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STD 12 - p -Block elements - ll — JEE STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 ScienceJEESTD 12 - p -Block elements - ll4 Marks
MCQ
When $CuSO_4$ is added to a solution of ammonia
  • A
    Freezing point is lowered
  • ✓
    Freezing point is raised
  • C
    Boiling point is raised
  • D
    Both $(A)$ and $(C)$
✓

Answer

Correct option: B.
Freezing point is raised
b
Copper sulphate in ammonia solution form a complex which will lead to decrease the number of particles in solution. So, van't hoff factor will decrease.

Depression in freezing point and elevation in boiling point are directly proportional to the van 't hoff factor. Decreases in number of particles causes the increase in freezing point and decrease in the boiling point.

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