250+ TOP MCQs on Inorganic Chemical – Sulfur and Answers

Chemical Industry Multiple Choice Questions on “norganic Chemical – Sulfur”.

1. Which of the mentioned is the basic raw material for the production of sulfur?
a) CaO
b) Asbestos
c) Lead
d) Sulfur

Answer: d
Clarification: Sulfur is one of the basic raw materials for the production of sulfuric acid.

2. What is the atomic weight of sulfur approximately?
a) 30
b) 31
c) 32
d) 33

Answer: d
Clarification: The atomic weight of sulfur is approximately 32.

3. What is the melting point of Rhombic crystal sulfur?
a) 111.8 Celsius
b) 112.8 Celsius
c) 113.8 Celsius
d) 114.8 Celsius

Answer: b
Clarification: The melting point of Rhombic crystal sulfur is 112.8.

4. What are iron pyrites also know as?
a) Sulfides of iron
b) Silicates of Alumina
c) Aluminates of Magnesium
d) Sulfides of Calcium

Answer: a
Clarification: Iron pyrites has chemical formula FeS that is Sulfides of Iron.

5. What is the melting point of monoclinic crystals of sulfur?
a) 116 Celsius
b) 117 Celsius
c) 118 Celsius
d) 119 Celsius

Answer: d
Clarification: Melting point of the monoclinic sulfur crystals is 119 Celsius.

6. What is the chemical formula of Oleum?
a) H₂S₂O₇
b) H₂S₂O₈
c) H₂S₂O₉
d) H₂S₂O₁₀

Answer: a
Clarification: Chemical formula of Oleum is H₂SO₄ + SO₃, which is H₂S₂O₇.

7. To what size are the particles ground for an economic balance between heat transfer rate from combustion gases plus residence time?
a) 200 mesh
b) 100 mesh
c) 50 mesh
d) 18 mesh

Answer: a
Clarification: The particle size range of 200 mesh was found to be an economic balance between heat transfer rate from combustion gases plus residence time, as dictated by rate of fall of particles, tower height, and grinding costs.

8. In cold stage catalytic reaction which catalyst is used to catalyze H₂S + SO₂ to produce S₆ vapor?
a) Bauxite
b) Zirconium
c) Molybdenum
d) Aluminum oxide

Answer: d
Clarification: Aluminum oxide catalyzes the H₂S + SO₂ reaction to produce S₆ vapor.

9. If the sulfur contains Arsenic which attacks the Vanadium or Platinum catalyst during contact process. Using which of the following can the Arsenic be removed.
a) Milk of lime
b) Milk of magnesia
c) CaO
d) Salts of Sodium

Answer: a
Clarification: Arsenic in the sulfur can be removed by contacting molten sulfur with milk of lime.

10. What percentage of SiO₂ is present in Indian pyrite ore?
a) 5-7%
b) 10-12%
c) 16-19%
d) 20-21%

Answer: a
Clarification: Indian pyrite ore at Amjhore contains 5-7% of SiO₂ and requires either floatation initially or extra limestone to flux out the silica.