Question

1. A substance which oxidises itself and reduces othe skne
(a) oxidising agent
(b) reducing agent
(c) both of these
(d) none of these
2. The reaction Fe2O3 +2A1 > Al2O3 +2Fe, is an example of a-
(a) combination reaction
(b) double displacement reaction
(c) decomposition reaction
(d) displacement reaction
OR
Acetic acid was added to a solid X kept in a test tube. A colourless and
evolved. The gas was passed through lime water which turned milky. It was
(a) Solid X is sodium hydroxide and the gas evolved is CO2
(b) Solid X is sodium bicarbonate and the gas evolved is CO2
(©) Solid X is sodium acetate and the gas evolved is CO2
(d) Solid X is sodium chloride and the gas evolved is CO2
3. When an acid reacts with a metal carbonate or metal hydrogen cart
corresponding salt, ........ gas and ....​

Answer 1

Answer:

Explanation:

1.A substance which oxidises itself and reduces other is known as a reducing agent. b option is correct.

2.

It is an example of displacement reaction. Aluminium being more reactive than iron displaces iron and results in the formation of aluminium oxide.

solution d option is correct

3.Acid + Metal carbonate  ⟶ Salt + Water + Carbon dioxide

CaCO3​ (calcium carbonate-metal carbonate) + 2HCl ⟶ CaCl2​ (calcium chloride-salt) + H2​O + CO2​