The chloride that CANNOT get hydrolysed is :

Peroxyacetyl nitrate (PAN), an eye irritant is produced by :

The correct statements among (a) to (d) regarding H₂ as a fuel are :

(a)   It produces less pollutants than petrol.

(b)   A cylinder of compressed dihydrogen weighs $$ \sim $$ 30 times more than a petrol tank producing the same amount of energy.

(c)   Dihydrogen is stored in tanks of metal alloys like NaNi₅.

(d)   On combustion, values of energy released per gram of liquid dihydrogen and LPG are 50 and 142 KJ, respectively.

The element that usually does NOT show variable oxidation states is :