Home/ Questions/Q 489098
Next
In Process
Alka Rajesh Jhaveri
Asked: 2022-11-08T07:04:10+05:30 In:

Statement-1 :`V` group basic radicals are precipitated as their carbonates by `(NH_(4))_(2)CO_(3)` in presence of ammonia or ammonium chloride.
Statement-2 :Aqueous ammonia maintains the `pH` of the solution basic.
A. STATEMENT-1 is true, STATEMENT-2 is true and STATEMENT-2 is correct explanation for STATEMENT-1
B. STATEMENT-1 is true, STATEMENT-2 is true and STATEMENT-2 is not correct explanation for STATEMENT-2
C. STATEMENT-1 is true, STATEMENT-2 is false
D. STATEMENT-1 is false, STATEMENT-2 is true

Statement-1 :`V` group basic radicals are precipitated as their carbonates by `(NH_(4))_(2)CO_(3)` in presence of ammonia or ammonium chloride.
Statement-2 :Aqueous ammonia maintains the `pH` of the solution basic.
A. STATEMENT-1 is true, STATEMENT-2 is true and STATEMENT-2 is correct explanation for STATEMENT-1
B. STATEMENT-1 is true, STATEMENT-2 is true and STATEMENT-2 is not correct explanation for STATEMENT-2
C. STATEMENT-1 is true, STATEMENT-2 is false
D. STATEMENT-1 is false, STATEMENT-2 is true
Parabola
Leave an answer

Leave an answer

Browse

1 Answer

  1. Correct Answer – B
    Statement-1 :In the presence of `NH_(4)^(+)` salts, no precipitation of `Mg^(2+)` occurs because the equilibrium
    `NH_(4)^(+) + CO_(3)^(2-) hArr NH_(3) +HCO_(3)^(-)` is shifted towards the formation of `HCO_(3)^(-)` ions. `K_(sp)` of the precipitate being high (`K_(sp)` of pure `MgCO_(3)` is `1xx10^(-5)`), the concentration of carbonate ions necessary to produce a precipitate is not attained.
    Statement-2 :`NH_(4)OH` turns red litmus blue.`NH_(4)OH hArr NH_(4)^(+) +OH^(-)`

    • 0