The bleaching action of $SO_2$ is due to its:

$SiCl_4$ on hydrolysis forms '$X$' and $HCl$. Compound '$X$' loses water at $1000^\circ C$ and gives '$Y$'. Compounds '$X$' and '$Y$' respectively are:

The position vectors of $P$ and $Q$ are respectively $\overrightarrow{a}$ and $\overrightarrow{b}$. If $R$ is a point such that $\overrightarrow{PR}=5 \overrightarrow{PQ}$, then the position vector of $R$ is

$A$ homogeneous solid cylinder of length $L$ $(L < H/2)$ and cross-sectional area $A'$ is immersed such that it floats with its axis vertical at the liquid-liquid interface with length $L/4$ in the denser liquid (density $2d$) and $3L/4$ in the lighter liquid (density $d$) as shown in the figure. The density $D$ of the solid is given by:

The major product of the reaction is :

The Nobel Prize was awarded to Paul Muller for the discovery of which of the following pesticides?