The Language of Chemistry

Short hand representation for the atom of a specific element

• element

• atom

• symbol

The valency of Chlorine in AlCl₃ is

• 1

• 3

• 2

The molecular formula for Ammonium carbonate is

• (NH₄ )₂CO₃

• (NH₄ )CO₃

• (NH₄ )₂CO

Name the elements present in Ammonia

• nitrogen

• hydrogen

• both nitrogen and hydrogen

Most suitable element and most widely accepted standard unit for the measurement of atomic mass

• Oxygen

• Carbon

• Nitrogen

The symbol and valency of ammonium is

• NH₄ , valency is 1

• NH₃, valency is 1

• NH₃ , valency is 2

The atom or group of atom carrying either positive or negative charges are commonly known as

• Cation

• Anion

• Valency

• Radicals

A chemical equation does not provide information about

• Reactants

• Products

• Volumes of reactants and products

• Rates of chemical reaction

The chemical name of the compound Na₂S₂O₃

• Sodium thiosulphate

• Sodium sulphate

• Sodiumdisulphidetrisulphide

• Disodiumsulphideoxide

The charge present on phosphate radical is

• -3

• -4

• -2

• -5