LANGUAGE OF CHEMISTRY

Calculate the percentage composition of Calcium in Calcium Chloride(Ca=40, Cl=35.5)

• 36

• 35

• 34

• 33

Give the chemical formula of Sodium Zincate

• NaZNO₂

• Na₂ZnO₂

• Na₂O

• NaZnO₃

Give the chemical name of Ca₃N₂

• Calcium Nitrate

• Calcium Nitrite

• Calcium Nitride

• None of the above

What is the valency of Sulphite

• -1

• +1

• -2

• -3

What is the formula of ammonium radical

• NH₃

• NH

• NH₃⁺

• NH₄⁺

The formula of the nitrate of metal X is XNO₃. What is the formula of its hydroxide.

• X₂H

• XOH

• X₂O

• X(OH)₂

MCl₂ is the chloride of the metal M. Give the formula of its sulphate.

• M₂S

• M₂SO₃

• MSO₄

• MSO₃

Calculate the relative molecular mass of NH₄Cl(N=14, H=1, Cl=35.5)

• 54.0

• 52.5

• 53.5

• 51.5

Give the chemical formula of blue vitriol

• FeSO₄.7H₂O

• CuSO₄.5H₂O

• CaSO₄.2H₂O

• Na₂SO₄.10H₂O

Give the chemical name of Mg(HCO₃)₂

• Manganese Carbonate

• Magnesium Carbonate

• Maganese Bicarbonate

• Magnesium Bicarbonate