1. Which type of chemical reaction occurs when nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773 K to form ammonia gas?

Question

Chemical reactions are characterized by the change in the state, colour and the temperature. Many changes which happens around us are the result of the chemical reaction. Therefore, the chemical reactions are classified into various categories to simplify their study.

1. Which type of chemical reaction occurs when nitrogen gas is treated with hydrogen gas in the presence of a catalyst at 773 K to form ammonia gas?

(i) Combination reaction

(ii) Displacement reaction

(iii) Redox reaction

(iv) Double displacement reaction

2. Which type of chemical reaction occurs when Sodium hydroxide solution is treated with acetic acid to form sodium acetate and water?

(i) Redox reaction

(ii) Combination reaction

(iii) Displacement reaction

(iv) Double displacement reaction

3. Which type of chemical reaction occurs when Ethanol is warmed with ethanoic acid to form ethyl acetate in the presence of concentrated H₂SO₄?

(i) Displacement reaction

(ii) Double displacement reaction

(iii) Redox reaction

(iv) Combination reaction

4. Which type of chemical reaction occurs when Ethene is burnt in the presence of oxygen to form carbon dioxide, water and releases heat and light?

(i) Decomposition reaction

(ii) Displacement reaction

(iii) Double displacement reaction

(iv) None of the above

Answer 1

1. (i) Combination reaction

2. (iv) Double displacement reaction

3. (ii) Double displacement reaction

4. (iii) Both (i) and (ii)

5. (ii) Displacement reaction