Multiple choice general knowledge

which of the following options are true?

  1. Water expands when it cools

  2. all metals contract when they are electrocuted

  3. all metals contract when they are cooled

  4. there is no effect of temperature on the gases
Reveal answer Fill a bubble to check yourself
A,C Correct answer
Explanation

Water does expand when it cools from 4°C to 0°C (ice is less dense than liquid water). All metals contract when cooled due to reduced thermal vibration of atoms. Option B is nonsense - 'electrocuted' is not a thermal process. Option D is false - gases expand when heated (Charles's Law).

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