In which of the following reactions is hydrogen gas not liberated?
- AReaction of fused $NaOH$ with $C$
- BReaction of $NaOH$ with sulphur
- CHeating the concentrated $NaOH$ with $Si$
- DReaction of zinc with $NaOH$
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Match the following lists:
List-$I$ List-$II$ $(A)$ Benzene $1$. Phosgene $(B)$ Ethylene $2$. Silver mirror $(C)$ Acetaldehyde $3$. Mustard gas $(D)$ Chloroform $4$. $(4n + 2) \pi$ electrons $5$. Carbylamine
The correct matching is:
| List-$I$ | List-$II$ |
|---|---|
| $(A)$ Benzene | $1$. Phosgene |
| $(B)$ Ethylene | $2$. Silver mirror |
| $(C)$ Acetaldehyde | $3$. Mustard gas |
| $(D)$ Chloroform | $4$. $(4n + 2) \pi$ electrons |
| $5$. Carbylamine |
The correct matching is:
$A$ force of $(3\hat i + 4\hat j)\, N$ acts on a body and displaces it by $(3\hat i + 4\hat j)\, m$. The work done by the force is ............. $J$.
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