MCQ
Gabriel phthalamide synthesis is used for preparation of :-
- ✓$RNH_2$
- B$R_2NH$
- C$R_3N$
- D$PhNH_2$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Assertion $A$ : Aniline on nitration yields ortho, meta and para nitro derivatives of aniline.
Reason $R$: Nitrating mixture is a strong acidic mixture.
In the light of the above statements, choose the correct answer from the options given below

$Zn(s) + N{i^{2 + }}(a = 1.0)$ $\rightleftharpoons$ $Z{n^{2 + }}(a = 10) + Ni(s)$ occurs, is found to be $0.5105\,V$ at $298\,K$. The standard e.m.f. of the cell is ............ $\mathrm{V}$