Chemical & Petrochemical Sector

71. Which chemical is commonly used as a disinfectant in water treatment?
a) Chlorine
b) Bromine
c) Iodine
d) Ozone

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

73. Which chemical is commonly used as a fertilizer in agriculture?
a) Urea
b) Ammonium nitrate
c) Potassium chloride
d) Phosphoric acid

74. Which petrochemical is used in the production of polystyrene?
a) Ethylene
b) Propylene
c) Styrene
d) Benzene

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