MCQ
Which is amphoteric oxides ?
- A$BeO$
- B$SnO$
- C$ZnO$
- ✓all of these
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$2 {X}+\mathrm{B}_2 \mathrm{H}_6 \rightarrow\left\lfloor\mathrm{BH}_2(\mathbf{X})_2\right\rfloor^{+}\left\lfloor\mathrm{BH}_4\right]^{-}$ the amine(s) ${X}$ is$(are)$
$(A)$ $\mathrm{NH}_3$ $(B)$ $\mathrm{CH}_3 \mathrm{NH}_2$ $(C)$ $\left(\mathrm{CH}_3\right)_2 \mathrm{NH}$ $(D)$ $\left(\mathrm{CH}_3\right)_3 \mathrm{~N}$
| List-$I$ | List-$II$ |
| $P$ In process $I$ | $1$ Work done by the gas is zero |
| $Q$ In process $II$ | $2$ Temperature of the gas remains unchanged |
| $R$ In process $III$ | $3$ No heat is exchanged between the gas and its surroundings |
| $S$ In process $IV$ | $4$ Work done by the gas is $6 P _0 V _0$ |

