The number of valence electrons of an element that is involved in chemical reactions is called the valency of that element. Valency of an element is the measure of combining capacity with other atoms when it forms a chemical compound or molecule.

MEDIUM

Earn 100

${MCl}_{2}$ is the chloride of a metal $M$ . The formula of the sulphate and hydroxide of the metal are _ and _ respectively.

50% studentsanswered this correctly

Important Questions on Separation of Substances

MEDIUM

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

The element ‘X’ has an electronic configuration

2, 8, 3 .

Element ‘Y’ has an electronic configuration

2, 8 7

. The chemical formula of the compound formed when they react is

MEDIUM

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

An element ‘P’ which belongs to

13 th

group of the periodic table and another element ‘Q’ belongs to

16 th

group. The formula of the compound formed if they react with each other is:

MEDIUM

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Write chemical formula of Magnesium Chloride.

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

The formula of calcium hydrogen carbonate is:

MEDIUM

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

The valency of phosphate in

{Na}_{3} {PO}_{4}

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Which amongst the following has +2 valency?

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Formula of a compound formed by

{Fe}^{3 +}

and

{SO}_{4}^{2 -}

is:

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Write the chemical name of

{KClO}_{3}

HARD

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

The formula of a compound formed by

{Ca}^{2 +}

and

O^{2 -}

is:

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Atomic number of potassium is

19

, it has valence electrons:

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Atomic number of fluorine is

9

, it has valence electrons:

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

The number of hydrogen atoms, which combine directly or indirectly with one atom of an element, so as to form a chemical compound is:

MEDIUM

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Formula of a compound formed by M⁺ and X^2- ions, is:

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Write the chemical name of

Mg ({HCO}_{3})_{2}

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

{Na}_{2} {CO}_{3}

is:

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Define valency.

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Write the chemical name of

KClO

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Write the chemical name of

{Na}_{2} {PbO}_{2}

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

The formula of aluminium sulphate is

{Al}_{2} ({SO}_{4})_{3}

. Write the formula of aluminium chloride and aluminium nitride

EASY

Science>Chemistry>Separation of Substances>Formulae of Elements and Compounds

Cotyledons are also called-

MCl2 is the chloride of a metal M. The formula of the sulphate and hydroxide of the metal are _____ and _____ respectively.

Important Questions on Separation of Substances

Learn and Prepare for any exam you want !

${MCl}_{2}$ is the chloride of a metal $M$ . The formula of the sulphate and hydroxide of the metal are _ and _ respectively.