Time Left:
600
sec
1. Calcium reacts with water to form:
A. CaO and H₂
B. CaCO₃ and H₂
C. Ca(OH)₂ and H₂
D. CaCl₂ and H₂
2. Magnesium reacts with:
A. Cold water vigorously
B. Hot water slowly
C. Cold water very slowly
D. Steam only
3. Aluminium reacts with steam to produce:
A. Al₂O₃ and H₂
B. Al(OH)₃ and H₂
C. AlCl₃ and H₂
D. Al₂(SO₄)₃ and H₂
4. Which metals do not react with water at all?
A. Zinc and Aluminium
B. Lead, Copper, Silver, Gold
C. Iron and Copper
D. Sodium and Potassium
5. Which gas is evolved when metals react with dilute acids?
A. Oxygen
B. Carbon dioxide
C. Hydrogen
D. Nitrogen
6. Which acid does not generally produce hydrogen gas when reacting with metals?
A. Hydrochloric acid
B. Nitric acid
C. Sulphuric acid
D. Acetic acid
7. The reactivity of metals with dilute acids decreases in the order:
A. Mg > Zn > Fe > Al
B. Zn > Mg > Fe > Al
C. Mg > Al > Zn > Fe
D. Al > Mg > Fe > Zn
8. Aqua regia is a mixture of:
A. HCl and H₂SO₄ (3:1)
B. HNO₃ and H₂SO₄ (3:1)
C. HCl and HNO₃ (3:1)
D. HCl and HNO₃ (1:3)
9. Which acid mixture can dissolve gold?
A. HCl + H₂SO₄
B. HCl + HNO₃
C. H₂SO₄ + HNO₃
D. H₂SO₄ + H₃PO₄
10. In displacement reactions, a more reactive metal:
A. Forms oxides
B. Displaces less reactive metal from salt solution
C. Converts into ions
D. Becomes noble
11. Iron nail placed in copper sulphate solution becomes coated with:
A. Zinc
B. Iron
C. Copper
D. Aluminium
12. The most reactive metal in the reactivity series is:
A. Calcium
B. Potassium
C. Sodium
D. Aluminium
13. Which metals do not react with oxygen even at high temperature?
A. Iron and Copper
B. Silver and Gold
C. Aluminium and Zinc
D. Lead and Mercury
14. Metals like sodium and potassium are kept in kerosene to prevent:
A. Melting
B. Oxidation
C. Electrical conduction
D. Ductility loss
15. Ionic compounds have:
A. Low melting points
B. High melting and boiling points
C. No definite melting point
D. Low boiling points
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