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Which of the following statements is/are...

Which of the following statements is/are correct ?

A

The freezing point of water is depressed by the addition of glucose

B

The degree of dissociation of a weak electrolyte decrease as its concentration decreases

C

Energy is released when a substance dissolves in water provided that the hydration energy of the substance is more than its lattice energy.

D

If two liquids that form an ideal solution are mixed, the change inentropy is positive.

Text Solution

Verified by Experts

The correct Answer is:
A, C, D
(A) There will be a depression in the freezing point by the addition of glucose in water
(B) `alpha` increases as concentration decreases.
(C ) `Delta_(sol) H = Delta_("lattice") H + Delta_(hyd) H`
(-ve) (-ve)
(D) Mixing of solution is always accompanied by an increase in entropy (randomess)
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