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ICSE Class 10 Chemistry Question 80 of 93

Organic Chemistry — Question 80

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80
Question

Question 5(2019)

Arrange - Ethane, methane, ethene, ethyne - in increasing order of molecular weight [H = 1, C = 12]

Answer

Ethane [C2H6] : M.W. = 2[12] + 6[1] = 30

Methane [CH4] : M.W. = 12 + 4[1] = 16

Ethene [C2H4] : M.W. = 2[12] + 4[1] = 28

Ethyne [C2H2] : M.W. = 2[12] + 2[1] = 26

Hence, increasing order of molecular weight :

Methane < Ethyne < Ethene < Ethane