Institute of Chemical Technology, Mumbai

I think no. For the year 2016, the government carried out admission by MHTCET as well as JEE Mains. 70% admissions of the total seats were carried out through MHTCET and the remaining 30% were done by JEE Mains.
A separate form is to be filled for admission through JEE Mains. Then the college puts up a merit list according to the scores in Mains and then a counselling round is done for filling up the 30% seats in each branch.

Food technology being a matured branch in India where a startup would be the right idea in my opinion. Or else one can work in a food processing company at the outset and learn all design and operational aspects. Placement-wise, ICT is very popular.

Yes, the forms are available online.
For admission details refer:
https://www.shiksha.com/b-tech/course/b-tech-in-food-engineering-and-technology-institute-of-chemical-technology-ict-matunga-east-mumbai-184387

You can get admission with both PCM and PCB percentage, whichever is higher. But there is around 3% relaxation for PCBM students.

https://www.shiksha.com/b-tech/resources/mhcet-college-predictor
Kindly visit this link.

You could get admission is those colleges but, according to your grades. you could do even better than this. You must try once more and hopefully, you will get admitted in top 50 colleges in India.

Follow the links below:
https://www.shiksha.com/b-tech/resources/jee-main-rank-predictor
Also refer:
https://www.shiksha.com/b-tech/resources/jee-mains-college-predictor