MCQ
In benzene $1, 3$ position is called
- ✓Meta
- BPara
- COrtho
- DOdd position
$1, 3$ or $1, 5$ = meta
$1, 4$ = para.
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| Element | Atomic mass |
| $A$ | $12.01$ |
| $B$ | $35.5$ |
$A$ and $B$ combine to form new substance $X$ . If $4\,moles$ of $B$ combine with $1\,mole$ of $A$ to give $1\,mole$ of $X,$ then weight of one mole of $X$ is ........... $\mathrm{g}$
