- A$8$
- ✓$9$
- C$7$
- D$6$
$Kt _{1110}=\ln \left\{\frac{ C _0}{ C _{ O } / 10}\right\}=\ln 10$
then $\frac{t_{1 / 8}}{t_{1 / 10}} \times 10=\frac{\ln 8}{\ln 10} \times 10=\frac{\log 2}{\log 10} \times 10=9$
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$(a)$ $R_2SiO$ is repeating unit of linear silicones
$(b)$ $R$ $SiCl_3$ on hydrolysis followed by dehydration gives linear silicones
$(c)$ Silicones can be used as heat insulator
$(d)$ Silica is soluble in $HF$
The correct statement$(s)$ is/are

$\begin{array}{*{20}{c}}
{C{H_3} - C{H_2} - CH - C{H_3}\xrightarrow{{C{H_3}{O^\Theta }}}X} \\
{|\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,} \\
{F\,\,\,\,\,\,\,\,\,\,\,\,\,}
\end{array}$ product
The alkene formed in major amount

