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- 1. Multiple Choice
Which one of the following gas burns with the "pop" sound?
Oxygen
Hydrogen
Chlorine
Hydrogen Sulphide
- 2. Multiple Choice
MgO +H2O =
MgOH
Mg2O
Mg(OH)2
Mg(O)2
- 3. Multiple Choice
Potassium + Oxygen gives
2K2O
2CaO
2mgO
2N2O
- 4. Multiple Choice
Which one of the following metal reacts vigorously with oxygen and water?
Sodium
Potassium
Calcium
Magnesium
- 5. Multiple Choice
When MgO is dissolved in water, Mg(OH)2 is obtained. The solution thus obtained is _______________ in nature.
Amphoteric
Alkaline
Neutral
Acidic
- 6. Multiple Choice
Identify the non-metal which exists in a liquid state in room temperature 25∘C.
Aluminium
Mercury
Iodine
Bromine
- 7. Multiple Choice
What is the chemical formula of copper sulphate?
CuSO4
CuCO3
CuCI2
CuO
- 8. Multiple Choice
When magnesium reacts with water and oxygen, what can we observe?
Coated with black layer
Does not burn
Burns with a yellow flame
Burns with a brilliant white flame.
- 9. Multiple Choice
Zinc + Sulphuric = Zinc Sulphate + ______________
Oxygen
Hydrogen Gas
Nitrogen
Hydrogen Sulphate
- 10. Multiple Choice
Metals react with acids to produce _____________.
Oxygen
Smoke
Hydrogen
Nitrogen
- 11. Multiple Choice
Metal react with oxygen to produce _________ oxides and non-metal react with oxygen to produce_________ oxides.
Acidic, Basic
Basic, Acidic
Basic, Basic
Acidic, Acidic
- 12. Multiple Choice
The presence of _________ and _________ are necessary for iron to rust.
Air, Water
Rust, Water
Air, Rust
Hydrogen, Water
- 13. Multiple Choice
Chemical name of Potassium is :
Pu
K
Po
Ks
- 14. Multiple Choice
Chemical name of Sodium is :
Su
So
S
Na
- 15. Multiple Choice
Mercury is more reactive than Sodium.
True
False
- 16. Multiple Choice
Potassium is highly reactive while Platinum is least reactive.
True
False
- 17. Multiple Choice
The element which is stored under kerosene is-
Sulphur
Phosphorus
Sodium
Silicon
- 18. Multiple Choice
Which of the following metal exist in liquid state in room temperature?
Mercury
Bromine
Aluminium
Sodium
- 19. Multiple Choice
Corrosion of copper is-
Brown in colour
Black in colour
Green in colour
Blue in colour
- 20. Multiple Choice
Non- metal which is kept in water to prevent reaction with oxygen-
Phosphorus
Sodium
Potassium
Sulphur
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