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Solution


Q.

For the following reactions:

Which of the following statements is correct                [2016]
1 (A) is elimination, (B) and (C) are substitution reactions.  
2 (A) is substitution, (B) and (C) are addition reactions.  
3 (A) and (B) are elimination reactions and (C) is addition reaction.  
4 (A) is elimination, (B) is substitution and (C) is addition reaction.  

Ans.

(4)

CH3CH2CH2Br+KOH ⟶ CH3CH=CH2+KBr+H2O

Saturated compound is converted into unsaturated compound by removal of group of atoms hence, it is an elimination reaction.

—Br group is replaced by —OH group hence, it is a substitution reaction.

Addition of Br2 converts an unsaturated compound into a saturated compound hence, it is an addition reaction.