MCQ
(image) $\xrightarrow{\Delta }X;X$ can also be formed by


- A$CH_3-CH_2-CH_2-Cl \xrightarrow{{LiAl{H_4}}}$
- B$CH_3-CH_2-COOH \xrightarrow{{P + HI}}$
- ✓$C{H_3} - C \equiv CH\xrightarrow[{{H_2}O}]{{H{g^{ + 2}}}}$
- DAll

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$A : 1s^2\, 2s^2\, 2p^6$
$B : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^3$
$C : 1s^2\, 2s^2\, 2p^6\, 3s^2\, 3p^5$
The correct statement for the ionic radius of $\mathrm{N}^{3-}$ from the following is :
$aCr _2 O _7^{2-}+ bSO _3^{2-}( aq )+ cH ^{+}( aq ) \rightarrow 2 aCr ^{3+}( aq )+ bSO _4^{2-}( aq )+\frac{ c }{2} H _2 O ( l )$
the coefficients a, b and $c$ are found to be, respectively-