Question

Which of the following is (are) secondary suffix?

• A. Sulpho
• B. Carbamoyl
• C. Cyano
• D. isocyanide

Answer 1

Answer: (A), (B), (C)

Cyano

Explanation for correct options:

(A), (B), & (C)

• Secondary suffix is always used for principal functional groups.
• Sulpho, Carbamoyl and Cyano are suffix of functional groups
• The suffix ‘’ Sulpho '' is for $-{\mathrm{SO}}_3\mathrm{H}$ group.
• The suffix ‘’ Carbamoyl '' is for $-{\mathrm{CONH}}_2$ Acid amides group.
• The suffix ‘’ Cyano'' is for $-\mathrm{CN}$ Nitriles group.
• All these are secondary suffix.

Explanation for Incorrect option:

(D) Isocyanide

• Isocyanide is a suffix. For example, methyl isocyanide $\left({\mathrm{CH}}_3-\mathrm{NC}\right)$.

Hence, the correct options are - (A), (B), and (C).