MCQ
$S_{N^1}$ and $S_{N^2}$ reactions a.re
- ABoth stereospecific
- BBoth stereoselective
- CStereoselective and stereospecific respectively
- ✓Both $(b)$ and $(c)$
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Given : $K _{ sp } Cu ( OH )_2=1 \times 10^{-20}$
$\operatorname{Take} \frac{2.303 RT }{ F }=0.059 \,V$
The reduction potential at $pH =14$ for the above couple is $(-) x \times 10^{-2}\,V$. The value of $x$ is $........$.
| Element | $IE_1$ | $IE_2$ | $IE_3$ | $IE_4$ |
| $W$ | $10.5$ | $15.5$ | $24.9$ | $79.8$ |
| $X$ | $8$ | $14.8$ | $78.9$ | $105.8$ |
Other two elements $Y$ and $Z$ have outer electronic configuration $ns^2$ $np^4$ and $ns^2$ $np^5$ respectively. According to given information which of the following compound $(s)$ is/are not possible
$(a)\, W_2Y_3\, (b)\, X_2Y_3\, (c)\, WZ_2\, (d)\, XZ_2$
$(I)\, Pt(SCN)_2 - 3PEt_3,$ $(II)\,CoBr ·SO_4 · 5NH_3$ $(III)\, FeCl_2 · 6H_2O$