which is to develop myself as a well trained chemical engineer and establish a career in the chemical industry
Think about it once. What is "a well trained chemical engineer?"
Don't you think it is a vague term.
Therefore, it's good to name a proper profession. Chemical engineering is a broad field encompassing a host of professions. What do YOU want to be?
My constant desire to learn, explore, and experiment has been instrumental in sparkling an interest in me for graduate study.
I'm sure you have better reasons than these for pursuing your studies. Do some thinking and you will soon realise why you want to study.
During my school days, we had many subjects ranging from history.... chemistry in my 12th board examination and scored overall 90%.
I think it's better to avoid talking about school level studies in a grad school essay. Concentrate on college.
After clearing the entrance exam, I got admit into one of the best chemical colleges in India - Sardar Vallabhbhai National Institute of Technology (SVNIT), Surat.
This sentence is not needed because your CV will carry these details. Right now it is just a repetition.
This was an alternative .... short duration and the quantity of PMMA required was and product were studied by Infra red spectroscopy.
When you describe these things, they should be in a language understood by laymen. Some universities ask that directly and some don't, but I think it's always better to keep the jargon out.
Your conclusion could do with one more sentence.