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ICSE Class 10 Chemistry Question 8 of 23

Solved 2025 Specimen Paper ICSE Class 10 Chemistry — Question 12

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12
Question

Question 1(xii)

The ratio between the volumes occupied by 4.4 grams of carbon dioxide and 2 grams of hydrogen gas is:

  1. 2.2 : 1
  2. 1 : 2.2
  3. 1 : 10
  4. 10 : 1
Answer

1 : 10

Reason —

Molar mass of CO2 = 12 + 2 x 16 = 44 g/mole

∴ Moles of 4.4g CO2 = 0.1

Molar mass of H2 = 2 x 1 = 2 g/mole

∴ Moles of 2g H2 = 1

Under the same conditions of temperature and pressure, the volume of a gas is directly proportional to the number of moles. Therefore, the volume ratio will be the same as the mole ratio.

Volume ratio = Vol. of CO2Vol. of H2\dfrac{\text{Vol. of CO}_2}{\text{Vol. of H}_2} = 0.11\dfrac{0.1}{1} = 1 : 10