Question

8. K, Na, Ca, Mg, Al, Zn, Fe, Sn, Pb, H, Cu, Hg, Ag and Au constitute activity series. Answer the following questions :

(a) Name the metal which reacts fastest with cold water.

(b) Name the metal which does not react with cold water, but reacts with boiling hot water very slowly.

(c) Name the metal which on heating reacts with steam, but reaction is reversible.

(d) Name a metal which reacts explosively with dilute HCI.

(e) Name a metal which reacts vigorously with dilute HCl.

(f) Name a metal which displaces hydrogen very slowly from dilute HCI.

(g) Name a metal which does not react with water or dilute HCI.​

Answer 1

a) potassium

b) magnesium

c) iron

d) aluminium

e)sodium

f) plumbum

g) Mercury

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