(a)
$NH_{2}^{-}$ withdraws acidic H from active methylene group of $ClCH_{2}COOC_{2}H_{5}$ and it combines with $C_{6}H_{5}COCH_{3}$ to form intermediate that undergoes intramolecular cyclisation
[image:12_image599.emf]
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.