Question

An element ‘X’ is forming an acidic oxide. Its position in modern periodic table will be:

• A. acidic oxides
• B. Group 2 and Period 3
• C. Group 13 and Period 3
• D. Group 16 and Period 3

Answer 1

The correct option is D

Group 16 and Period 3

The explanation for the correct option:

(D) Acidic oxides: The oxides which furnish an acid on dissolution in water are called acidic oxides. Examples: Oxides of non-metals

• Non-metals form acidic oxides and are placed in group 16 of all the periods of the modern periodic table.
• Examples: Oxides of Sulphur
• The group 16 elements of the modern periodic table consist of 5 elements oxygen, sulfur, selenium, tellurium, and polonium.

The explanation for the incorrect options:

(A) Group 1 and Period 3: It is an alkali metal and its oxide is basic in nature. Basic oxides furnish a base on dissolution in water.

(B) Group 2 and Period 3: It is an alkaline earth metal. This oxide is also basic in nature due to its metallic characteristics.

(C) Group 13 and Period 3: Aluminium forms amphoteric oxides i.e.; oxides that behave both as an acid and a base.

Hence, option (D) is correct.