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- 1. Multiple Choice
A non metal used to preserve food material is:
Carbon dioxideNitrogenHydrogenOxygen - 2. Multiple Choice
The metals that float when treated with water are:
Mn and Ca
Mg and Ca
Na and Ca
Mg and Na
- 3. Multiple Choice
Which metal is liquid at room temperature
mercury
bromine
lithium
sodium
- 4. Multiple Choice
Process by which metal with high reactive series obtained
Electrolysis Reduction
Calcination
Reduction
Thermit reduction
- 5. Multiple Choice
Alloy in which one of the metal is mercury known as
Anode Mud
Amalgam
Ore
Gangue
- 6. Multiple Choice
Brass is a mixture of
Cu and Sn
Hg and C
Cu and Zn
None of these
- 7. Multiple Choice
The most abundant metal in the Earth's crust is
GoldAluminumCopperIron - 8. Fill in the Blank
-- is an allotrope of carbon and is the hardest natural substance.
- 9. Multiple Choice
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
Gallium
Aluminium
Silver
Zinc
- 10. Multiple Choice
Which property of Gold makes it suitable for making electric wires?
Good conductor of electricityDuctileMalleable
Good conductor of heat
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