51. Which chemical is commonly used as a feedstock for the production of polyvinyl chloride (PVC)?
a) Ethylene
b) Propylene
c) Vinyl chloride monomer (VCM)
d) Benzene
Answer: c) Vinyl chloride monomer (VCM)
52. Which Indian city is known for its petrochemical and refinery complexes?
a) Visakhapatnam
b) Hyderabad
c) Jaipur
d) Lucknow
Answer: a) Visakhapatnam
53. Which chemical is commonly used as a stabilizer in the production of plastic products?
a) Lead
b) Cadmium
c) Mercury
d) Phthalates
Answer: d) Phthalates
54. Which petrochemical is used in the production of polyethylene terephthalate (PET)?
a) Ethylene
b) Propylene
c) Terephthalic acid (TPA)
d) Benzene
Answer: c) Terephthalic acid (TPA)
55. Which chemical is commonly used as a reducing agent in photography?
a) Sodium hypochlorite
b) Hydrogen peroxide
c) Sodium sulfite
d) Sodium carbonate
Answer: c) Sodium sulfite
