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      Year 8 Chemical Reactions on QuizRevolution

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      Year 8 Chemical Reactions

      Question
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      Year 8 Chemical Reactions
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      Which of the following is a chemical change?
      Wrong
       of players answered correctly.
      • ice-cream melting

      • freezing water to make ice cubes

      • cooking a hard-bolied egg

      • boiling water to make steam

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      Comments:
      1. Which of the following is a chemical change?
        1. ice-cream melting
        2. freezing water to make ice cubes
        3. cooking a hard-bolied egg
        4. boiling water to make steam

        1. A physical change is easily changed back, while a chemical change forms new substances and is not easily reversed.

      2. In a solid, the particles of matter are:
        1. arranged very closely, just vibrating in one place
        2. able to move or flow past each other easily
        3. able top fly around uncontrollably
        4. constantly crashing into each other and bouncing off
      3. When a solid is heated through it can change to a liquid. This is called
        1. freezing
        2. condensation
        3. melting
        4. evaporation
      4. The substances you begin with in a chemical reaction are called the:
        1. products
        2. gases
        3. reactants
        4. neutrals
      5. In science, a physical change involves a
        1. chemical reaction
        2. change of state
        3. explosion
        4. rusting
      6. Rust is produced when iron reacts with
        1. acid
        2. water
        3. oxygen
        4. oil
      7. An iron nail rusts faster if it is in:
        1. sitting just in air
        2. sitting in salt water
        3. painted
        4. wrapped in zinc
      8. A chemical that can speed up a reaction is known as a:
        1. product
        2. catalyst
        3. gas
        4. reactant
      9. Acids generally
        1. feel slippery
        2. taste sour
        3. taste bitter
        4. are coloured
      10. Which of the following will NOT increase the rate of a reaction
        1. increasing the temperature
        2. adding more reactants
        3. increasing the surface area by crushing
        4. adding more products
      11. The name of the reaction between an acid and a base that produces a salt and water is:
        1. cancellation
        2. destruction
        3. neutralisation
        4. elimination
      12. Which of the following is NOT a fossil fuel?
        1. petrol
        2. coal
        3. oil
        4. wood
      13. Which list shows substances from strong acid to strong base?
        1. vinegar, lemon juice, toothpaste, oven cleaner
        2. ornage juice, toothpaste, vinegar, oven cleaner
        3. oven cleaner, vinegar, orange juice, toothpaste
        4. toothpaste, orange juice, oven cleaner, vinegar
      14. If the pH of a swimming pool is too low:
        1. bacteria will thrive in it
        2. swimmers may get stinging eyes
        3. more chlorine should be added
        4. algae would begin to grow
      Tags: education , science

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