Question

`S_(1)`interstitial compound have high melting points, higher than those of pure metals.
`S_(2)` Permanganate titration in presence of hydrochloric acid are unsatisfactory
`S_(3)`: `KmnO_(4)` does not act as an oxidising agent in strong alkaline medium.
`S_(4):KMnO_(4)` On heating in a current of `H_(2)` gives `MnO`
A. TTFT
B. TFFT
C. TFTT
D. FFTF

Answer 1

Correct Answer - A
`S_(1)`: Due to strong interatomic forces.
`S_(2)`: Some of the hydrochloric acid is oxidised to chlorine and thus we get less volume of `KMnO_(4)` than the actual one.
`S_(3)`: `MnO_(4)^(-)+e^(-)overset(OH^(-))toMnO_(4)^(3-)` ltBrgt `S_(4):2KMnO_(4)+5H_(2)to2KOH+2MnO+H_(2)`