A) \[{{\text{C}}_{\text{3}}}{{\text{H}}_{\text{6}}}\]
B) \[{{C}_{2}}{{H}_{4}}\]
C) \[C{{H}_{4}}\]
D) \[{{C}_{4}}{{H}_{8}}\]
Correct Answer: B
Solution :
| Compound | Molecular weight |
| \[{{C}_{3}}{{H}_{6}}\] | \[12\times 3+6=42\] |
| \[{{C}_{2}}{{H}_{4}}\] | \[12\times 2+4=28\] |
| \[C{{H}_{4}}\] | \[12+4=16\] |
| \[{{C}_{4}}{{H}_{8}}\] | \[12\times 4+8=56\] |
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