Basically, the salary depends which particular company you are associated with and what all total work ex you are having but the average salary for a fresher should be around 3L but it varies depending upon the organisation. 

Few decent colleges for Chemical Engineering are mentioned below -

Indian Institute of Technology, Bombay

Indian Institute of Technology, Delhi

Indian Institute of Technology, Kharagpur

Indian Institute of Technology, Kanpur

Indian Institute of Technology, Madras

National Institute of Technology, Surathkal

National Institute of Technology, Calicut

National Institute of Technology, Tiruchirappalli

Birla Institute of Technology and Science, Pilani

Delhi Technological University

Anna University etc.

Good Luck!!!