ICSE ICSE Class 8 - CISCE Question Bank Solutions for Chemistry

Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Mercury
write symbol with the variable valency

Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
write symbol with the variable valency

Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Tin
write symbol with the variable valency

Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Lead
write symbol with the variable valency

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Chloride

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Bromide

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Iodide

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Nitrate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Hydroxide

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Bicarbonate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Bisulphite

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Bisulphate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Aluminate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Permanganate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Oxide

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Sulphide

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Sulphite

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Sulphate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Carbonate

State whether the following ion or radical given below of a non-metallic element exhibits valency: 1^–, 2^– or 3^–. (write the ion or radical with the correct valency).

Dichromate