HI,

SEE iits bombay, delhi, madras, kanpur, bhubaneswar dont offer any specialization in chemical engineering, you need to do mtech in chemical engineering from mentioned iits.

now iit roorkwe has specialization of

Computer Aided Process Plant Design ,

Industrial Pollution Abatement.

iit guwahati  has specialization of

Petroleum Science and Technology ,

Materials Science and Technology.

another good college is Institute of chemical engineering mumbai offers dyestuff technology.

since you are interested in pharmaceutical industry you should go for,

dyestuff technology.

Materials Science and Technology.