MATSEC SEC Core Science Practice Questions - Malta Secondary Education Certificate (SEC) Core Science - SEC 45 (2026) Exam

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A sample of pure water melts at 0 °C and boils at 100 °C at standard atmospheric pressure. What does a sharp melting point mainly indicate?

The sample is impure The sample is likely pure The sample must be a mixture of salts The sample contains dissolved air only

Correct Answer:

The sample is likely pure

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