How can I get admission in U.S.A for M.Tech chemical engineering?

Hi, You have to complete your B.Tech with a higher first class preferably and take the GRE, a score of 320 and above is highly recommended for the top-ranked universities. A TOEFL score would be required as well.

There is no M.Tech in USA. It is called MS there, attempt GRE and TOEFL make your CV strong, then apply for the Universities in USA. All the best.