Explore topic-wise MCQs in Chemistry.

This section includes 10 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.

1.

What is formed when amphoteric oxides react with an alkali solution?

A. Salt only
B. No reaction
C. Acid
D. Salt and water
Answer» E.
Discussion
2.

Which of the following metals does not react with hot water to form an oxide?

A. Calcium
B. Magnesium
C. Iron
D. Lithium
Answer» D. Lithium
Discussion
3.

Which of the following processes involves heating a carbonate ore to form metal oxide?

A. Leaching
B. Smelting
C. Ore Reduction
D. Calcination
Answer» E.
Discussion
4.

What product is formed when iron metal is dipped into concentrated nitric acid?

A. Iron (III) nitrate + NO2
B. Iron (II) nitrate + NO
C. Iron (III) oxide
D. Iron (III) nitrite
Answer» D. Iron (III) nitrite
Discussion
5.

Before subjecting Mg ribbons to flame, it is rubbed with sandpaper. Why?

A. To increase surface area for combustion
B. To increase roughness of surface
C. To remove oxide layer
D. To remove moisture
Answer» D. To remove moisture
Discussion
6.

What is the primary constituent of sand?

A. Silicon tetroxide
B. Silica
C. Silicon
D. Feldspar
Answer» C. Silicon
Discussion
7.

What is the starting substance fed into the electrolytic cell in Hall-Heroult process?

A. Cryolite
B. Sodium hydroxide
C. Aluminum hydroxide
D. Alumina
Answer» E.
Discussion
8.

Which of the following can classified as an amphoteric oxide?

A. Iron (III) oxide
B. Zinc oxide
C. Mercury (II) oxide
D. Lime
Answer» C. Mercury (II) oxide
Discussion
9.

What type of oxides is formed by non-metals?

A. Oxides with pH <=7
B. Amphoteric oxides
C. Oxides with pH > 7
D. Oxides which are acidic
Answer» E.
Discussion
10.

What type of oxides is formed by metals?

A. Oxides with pH = 7
B. Oxides with pH > -log10[1 x 10-7]
C. Oxides with pH <= -log10[1 x 10-7]
D. Amphoteric oxides
Answer» C. Oxides with pH <= -log10[1 x 10-7]
Discussion