21. Match each element on the right with its property on the left.
Property Element
(A) A dark red liquid (i) Neon
(B) A metal used in jewellery (ii) Bromine
(C) A totally inert gas (iii) Sodium
(D) A reactive metal that (iv) Gold
(E) explodes in water (v) Nitrogen
(a) A-i, B-iii, C-iv, D-v
(b) A-ii, Biv, C-i, D-iii
(c) A-iii, B-ii, C-v, D-iv
(d) A-i, B-ii, C-iii, D-iv
Property Element
(A) A dark red liquid (i) Neon
(B) A metal used in jewellery (ii) Bromine
(C) A totally inert gas (iii) Sodium
(D) A reactive metal that (iv) Gold
(E) explodes in water (v) Nitrogen
(a) A-i, B-iii, C-iv, D-v
(b) A-ii, Biv, C-i, D-iii
(c) A-iii, B-ii, C-v, D-iv
(d) A-i, B-ii, C-iii, D-iv
22. The chemical name of quick lime is
(a) Calcium hydroxide
(b) Calcium oxide
(c) Calcium chloride
(d) Calcium carbonate
(a) Calcium hydroxide
(b) Calcium oxide
(c) Calcium chloride
(d) Calcium carbonate
23.Which of the following are used to prepare the main storage (starch) form of food in plants?
(a) Carbon dioxide and, oxygen
(b) water and oxygen
(c) Carbon dioxide and Nitrogen
(d) Carbon dioxide and water
(a) Carbon dioxide and, oxygen
(b) water and oxygen
(c) Carbon dioxide and Nitrogen
(d) Carbon dioxide and water
24. The antacid marketed as milk of magnesia has as main ingredient:
(a) MgCo3
(b) MgSO4
(c) Mg(OH)2
(d) MgCl2
(a) MgCo3
(b) MgSO4
(c) Mg(OH)2
(d) MgCl2
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