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9. Amines — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry9. Amines1 Mark
MCQ
Which one of the following is not a base
  • A
    ${N_2}{H_4}$
  • B
    $N{H_2}OH$
  • C
    ${(C{H_3})_3}N$
  • ✓
    $H{N_3}$
✓

Answer

Correct option: D.
$H{N_3}$
d
Explanation:

$(A)$ hydrazoic acid $N _3 H$, dissociates into $N _3$ - and $H +$. Due to the formation of hydrogen ion, it is an acid.

$(B)$ In $N_2H_4$, nitrogen easily donates it's lone pair, so it is a base.

$(C)$ $NH_2 Oh$ is basic because it has hydroxyl ions.

$(D)$ The compound trimethylamine, $\left( CH _3\right)_3 N$, is a weak base when dissolved in water.

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