When $100 \mathrm{mL}$ of a ${\mathrm{O}}_2-{\mathrm{O}}_3$ mixture was passed through turpentine, there was reduction of volume by $20 \mathrm{mL}.$ If $50 \mathrm{mL}$ of such a mixture is heated, what will be the increase in volume?

${\mathrm{N}}_2{\mathrm{H}}_4,$ Hydrazine a rocket fuel can be produced according to the following reaction :
${\mathrm{ClNH}}_2+2{\mathrm{NH}}_3⟶{\mathrm{N}}_2{\mathrm{H}}_4+{\mathrm{NH}}_4\mathrm{Cl}$
When $103 \mathrm{g} {\mathrm{ClNH}}_2$ is reacted with excess of ${\mathrm{NH}}_3, 51.2 \mathrm{g}{ \mathrm{N}}_2{\mathrm{H}}_4$ is produced. What is the $\%$ yield of the reaction.

Molecular weight of ${\mathrm{ClNH}}_2$=51.5 g/mol; Molecular weight of ${\mathrm{N}}_2{\mathrm{H}}_4$=32 g/mol

Carbon disulphide $\text{'}{\mathrm{CS}}_2\text{'},$ can be made from by product ${\mathrm{SO}}_2.$ The overall reaction is:

$5\mathrm{C}+2{\mathrm{SO}}_2⟶{\mathrm{CS}}_2+4\mathrm{CO}$

How much ${\mathrm{CS}}_2$ (in $\mathrm{kg})$ can be produced from $64 \mathrm{kg}$ of waste ${\mathrm{SO}}_2$ with excess of coke if the ${\mathrm{SO}}_2$ conversion is$75\%$.