Which of the following is an endothermic reaction?
A. Absorption of SO3 in 98% H2SO4
B. C + H2O = CO + H2
C. Thermal dissociation of iron pyrites
D. Both B and C
Answer: Option D
A. Absorption of SO3 in 98% H2SO4
B. C + H2O = CO + H2
C. Thermal dissociation of iron pyrites
D. Both B and C
Answer: Option D
A mixture of chlorine & sodium bromide acts as a/an
A. Insecticides
B. Analgesic drug
C. Fire retardant
D. Hydrogenation catalyst
__________ are used as corrosion inhibitor for iron & steel in aqueous solutions.
A. Phosphates
B. Chromates
C. Sulphates
D. Bi-carbonates
Hydrazine (N2H4) is used mainly as a/an
A. Explosive
B. Rocket fuel
C. Detergents additive
D. None of these
Common salt is generally not produced commonly by __________ method from brine.
A. Freeze drying
B. Electrolytic
C. Solar evaporation
D. Vacuum evaporation
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