MCQ
Boric acid is an acid because its molecule
- Acontains replaceable $H^+$ ion
- Bgives up a proton
- ✓accepts $OH^-$ from water releasing proton.
- Dcombines with proton from water molecule.
$\mathrm{B}(\mathrm{OH})_{3}+\mathrm{H}_{2} \mathrm{O} \longrightarrow\left[\mathrm{B}(\mathrm{OH})_{4}\right]^{(-)}(\mathrm{aq})+\mathrm{H}^{(-)}(\mathrm{aq})$
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$\left[\right.$ Given $: \mathrm{N}_{\mathrm{A}}=6.02 \times 10^{23}\, \mathrm{~mol}^{-1}$, Atomic mass of $\mathrm{Na}=23.0\, \mathrm{u}]$
| Column $I$ | Column $II$ |
| $(A)$ $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CHO}$ | $(p)$ gives precipitate with $2, 4$-dinitrophenylhydrazine |
| $(B)$ $\mathrm{CH}_3 \mathrm{C} \equiv \mathrm{CH}$ | $(q)$ gives precipitate with $\mathrm{AgNO}_3$ |
| $(C)$ $\mathrm{CN}^{-}$ | $(r)$ is a nucleophile |
| $(D)$ $\mathrm{I}^{-}$ | $(s)$ is involved in cyanohydrin formation |
$I.$ $H_2O_2$ $II.$ $O_2$ $III.$ $O_3$
How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom ?