Question

Indicate if the following statements are true or false.
(a) Oxides of non-metals dissolve in water to form some acids.
(b) Sulphites are salts formed from sulphuric acid.
(c) Phosphoric acid is tribasic.
(d) Nitric acid can only form normal salts.
(e) Hydrochloric acid can form both carbonates and bicarbonate.
(f) Carbonic acid can form both carbonates and bicarbonates.
(g) Water of crystallisation is found in anhydrous salts.
(h) Litmus turns red in the presence of alkalis.
(i) An acid reacts with a carbonate to form a salt, and hydrogen gas is obtained.
(j) Acid taste sweet.
(k) When the metal zinc reacts with hydrochloric acid, a salt called zinc chloride is formed.
(l) when metals react directly with acids, the reaction is called a displacement reaction.
(m) Sulphuric acid has the formula H₂SO₃.
(n) Carbon dioxide gas is given off as a result of displacement reactions between acids and metals.

Answer 1

(a) True
(b) False
Sulphates are salts formed from sulphuric acid.
(c) True
(d) True
(e) False
Hydrochloric acid can form only chlorides, not carbonates and bicarbonates.
(f) True
(g) False
Anhydrous salt is the salt without water of crystallisation. Water of crystallisation is present in hydrated salts.
(h) False
Litmus turns blue in the presence of alkalis.
(i) False
An acid reacts with a carbonate to form a salt, water and carbon dioxide gas is obtained.
(j) False
Acid tastes sour.
(k) True
(l) True
(m) False
Sulphuric acid has the formula H₂SO₄.
(n) False
Carbon dioxide gas is given off as a result of displacement reaction between acids and metal carbonates.