Dear Gaurav,
Your question is more general in nature. When you are opening a factory, you are regulated by various Acts, Regulations, Rules such as :
The Industries (Development and Regulation) Act, 1951
Special Economic Zones Act, 2005
Income Tax Act, 1961
Special Economic Zones Rules, 2006
MRTP Act, 1969
MRTP (Amendment) Act, 1991
Competition Act, 2002
Consumer Protection Act, 1986
Standards of Weights and Measures (Packaged Commodities) Rules, 1977
Foreign Contribution (Regulation) Act, 1976
The Environment (Protection) Act, 1986
Public Liability Insurance Act, 1991
The National Green Tribunal Act, 2010
Water (Prevention and Control of Pollution) Cess Act , 1977
Patent Act, 1970.
Prevention of Money Laundering Act, 2002
Payment of Gratuity Act, 1972
Employees' Provident Funds And Miscellaneous
Provisions Act, 1952
Workmen's Compensation Act, 1923
Contract Labour (Regulation and Abolition) Act, 1970
Industrial Disputes Act, 1947
Industrial Employment (Standing Orders) Act, 1946
Factories Act, 1948
and much more........................................................
In your words, you are a CA and CS 'finalist'. So you must have read 'Economic and Labour Laws'. You will get answers of all your questions in that book only. Hence, I am attaching pdf file of that book with this reply. Kindly find it :