This book is being indispensible for chemical egineering/technology students/graduates over the last two decades needed another updating in view of the fact that better is the enemy of good as well as to keep pace with the changing domain of chemical engineering/technology education in the country and abroad. This objective has been accomplished bt adding about 1500 questions of various types in this edition thereby having over 11000 questions intotal in this book. All these questions have appeared in some examination or another undertaken by chemical engineering diploma, degree and post-graduate students of various polytechnics, Engineering Colleges/Universities, I.I.T.'s, N.I.T.'s, Deemed/Autonomous Universities and Institutes of Chemical Technology