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Question

A balanced equation for combustion of methane is given below:
CH4(g)+2O2(g)CO2(g)+2H2O(g)
Which of the following statements is not correct on the basis of the above chemical equation?

A
One mole of CH4 reacts with 2 moles of oxygen to give one mole of CO2 and 2 moles of water.
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B
One molecule of CH4 reacts with 2 molecules of oxygen to give one molecule of CO2 and 2 molecules of water.
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C
22.4 L methane reacts with 44.8L of oxygen to give 44.8L of CO2 and 22.4 L of water
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D
16 g of methane reacts with 64 g of O2 to give 44 g of CO2 and 36 g of water.
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Solution

The correct option is C 22.4 L methane reacts with 44.8L of oxygen to give 44.8L of CO2 and 22.4 L of water
CH4(g)+2O2(g)CO2(g)+2H2O(g)
Since 1 mole methane = 12+4×1=16 g and 2 mole oxygen =2×32=64 g, 1 mole CO2=12+32=44 g and 2 mole water=2×18=36 g
From the balanced reaction: One mole(or 1 molecule or 16 g) of CH4 reacts with 2 moles (or 2 molecules or 64 g) of oxygen to give one mole (or 1 molecule or 44 g) of CO2 and 2 mole (or 2 molecules or 36 g) of water.
For the gaseous system at STP:
22.4 L methane reacts with 44.8 L of oxygen to give 22.4 L of CO2 and 44.8 L of water.

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