Which of the following observations reflect colligative properties?

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Water boils at a higher temperature in a pressure cooker.

0.5 M NaCl solution has higher vapour pressure that 0.5 M BaCl2 solution.

0.25 M H2SO4 solution freezes at a lower temperature than pure water

Pure water freezes at a higher temperature than pure methanol.

answer is B.

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Detailed Solution

(2) i.e. for BaCl2 is greater than NaCl.(3) Addition of an electrolyte freezing point to decrease.

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