MCQ
Arrange in the order of increasing basic character $(NO_2, K_2O, ZnO)$
- ✓$NO_2, ZnO, K_2O$
- B$K_2O, ZnO, NO_2$
- C$ZnO, NO_2, K_2O$
- D$K_2O, NO_2, ZnO$
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(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 ${N_2}$