MCQ
Nitrogen gas is obtained by thermal decomposition of .... .
- A$Ba \left( NO _{3}\right)_{2}$
- ✓$Ba \left( N _{3}\right)_{2}$
- C$NaNO _{2}$
- D$NaNO _{3}$
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$\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\text { (iii) } \mathrm{HBr}{(iv) \mathrm{Mg}, ether, then \mathrm{HCHO} / \mathrm{H}_3 \mathrm{O}^{+}}]{{(i)BH_3}{\text { (ii) } \mathrm{H}_2 \mathrm{O}_2,{ }^{\text {(-) }} \mathrm{OH}}} \mathrm{A}$
$Zn(s) + N{i^{2 + }}(a = 1.0)$ $\rightleftharpoons$ $Z{n^{2 + }}(a = 10) + Ni(s)$ occurs, is found to be $0.5105\,V$ at $298\,K$. The standard e.m.f. of the cell is ............ $\mathrm{V}$