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Answer:

Tick the correct answer:

1. III) Sublimation

2. iii) Physical change

3. iii) Ag

True or False:

1. True.

2. False. In an ENDOTHERMIC reaction, HEAT is absorbed.

3. False. The substances formed in a chemical reaction are CALLED products.

Answer the following questions:

1. Carbon dioxide is present in aerated drinks. When thermal energy is added to a substance, automatically, the physical state changes. Temperature, Pressure are physical factors that affect the states of matters.

2. Evaporation:

  • Surface phenomenon
  • Natural change

Boiling:

  • Bulk phenomenon
  • Human-made change.

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