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- 1. Multiple Choice
Liquid nitrogen boils at which temperature?
-256 ⁰ C
-196 ⁰ C
-87 ⁰ C
- 2. Multiple Choice
What caused the explosion in the picture?
increased pressure
increased the volume of container
decreasing the volume of container
- 3. Multiple Choice
The explosion caused by liquid nitrogen in a trashcan is an example of a physical change. Why?
because nitrogen is a gas.
because new substances are formed.
because no new substances are formed.
- 4. Multiple Choice
Which one of the following explosions are caused by physical changes?
explosion caused by mixing vinegar and baking soda.
volcano eruption
explosion caused by leaking petrol tank.
- 5. Multiple Choice
Which one of the following is an example of a physical change?
burning coal.
frying an egg.
heating solid wax until it changes to a liquid.
- 6. Multiple Choice
Which one of the following sentence is true for chemical change?
No new substances are made.
pressure is increased in the process.
atoms in reactants rearrange to form products.
- 7. Multiple Choice
Which one of the following is an example of a chemical change?
rusting of a metal.
slicing bread.
ice cube melting into water.
- 8. Multiple Choice
How can you increase pressure in gases?
increase the gas particles in a container.
decrease the size of container.
increase the temperature.
all the above.
- 9. Multiple Choice
Why decreasing the size of the container increases the pressure in gases?
so the particles will move faster.
so more particles hit the surface.
so particles hit a surface more often.
- 10. Multiple Choice
Why increasing the temperature also increases the pressure in gas?
because the particles move faster.
because the particles hit more often.
because he particles hit with more force.
all the above.
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