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Question

If 5 mL of methane is completely burnt the volume of oxygen required and the volume of CO2 formed under the same conditions are -
  1. 10 mL, 10 mL
  2. 5 mL, 15 mL
  3. 5 mL, 10 mL
  4. 10 mL, 5 mL

A
10 mL, 10 mL
B
5 mL, 10 mL
C
5 mL, 15 mL
D
10 mL, 5 mL
Solution
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The correct option is B

CH4+2O2 CO2+2H2O

One mole of methane will require 2 mole oxygen to produce one mole of
carbon dioxide.
22.4 L of methane will require 44.8 L of oxygen to produce 22.4 L of carbon dioxide.
Hence, 5 ml of methane will require 10 ml oxygen to produce 5 ml.

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