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Q.

Which of the following observations reflect colligative properties?

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a

Pure water freezes at a higher temperature than pure methanol.

b

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

c

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

d

Water boils at a higher temperature in a pressure cooker.

answer is B, C.

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Detailed Solution

B) for BaCl2, vapour pressure is greater than NaCl.

C) Addition of an electrolyte decreases the freezing point of pure water.

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