71. Nitric acid is used in manufacturing:
A) Explosives
B) Fertilizers
C) Dyes
D) All of these
Answer: D
72. TNT is an example of:
A) Polymer
B) Explosive
C) Fertilizer
D) Fuel
Answer: B
73. Ethanol is produced industrially by:
A) Fermentation
B) Distillation
C) Oxidation
D) Reduction
Answer: A
74. Methanol is produced from:
A) Wood
B) Synthesis gas
C) Coal tar
D) Petroleum only
Answer: B
75. Synthetic rubber is made from:
A) Isoprene
B) Butadiene
C) Ethene
D) Methane
Answer: B
76. Vulcanization improves rubber by:
A) Softening
B) Hardening
C) Adding sulfur
D) Removing impurities
Answer: C
77. Paints are composed of:
A) Pigment
B) Binder
C) Solvent
D) All of these
Answer: D
78. Pigments provide:
A) Strength
B) Color
C) Flexibility
D) Gloss
Answer: B
79. Which solvent is commonly used in paints?
A) Water
B) Turpentine
C) Alcohol
D) Acid
Answer: B
80. Ceramics are made by heating:
A) Metals
B) Clay
C) Plastics
D) Wood
Answer: B