MCQ
Avogadro number is
- ANumber of atoms in one gram of element
- BNumber of millilitres which one mole of a gaseous substances occupies at $NTP$
- ✓Number of molecules present in one gram molecular mass of a substance
- DAll of these
It is equal to $6.022 \times 10^{23}$.
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$(A)$ $\mathrm{H}$ and $\mathrm{H}$
$(B)$ $\mathrm{H}$ and $\mathrm{C}_2 \mathrm{H}_5$
$(C)$ $\mathrm{C}_2 \mathrm{H}_5$ and $\mathrm{H}$
$(D)$ $\mathrm{CH}_3$ and $\mathrm{CH}_3$

$CH \equiv CH\xrightarrow[{{\text{(2) CO , HCl , AlC}}{{\text{l}}_3}}]{{{\text{(1) Red hot Fe tube, 873 K}}}}$ Product The number of $sp ^{2}$ hybridized carbon atom(s) present in the product is ..........
