1.

Which one of the following is the correct order according to the increasing sequence of molecular weights of hydrocarbons?

A. methane, ethane, propane and butane
B. propane, butane, ethane and methane
C. butane,ethane,propane and butane
D. butane, propane, ethane and methane
Answer» B. propane, butane, ethane and methane


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