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Matter in Our Surroundings — Science STD 9 — Question

Gujarat BoardEnglish MediumSTD 9ScienceMatter in Our Surroundings1 Mark
MCQ
Which is more effective in cooling:
  • ✓
    Lce at $0^{\circ} C$
  • B
    Water at $0^{\circ} C$
  • C
    Water at $100^{\circ} C$
  • D
    Lce at $100^{\circ} C$
✓

Answer

Correct option: A.
Lce at $0^{\circ} C$
$Lce$ is more effective than water in cooling liquids because ice needs additional energy to convert itself to water at zero degree celsius.
Thus it absorbs more heat from the liquid system making the liquid system cooler so ice at $0^{\circ} C$ is cooler than water at $0^{\circ} C.$

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