MCQ
Which of the following is a normal element
- A$Ce$
- B$He$
- ✓$Li$
- D$Ar$
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$(1)$ $C{H_2} = C{H_2}$
$(2)$ ${(C{H_3})_2}C = C{H_2}$
$(3)$ $C{H_3}CH = CHC{H_3}$


$n - Pr = n -$ propyl
Product' $(A)$ is
$X \rightleftharpoons Y + Z$ $...(i)$
$A \rightleftharpoons 2B$ $...(ii)$
are in the ratio $9 : 1.$ If degree of dissociation of $X$ and $A$ be equal, then total pressure at equilibrium $(i)$ and $(ii)$ are in the ratio
(molar mass of heptane $= 100\, g\, mol^{-1}$ and of octane $= 114\, g\,mol^{-1}$)