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ICSE Class 8 Chemistry Question 16 of 17

Carbon & Its Compounds — Question 3

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Question

Question 3

Give a balanced equation for the following conversions: [In one or two steps]

  1. Coke to water gas.

  2. Calcium bicarbonate to calcium nitrate using a dilute acid

  3. Lime water [soln. of calcium hydroxide] to calcium bicarbonate.

  4. Carbon dioxide to carbon.

  5. A metallic oxide to calcium carbonate.

Answer

  1. Ccoke+H2Osteam→1000°C[CO+H2]water gas−Δ\underset{\text{coke}}{\text{C}} + \underset{\text{steam}}{\text{H}_2\text{O}} \xrightarrow{1000 \degree \text{C}} \underset{\text{water gas}}{[\text{CO} + \text{H}_2 ]} - \Delta

  2. Ca(HCO3)2 calcium bicarbonate+2HNO3Dil acid⟶Ca(NO3)2+2CO2+2H2O\underset{\text{ calcium bicarbonate} }{\text{Ca}\text{(HCO}_3)_2} + \underset{\text{Dil acid}}{2\text{HNO}_3} \longrightarrow \text{Ca(NO}_3)_2 + 2\text{CO}_2 + 2\text{H}_2\text{O}

  3. Ca(OH)2 + CO2 ⟶ CaCO3 ↓ + H2O
    CaCO3 + H2O + CO2 ⟶ Ca(HCO3)2

  4. CO2 + 2Mg ⟶ 2MgO + C

  5. Na2O + CO2 ⟶ Na2CO3