Rishi is surprised when he sees water ...

ICSE Class 10 Physics 2015 Paper

Question : 26 of 74

Marks: +1, -0

Rishi is surprised when he sees water boiling at

115^{\circ}\,\mathrm{C}

in a container. Give reasons as to why water can boil at the above temperature.

Solution:

Generally, water is boiling at

100^{\circ}\,\mathrm{C}

but Rishi is surprised when he sees water boiling at

115^{\circ}\,\mathrm{C}

. Because the boiling point of liquid (water) increases by the addition of impurities (e.g., salt) to it.

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