PDF chapter test TRY NOW
Read the statement and select the correct answer:
1. Statement 1: Some of the physical changes are reversible changes.
Statement 2: All the physical changes are irreversible.
Statement 2: All the physical changes are irreversible.
2. A blacksmith heats an iron rim to fix it on the wooden wheel because on heating
Statement 1: The iron rim expands and fits onto the wooden wheel.
Statement 2: Expands first, then contracts on cooling and fits onto the wooden wheel.
Statement 1: The iron rim expands and fits onto the wooden wheel.
Statement 2: Expands first, then contracts on cooling and fits onto the wooden wheel.
3. Decaying of food is considered a chemical change because
Statement 1: It is possible to get original food from spoiled food.
Statement 2: It is a permanent, irreversible change.
Statement 1: It is possible to get original food from spoiled food.
Statement 2: It is a permanent, irreversible change.
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