Oxygen - Free Chemistry Quiz with Answers

Report a mistake in the quiz

If you would like to tell us that you find a mistake, feel free to let us know :)

What do you know about chemical element oxygen? Answer the following questions about chemical and physical properties of oxygen in this free Chemistry quiz with multiple choice questions.

Question 1:

What is the chemical symbol of oxygen? (first letter of a chemical symbol is always in uppercase)

1 b

Question 2:

How many protons does oxygen have?

A) 2

B) 4

C) 6

D) 8

1 b

Question 3:

In the periodic table of chemical elements, this element oxygen is located in what group/family of elements?

A) The group called chalcogens or non-metal elements.

B) The group called halogens or metalloid elements.

C) The group called chalcogens or noble gas elements.

D) The group called halogens or noble gas elements.

1 b

Question 4:

To which block of elements does this gas belong to?

A) s-block elements

B) p-block elements

C) d-block elements

D) f-block elements

1 b

Question 5:

When it comes to valence electrons of atoms of oxygen and its ability to form bonds, true statement is that

A) Oxygen atoms have 2 valence electrons and therefore they can form 6 covalent bonds.

B) Oxygen atoms have 8 valence electrons and therefore they can form 8 covalent bonds.

C) Oxygen atoms have 4 valence electrons and therefore they can form 4 covalent bonds.

D) Oxygen atoms have 6 valence electrons and therefore they can form 2 covalent bonds.

1 b

Question 6:

How much oxygen is there in the air of Earth's atmosphere?

A) 14 %

B) 17 %

C) 19 %

D) 21%

1 b

Question 7:

What is the name of the molecule made up of three atoms of oxygen which forms a protective layer in the Earth's stratosphere?

1 b

Question 8:

What is the name of the chemical compounds with one or more oxygen atoms combined with a/an atom/molecule of another element? (plural)

1 b

Question 9:

Choose the correct statement about chemical/physical properties of oxygen:

A) Oxygen is well soluble in water, it has no taste and smell.

B) Oxygen is lighter than air.

C) Molecule made up of three atoms of oxygen has green shade.

D) Oxygen is heavier than air, has no smell but bitter taste.

1 b

Question 10:

Which statement about reactivity of oxygen and its other properties is as the only one false?

A) Oxygen is not compressible and therefore used in the medicine only in liquid state.

B) Molecules of oxygen are very reactive.

C) Reactions of molecules of oxygen are exothermic.

D) Molecule of three atoms of oxygen can be used as a disinfectant.

1 b