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- 1. Multiple Choice
What is corrosion of iron known as?
Rancidity
Fermentation
Rusting
Tarnishing
- 2. Multiple Choice
What type of chemical reaction is rusting of iron?
Combination reaction
Decomposition reaction
Single Replacement reaction
Combustion reaction
- 3. Multiple Choice
A wooden chair will be affected by corrosion?
True
False
- 4. Multiple Choice
Which of these objects would be affected by corrosion?
Bridges
Cars
Ships
Railway lines
All of these
- 5. Multiple Choice
Gold ornaments do not lose their lustre.
True
False
- 6. Multiple Choice
What is the chemical formula of rust?
Fe2O5
FeO
Fe2O4
Fe2O3.H2O
- 7. Multiple Choice
Corrosion of iron occurs in the presence of:
Air and water
Water and sugar
Gas and sugar
Gas and water
- 8. Multiple Choice
When a vessel is exposed to air, it forms green coating on the surface. The vessel must be made of:
Zinc
Copper
Magnesium
Iron
- 9. Multiple Choice
Which of the following is NOT a method to prevent corrosion?
Galvanization
Crystallization
Alloying
Electroplating
- 10. Multiple Choice
The condition produced by aerial oxidation of fats and oils marked by unpleasant smell and taste is called:
Antioxidation
Reduction
Corrosion
Rancidity
- 11. Multiple Choice
Which of the following gases can be used for storage of food products?
Carbon dioxide or oxygen
Helium or nitrogen
Nitrogen or oxygen
Carbon dioxide or helium
- 12. Multiple Choice
A substance added to food containing fats and oils to prevent rancidity is called:
Oxidant
Rancid
Codant
Antioxidant
- 13. Multiple Choice
Why potato chips manufacturers flush bags of chips with nitrogen gas? (CBSE 2011)
To prevent chips from growing in size
To prevent insects from entering the packets of chips
To prevent chips from getting oxidized
To keep the chips crisp
- 14. Multiple Choice
Keeping food in ............. helps to slow down oxidation
Wooden containers
Air tight containers
Glass containers
None of these
- 15. Poll
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