71. Which chemical is commonly used as a disinfectant in water treatment?
a) Chlorine
b) Bromine
c) Iodine
d) Ozone
Answer: a) Chlorine
72. Which Indian company is the largest producer of caustic soda?
a) Tata Chemicals
b) Gujarat Alkalies and Chemicals Limited (GACL)
c) Grasim Industries Limited
d) Aditya Birla Chemicals
Answer: b) Gujarat Alkalies and Chemicals Limited (GACL)
73. Which chemical is commonly used as a fertilizer in agriculture?
a) Urea
b) Ammonium nitrate
c) Potassium chloride
d) Phosphoric acid
Answer: a) Urea
74. Which petrochemical is used in the production of polystyrene?
a) Ethylene
b) Propylene
c) Styrene
d) Benzene
Answer: c) Styrene
75. Which chemical is commonly used as a thickening agent in personal care products?
a) Carbomer
b) Xanthan gum
c) Sodium alginate
d) Cellulose gum
Answer: a) Carbomer
