Bright Tutorials Bright Tutorials
ICSE Class 10 Chemistry Question 20 of 23

Solved Sample Paper 1 — Question 19

Back to all questions
19
Question

Question 7(iii)

(a) List any two uses of ammonia.

(b) Give the balanced equations for the following conversions

  1. Ammonia solution to an amphoteric hydroxide
  2. Ammonia to brown gas
Answer

(a) Two uses of ammonia are:

  1. Liquid ammonia is used as a refrigerant in ice plants.
  2. Ammonia is used in the manufacture of nitrogenous fertilisers like ammonium sulphate, ammonium nitrate, urea, etc.

(b) Balanced equations for the conversions are given below:

  1. AlCl3 (aq) + 3NH4OH (aq) ⟶ Al(OH)3 ↓ + 3NH4Cl (aq)

  2. 4NH3 + 5O2 →800°CPt.\xrightarrow[800 \degree \text{C}]{\text{Pt}.} 4NO↑ + 6H2O + Δ
    2NO + O2 ⟶ 2NO2 (brown gas)