Question 1 :
Which is/are the important raw material(s) required in cement industry?
Question 2 :
Which type of fire extinguisher is used for petroleum fire?
Question 3 :
Which of the following is commonly called a 'polyamide'?
Question 4 :
Epoxy resins are used as
Question 5 :
Detergents used for cleaning clothes and utensils contain?