Reaction mechanism in Organic Chemistry by Parmar Chawla Price Rs 135 Principles of Reaction Mechanism in Organic Chemistry (Paperback) by H M Chawla V S Parmar Publisher: Sultan Chand & Sons (2004) Price: Rs. 135 (Prices are inclusive of all taxes) Free Shipping if total order amount is Rs. 200 or above.Add Rs. 30 otherwise. Book Reviews of Principles of Reaction Mechanism in Organic Chemistry