Time Left:
600
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1. Formula of magnesium chloride is
A. MgCl
B. MgCl₂
C. Mg₂Cl
D. Mg₂Cl₃
2. Formula of calcium oxide is
A. CaO
B. CaO₂
C. Ca₂O
D. Ca₂O₃
3. Formula of sodium nitrate is
A. NaNO₃
B. Na₂NO₃
C. Na₂N₂O₆
D. NaNO₂
4. Formula of calcium hydroxide is
A. CaOH₂
B. Ca(OH)₂
C. Ca₂OH
D. Ca₂(OH)₃
5. Formula of aluminium oxide is
A. AlO₂
B. Al₂O₃
C. AlO₃
D. Al₃O₂
6. Formula of ammonium sulphate is
A. (NH₄)SO₄
B. (NH₄)₂SO₄
C. NH₄SO₄
D. NH₂SO₄
7. Formula of sodium carbonate is
A. NaCO₃
B. Na₂CO₃
C. Na₃CO₃
D. Na₂C₂O₃
8. The molecular mass of water is
A. 16 u
B. 17 u
C. 18 u
D. 20 u
9. Molecular mass of HNO₃ is
A. 60 u
B. 61 u
C. 62 u
D. 63 u
11. Formula unit mass of CaCl₂ is
A. 110 u
B. 111 u
C. 112 u
D. 113 u
12. Polyatomic ions contain
A. Single atom
B. Group of atoms with charge
C. Neutral atoms
D. Molecules only
13. Hydroxide ion symbol is
A. HO
B. OH
C. OH⁻
D. HO₂⁻
14. Nitrate ion is represented as
A. NO₂⁻
B. NO₃⁻
C. NO₃²⁻
D. N₂O₃
15. Carbonate ion has charge
A. 1⁺
B. 2⁺
C. 1⁻
D. 2⁻
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