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 happens when an atom of oxygen is subjected to external magnetic field?

A. It is weakly attracted and loses magnetism on removal of field
B. It is weakly attracted and does not lose magnetism on removal of field
C. It is weakly attracted and domains align themselves in the direction of field
D. It is not attracted
Answer» B. It is weakly attracted and does not lose magnetism on removal of field
Discussion
2.

Which is the most electronegative atom amongst the following?

A. Oxygen
B. Fluorine
C. Nitrogen
D. Chlorine
Answer» C. Nitrogen
Discussion
3.

What is the nature of zinc oxide?

A. Acidic
B. Amphoteric
C. Basic
D. Undetermined
Answer» C. Basic
Discussion
4.

What will be the products of the reaction C2H4 + 2O2 ?

A. CO and H<sub>2</sub>O
B. CO<sub>2</sub> and H<sub>2</sub>O<sub>2</sub>
C. Co and H<sub>2</sub>O
D. CO<sub>2</sub> and H<sub>2</sub>O
Answer» E.
Discussion
5.

Which of the following in air, forms compounds readily?

A. Nitrogen
B. Oxygen
C. Sulfur
D. Carbon
Answer» C. Sulfur
Discussion
6.

Marine life is more comfortable in warm water than cold water. True or false?

A. True
B. False
Answer» C.
Discussion
7.

Why does aluminum not degrade in nature quickly?

A. It reacts at low temperature
B. It has an octet configuration
C. It has a tough oxide layer
D. It is an electronegative element
Answer» D. It is an electronegative element
Discussion
8.

What is the most stable oxidation state of the oxygen atom?

A. +1
B. -1
C. -2
D. +2
Answer» D. +2
Discussion
9.

What is the source of obtaining oxygen industrially?

A. Metallic ores
B. Air
C. Oxygen furnace
D. Organic compounds
Answer» C. Oxygen furnace
Discussion
10.

Which of the following is the most abundant non-metal in the Earth s crust?

A. Oxygen
B. Silicon
C. Hydrogen
D. Water
Answer» B. Silicon
Discussion