Q7 · CSIR NET Chemistry, June 2021
Paper: CSIR NET June 2021 · Subject: Inorganic Chemistry · Chapter: Chemical Bonding · Topic: Hydrogen Bonding Weak Interactions · Marks: 2 · Difficulty: Medium
The total number of lone pairs of electrons on all the atoms in cyanogen azide and thiocyanogen respectively, are
(a)4 and 6
(b)6 and 6
(c)3 and 4
(d)4 and 4
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Cyanogen azide N≡C–N₃: nitrile N 1, the N bonded to C 1, central N 0, terminal N 2 → 4. Thiocyanogen N≡C–S–S–C≡N: each N 1, each S 2 → 6.
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