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The increasing order of `pK_b` value of the following is : (I) `HC -= C^(Ө)` `H^(Ө)` `overset (Ө) NH_2` (IV) `C overset (Ө) H_3`.A. `IV lt III lt II lt I`B. `I lt II lt III lt IV`C. `IV lt II lt III lt I`D. `I lt III lt II lt IV` |
Answer» Correct Answer - A (a) Acidity : `HC -= H_2 gt NH_3 gt CH_4` Basicity : `HC -= C^(Ө) lt overset (Ө) H lt overset (Ө) N H_2 lt C overset (Ө) H_3` The lower the value of `pK_b`, the stronger is the base. The decreasing order of `pK_b` values : `C overset (Ө) H lt overset (Ө)N H_2 lt H^(Ө) lt HC -= C^(Ө) (IV lt III lt II lt I)`. |
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