(a) Give one example of a metal which: (i) can displace hydrogen from cold water...
CHEMISTRY
WAEC 1997
(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?
Explanation
(a)(i) Sodium(Na)
(ii) copper (Cu)
(iii) magnesium (Mg)
(b)(i) J is lead (Pb)
(ii) Reduction.
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