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ICSE Class 10 Chemistry Question 4 of 18

Solved 2020 Question Paper ICSE Class 10 Chemistry — Question 7

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7
Question

Question 1(c)

Write a balanced chemical equation for each of the following:

(i) Reaction of carbon powder and concentrated nitric acid.

(ii) Reaction of excess ammonia with chlorine.

(iii) Reaction of lead nitrate solution with ammonium hydroxide.

(iv) Producing ethane from bromo ethane using Zn/Cu couple in alcohol.

(v) Complete combustion of ethane.

Answer

(i) C + 4HNO3 [conc.]⟶ CO2 + 2H2O + 4NO2

(ii) 8NH3 [excess] + 3Cl2 ⟶ 6NH4Cl + N2

(iii) Pb(NO3)2 + 2NH4OH ⟶ 2NH4NO3 + Pb(OH)2 ↓

(iv) C2H5Brbromoethane+2[H]nascent hydrogen→alcoholZn/Cu coupleC2H6ethane+HBr\underset{\text{bromoethane}}{\text{C}_2\text{H}_5\text{Br}} + \underset{\text{nascent hydrogen}}{2\text{[H]}} \xrightarrow[\text{alcohol}]{\text{Zn/Cu couple}} \underset{\text{ethane}}{\text{C}_2\text{H}_6} +\text{HBr}

(v) 2C2H6 + 7O2 [excess] ⟶ 4CO2 + 6H2O + Δ