MCQ
Polyvinylalcohol can be prepared by
- ✓polymerization of vinyl alcohol
- Balkaline hydrolysis of polyvinyl acetate
- Cpolymerization of acetylene
- Dreaction of acetylene with $H_2SO_4$ in presence of $HgSO_4$

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$\mathop {C{H_3} - \mathop C\limits^ \oplus H - C{H_3}}\limits_I $
$\mathop {C{H_3} - \mathop C\limits^ \oplus H - OC{H_3}}\limits_{II} $
$\mathop {C{H_3} - \mathop C\limits^ \oplus H - C{H_2} - OC{H_3}}\limits_{III} $

(image)
$A \rightarrow B$ is an adiabatic process. If the total heat absorbed in the entire process ( $A \rightarrow B$ and $B \rightarrow C$ ) is $R T_2 \ln 10$, the value of $2 \log V_3$ is . . . . . [Use, molar heat capacity of the gas at constant pressure, $\mathrm{C}_{\mathrm{p}, \mathrm{m}}=\frac{5}{2} \mathrm{R}$ ]