class IX chapter 3

Atomicity of sulphur molecule is

• 3

• 8

• 2

• 4

Latin name of silver is

• Aurum

• Ferrum

• Argentum

• Natrium

Law of conservation of mass was stated by

• Lavoisier

• Rutherford

• Dalton

• Proust

Identify the molecule of compound from the following

• Oxygen

• Phosphorous

• Sulphuric acid

• Ozone

Which one of the following is a polyatomic ion?

• Iodide

• Oxide

• Phosphate

• Sulphide

The valency of magnesium is

• 1

• 2

• 3

• 4

The correct formula of calcium chloride is

• CaCl

• CaCl2

• Ca2Cl

• CaCl3

Symbol of Cobalt is

• C

• CO

• Co

• Cl

Molecular mass of water is equal to

• 18 u

• 16 u

• 12 u

• 14 u

Identify the element which has more than one valency

• Na

• Zn

• Cu

• Al