Explore topic-wise MCQs in Chemistry.

This section includes 9 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

Which of the following metals is not extracted by electrolysis?

A. Na
B. Mg
C. Al
D. Fe
Answer» E.
Discussion
2.

How is ore-dressing of iron done?

A. Froth Flotation
B. Magnetic separation
C. Hand picking
D. By wetting
Answer» C. Hand picking
Discussion
3.

What is the main reaction occurring in the blast furnace during extraction of iron from haematite?

A. Fe<sub>2</sub>O<sub>3</sub> + 3CO 2Fe + 3CO<sub>2</sub>
B. FeO + SiO<sub>2</sub> FeSiO<sub>2</sub>
C. Fe<sub>2</sub>O<sub>3</sub> + 3C 2Fe + 3CO
D. Fe<sub>2</sub>O<sub>3</sub> + CO<sub>2</sub> FeCO<sub>3</sub> + O<sub>2</sub>
Answer» B. FeO + SiO<sub>2</sub> FeSiO<sub>2</sub>
Discussion
4.

Copper is extracted from low grade copper ores.

A. True
B. False
Answer» B. False
Discussion
5.

Which of the following ores are concentrated by froth flotation?

A. Haematite
B. Zinc
C. Copper pyrites
D. Magnetite
Answer» D. Magnetite
Discussion
6.

Roasting results in the formation of oxides. But why are oxide ores are subjected to roasting?

A. To avoid gangue particles
B. To get crude metal with using oxidizing agent
C. To remove volatile impurities in the form of their oxides
D. To make the ore porous
Answer» D. To make the ore porous
Discussion
7.

When is the ore subjected to leach?

A. When the ore is in immiscible liquid
B. When the impurity is in immiscible liquid
C. When both ore and impurity are insoluble in water
D. When only impurity is soluble in water
Answer» D. When only impurity is soluble in water
Discussion
8.

A metal found in a free state is called nugget.

A. True
B. False
Answer» B. False
Discussion
9.

What is the type of metallurgy in which the ore is leached and the metal is collected by using electrolysis?

A. Zone refining
B. Hydrometallurgy
C. Liquation
D. Thermite process
Answer» C. Liquation
Discussion