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Question

The gas which contributes maximum to the heating value of natural gas is:
  1. H2
  2. CH4
  3. CO2
  4. CO

A
CO2
B
CO
C
CH4
D
H2
Solution
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Natural gas consists of a high percentage of methane (generally above 85 percent) and varying amounts of ethane, propane, butane, and inert gases (typically nitrogen, carbon dioxide, and helium). So, CH4 contributes the maximum to the heating value of natural gas.

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