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- 1. Fill in the Blank
Physical changes can be _______ or _______
- 2. Multiple Choice
Choose the chemical change among the following
- 3. Multiple Choice
A change is a chemical change when it is accompanied by:
energy change
formation of new substances
change in chemical properties
all of the above
- 4. Multiple Choice
The shipping industry has to bear huge financial losses because of rusting of ships.The rusting of ships occurs because:
the body of ship is always in contact with water
the air around the ship is humid
presence of salts in sea water speed the process of rusting
all of the above
- 5. Multiple Choice
Expansion and contraction of metals is a:
physical change
chemical change
irreversible change
none of these
- 6. Multiple Choice
Hydrochloric acid is added to a beaker containing a piece of zinc. Zinc chloride is formed and hydrogen gas is released.This is an example of:
chemical reaction
physical change
crystallisation
none of these
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