If ‘X’ litres of Ethene would be produced when $2.62\mathrm{gm}$ of vinyl magnesium bromide is treated with $224\mathrm{ml}$ of ethyne at STP. Then what is the value of “1000 X”?

2 mol ${\mathrm{CH}}_2=\mathrm{CHMg}\text{}\mathrm{Br}$ require 1mol ${\mathrm{C}}_2{\mathrm{H}}_2$ & gives $44.8\mathrm{ltrs}{\mathrm{C}}_2{\mathrm{H}}_4$

$44.8\mathrm{ltrs}{\mathrm{C}}_2{\mathrm{H}}_4$  With  $22400\mathrm{ml}{\mathrm{C}}_2{\mathrm{H}}_2$ gives $448\mathrm{ltrs}{\mathrm{C}}_2{\mathrm{H}}_4$.

$2.62\mathrm{gm}$ salt with $224\mathrm{ml}{\mathrm{C}}_2{\mathrm{H}}_2$ gives  $0.448\mathrm{ltr}{\mathrm{C}}_2{\mathrm{H}}_4= \mathrm{x}$

$\therefore {10}^3\mathrm{{\rm X}}\Rightarrow 1000\times 0.448\Rightarrow 448\mathrm{ltr}{\mathrm{C}}_2{\mathrm{H}}_4$