MCQ
Highest value of $pK_b$ will be of :
- ✓$NH_3$
- B$(CH_3)_2NH$
- C$(CH_3)_3N$
- D$CH_3NH_2$
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($A$) $\left[\mathrm{Pt}(\mathrm{en})(\mathrm{SCN})_2\right]$
($B$) $\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right]$
($C$) $\left[\mathrm{Pt}\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_4\right]$
($D$) $\left[\mathrm{Cr}(\mathrm{en})_2\left(\mathrm{H}_2 \mathrm{O}\right)\left(\mathrm{SO}_4\right)\right]^{+}$
They were labelled $ A$ and $B$ for testing.
$A$ and $ B $ were separately taken in test tubes and boiled with $NaOH$ solution.
The end solution in each tube was made acidic with dilute $HN{O_3}$ and then some $AgN{O_3}$ solution was added.
Substance $B$ give a yellow precipitate.
Which one of the following statements is true for this experiment
| Initial $[A_2]$ | Initial $[B_2]$ | $R.O.R.\,(r)\,Ms^{-1}$ |
| $0.2$ | $0.2$ | $0.04$ |
| $0.1$ | $0.4$ | $0.04$ |
| $0.2$ | $0.4$ | $0.08$ |
Order of reaction with respect to $A_2$ and $B_2$ are respectively
|
List$-I$ (Species) |
List$-II$ (Number of lone pairs of electrons on the central atom) |
| $(a)$ $\mathrm{XeF}_{2}$ | $(i)\, 0$ |
| $(b)$ $\mathrm{XeO}_{2} \mathrm{~F}_{2}$ | $(ii) \,1$ |
| $(c)$ $\mathrm{XeO}_{3} \mathrm{~F}_{2}$ | $(iii) \,2$ |
| $(d)$ $\mathrm{XeF}_{4}$ | $(iv) \,3$ |
Choose the most appropriate answer from the options given below: