Which of the following compounds has a prochiral methylene group (i.e. the hydrogen atoms are diastereotopic)?
A) propane , CH₃CH₂CH₃
B) cyclopropane , (CH₂)₃
C) 2-methylpropene , CH₂=C(CH₃)₂
D) ethanol , CH₃CH₂OH

'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