Which of the following compounds does not have a planar molecular configuration?
A) H₂C=CH₂
B) H₂C=CH–C≡CH
C) H₂C=C=CH₂
D) H₂C=C=C=CH₂

'x' gm of a compound A3B2C5 contains 'y' gm of A atoms

 

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how to represent the possible fischer projections for 2-bromohexane