1.

What does natural gas mainly consist of?

A. \[{{C}_{2}}{{H}_{6}}\]         
B.             \[C{{H}_{4}}\]
C.               \[{{C}_{3}}{{H}_{8}}\]        
D.             \[{{C}_{4}}{{H}_{10}}\]
Answer» C.               \[{{C}_{3}}{{H}_{8}}\]        


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