Question

The number of a bonds formed between two carbon atoms in C2H6. C2H4 and C2H2 are respectively are
1) 1,1, 1 2)1, 2, 3 3) 7, 6, 5 4) 3,2, 1

Answer 1

ethane has 1 bond,ethene has 2 bonds and ethyne has 3 bonds .So answer is 2) 123