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Question
The temperature of ice can be decreased below 0∘C by mixing ……… in in it.
The temperature of ice can be decreased below 0∘C by mixing ……… in in it.
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Solution
The correct option is C salt
- Salt lowers the temperature of the ice or ice water from
to subzero temperatures. - This action occurs because salt depresses the freezing point of water and reduce the temperature much below it. This point is called freezing point depression.
- Since the salt ion gets its way into water molecules, water molecules tend to crystallize to form ice.
- Using this principle, even without a refrigerator, ice creams can be made by keeping the mixture in a bowl of salted ice
- option C is correct .
- Salt lowers the temperature of the ice or ice water from
- This action occurs because salt depresses the freezing point of water and reduce the temperature much below it. This point is called freezing point depression.
- Since the salt ion gets its way into water molecules, water molecules tend to crystallize to form ice.
- Using this principle, even without a refrigerator, ice creams can be made by keeping the mixture in a bowl of salted ice
- option C is correct .
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