MCQ
Most abundant uncombined element present in atmosphere is:
- A$Ca$
- B$Mg$
- C$Al$
- ✓$N$
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(a) Water solubility is maximum at a $pH$ when concentrations of anions and cations are equal
(b) They give ninhydrin test
(c) On reacting with nitrous acid give off ${N_2}$