(a) Give one example of a metal which: (i) can displace hydrogen from cold water (ii) at red-heat, reacts reversibly with steam (iii) does not react with di...

(a) Give one example of a metal which:

(i) can displace hydrogen from cold water

(ii) at red-heat, reacts reversibly with steam

(iii) does not react with dilute hydrochloric acid

(b) When dry hydrogen was passed over lead (II) oxide, a greyish solid J was obtained.

(i) Identify J

(ii) What type of reaction was involved in the formation of J from lead (II) oxide?