Which of the following organohalogen compounds when heated witj alcoholic potassium hydroxide does not undergo dehydrohalogenation reaction

a)sec butyl chloride\

b)Iso propyl chloride

c)Neo pentyl chlordie

d)Iso butyl chloride

'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