Question

Copy and complete the following equations:

1. AlN + H₂O →
2. 2NH₃ + 3PbO →
3. NH₃ +3Cl₂ →
4. NH₃ + CO₂ →
   1. Which property of ammonia is illustrated by equation (c)?
   2. What important fertiliser is prepared from equation (d)? State the conditions.

Answer 1

1. AlN + 3H₂O → Al(OH)₃ +NH₃↑
2. 2NH₃ + 3PbO → 3Pb + 3H₂O + N₂
3. When ammonia is in excess,
   2NH3 + 3Cl2 → N2 + 6HC1
   6NH3 + 6HCl → 6NH4Cl
   8NH₃ +3Cl₂ → N₂ + 6NH₄Cl
   When chlorine is in excess,
   NH₃ + 3Cl₂ → 3HCl + NCl3
4. 2NH₃ + CO₂ → NH₂CONH₂ + H₂O
   1. Ammonia acts as a reducing agent, as explained by equation (c).
   2. Urea, the nitrogenous fertiliser, is prepared from equation (d).
      Conditions for urea preparation: High pressure (140-200 atm) and high temperature (170-190°C).