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- 1. Multiple Choice
Which statement is correct?
Cu reacts with steam to liberate hydrogen
Magnesium is more reactive than calcium
Potassium reacts with water to form hydrogen gas
Sodium oxide can be reduced by carbon to form sodium
- 2. Multiple Choice
Which substances do not react together?
Zinc and dilute HCl
Cu and dilute HCl
Na and water
Ca and water
- 3. Multiple Choice
Oxide of element X can be reduced by carbon. But element X does not react with steam or dilute HCl . What is X?
Cu
Mg
Zn
Fe
- 4. Fill in the Blank
Potassium nitrate decomposes to form potassium nitrite and ....................................gas
- 5. Multiple Choice
Lithium nitrate decomposes to form which gas?
Oxygen
Nitrogen
Nitrogen di oxide
Water vapor
- 6. Multiple Choice
Zinc blend is heated in oxygen to form
Zinc sulphide
Carbon
Zinc oxide and carbon di oxide
Sulphur di oxide and zinc oxide
- 7. Multiple Choice
The compound used to remove silica from blast furnace in extraction of iron is
SiO2
CaSiO3
CaCO3 or Lime stone
oxygen
- 8. Multiple Choice
Aluminium is used to make aircraft bodies as it is
Soft
Lightweight and strong
Unreactive oxide layer
Has high density
- 9. Multiple Choice
Brass is an alloy of
70% Zn and 30% Cu
60% Zn and 40% Cu
70% Cu and 30% Zn
40% Sn and 60% Cu
- 10. Fill in the Blank
Steel making occurs in BOC which is
- 11. Multiple Choice
Fe2O3 can be reduced to Fe by reacting it with:
Cu
Ag
Oxygen
Aluminum
- 12. Multiple Choice
Thermal decomposition of metal hydroxides produces
Metal oxide and water
Metal oxide and hydrogen
Metal and water
Metal and hydrogen
- 13. Multiple Choice
Silver nitrate on decomposition forms
Silver oxide and NO2
Silver and NO2
Silver, NO and O2
Silver, NO2 and O2
- 14. Multiple Choice
Stability of carbonates of group 2 elements ............down the group.
Remains same
Decreases
Increases
First increases then decreases
- 15. Multiple Choice
In reaction of copper sulphate with Zn ,...............ions are reduced
Zn^2+
Cu^2+
SO4^2-
Cu
- 16. Multiple Choice
A metal that reacts slowly with cold water but rapidly with steam
Na
Mg
K
Ca
- 17. Multiple Choice
Solder is an alloy of
Copper and lead
copper and zinc
Tin and lead
Tin and Zinc
- 18. Fill in the Blank
Alloy of nickel and titanium is called nitinol. It has a special property called
- 19. Multiple Choice
Pure metals are malleable as atoms are arranged
in regular layers
in irregular layers
in molecules
in independent small domains
- 20. Multiple Choice
Metals react with water to form
Metal oxide and hydrogen
Metal hydroxide and vapour
Metal hydroxide and hydrogen
Metal hydroxide only
- 21. Multiple Choice
Carbon is used as a reducing agent to extract which metal from its oxide?
Na
Fe
Ca
Mg
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