Question

which of the structures are impossible ,give the numbers of bonds that various atoms can form? (a)CH3CH3 CH3 (b)CH3CH=CH2CH2CH3 (c)CH3NHCH3 (d)CH3CCl=CCH2CH3 (e)(CH3)3 CHCH(CH3)2 (f)CH3CHO

Answer 1

I suggest you draw these structures on a sheet of paper and check the bonds. C may have 4, N may have 3 and O may have 2.
a is impossible but there are two others that won't work, also.