?

A. R–NH2 B. R–CN C. R–NC D. R–COOH

Q2: Which of the following is the correct IUPAC name of CH3NC?

A. Methyl isocyanide B. Isomethane nitrile C. Methyl cyanide D. Methanenitrile

Q3: Isocyanides are isomers of:

A. Amines B. Nitriles C. Alcohols D. Ketones

Q4: Isocyanides can be prepared from:

A. Primary alcohols B. Primary amines C. Ketones D. Alkenes

Q5: The reaction of primary amine with chloroform and alcoholic KOH gives:

A. Aniline B. Cyanide C. Isocyanide D. Nitro compound

Q6: Carbylamine test is used to detect:

A. Aldehydes B. Primary amines C. Secondary amines D. Tertiary amines

Q7: Isocyanides have a characteristic:

A. Sweet smell B. Pleasant fruity smell C. Foul smell D. No smell

Q8: Which hybridization is present on carbon in isocyanide?

A. sp B. sp2 C. sp3 D. None

Q9: Which compound does NOT give a carbylamine test?

A. CH3NH2 B. C6H5NH2 C. CH3CH2NH2 D. (CH3)2NH

Q10: The structure of isocyanide contains which type of bond between N and C?

A. Single bond B. Double bond C. Triple bond D. Coordinate bond

Q11: Isocyanides can be hydrolyzed under acidic conditions to give:

A. Amines B. Alcohols C. Carboxylic acids D. Formamides

Q12: Which of the following does not undergo carbylamine reaction?

A. CH3NH2 B. C2H5NH2 C. CH3CONH2 D. C6H5NH2

Q13: Which reagent is essential for carbylamine reaction?

A. NaOH B. KOH C. HCl D. H2SO4

Q14: The carbylamine reaction is used to detect:

A. Nitriles B. Ketones C. Primary amines D. Tertiary amines

Q15: Isocyanides are also called:

A. Carbamides B. Isonitriles C. Urethanes D. Amides

Q16: The bond angle in R–N≡C is approximately:

A. 109° B. 120° C. 180° D. 90°

Q17: Which compound has the most pungent smell?

A. Methyl isocyanide B. Ethyl alcohol C. Acetic acid D. Acetone

Q18: Isocyanides are less stable than:

A. Alkanes B. Cyanides C. Ketones D. Ethers

Q19: In the carbylamine reaction, chloroform acts as a source of:

A. Methyl group B. Isocyanide C. Carbon atom D. Amines

Q20: Which is an application of isocyanides?

A. Antiseptics B. Perfumes C. Pesticide synthesis D. Food additives

Quiz for Isocyanides