Metals react with water to form either their respective oxides or hydroxides and liberate:

Q. Which among the following statements is incorrect for magnesium metal?

(a) It burns in oxygen with a dazzling white flame.
(b) It reacts with cold water to form magnesium oxide and evolves hydrogen gas.
(c) It reacts with hot water to form magnesium hydroxide and evolves hydrogen gas.
(d) It reacts with steam to form magnesium hydroxide and evolves hydrogen gas.

Q. Metal X does not give hydrogen gas when allowed to react with cold or hot water but it reacts with steam to form metal oxide and hydrogen gas. Metal X cannot be

Q.

Write a balanced chemical equation for each of the following :

1. Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.

2. Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

3. Methyl alcohol burns in air to form carbon dioxide and water.

4. Liquid hydrogen peroxide decomposes to give water and oxygen gas.

5. Aluminium hydroxide reacts with sulphuric acid to give ammonium sulphate and water.

6. Aluminium sulphate solution reacts with sodium hydroxide to form a precipitate of aluminium hydroxide.

Q.

Question 33
Write a balanced chemical equation for each of the following reactions and also classify them.

(a) Lead acetate solution is treated with dilute hydrochloric acid to form lead chloride and acetic acid solution.

(b) A piece of sodium metal is added to absolute ethanol to form sodium ethoxide and hydrogen gas.

(c) Iron (III) oxide on heating with carbon monoxide gas reacts to form solid iron and liberates carbon dioxide gas.

(d) Hydrogen sulphide gas reacts with oxygen gas to form solid sulphur and liquid water.

Q. Calcium reacts __________ with water and forms calcium hydroxide and liberates hydrogen gas.