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प्रश्न
It is difficult to cook vegetables on hills and mountains. Explain the reason.
उत्तर
This is because at high altitudes atmospheric pressure is low; therefore, boiling point of water decreases and so it does not provide the required heat energy for cooking.
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संबंधित प्रश्न
Rapid conversion of water into steam is an example of
Describe an experiment to demonstrate that water absorbs heat during boiling at a constant temperature.
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Reason: The process of conversion of water vapours to liquid by cooling the vapours is called condensation.
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Conversion of solid to vapour is called sublimation. Name the term used to denote the conversion of vapour to solid.
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Reason (R): Melting of wax is a physical change melted wax turns into vapours and then bums which is a chemical change.
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Reason (R): Conversion of water into steam is a physical change.
