MHT CET · Chemistry · Solutions
Maximum depression in freezing point is caused by
- A potassium chloride
- B sodium sulphate
- C magnesium sulphate
- D magnesium carbonate
Answer & Solution
Correct Answer
(B) sodium sulphate
Step-by-step Solution
Detailed explanation
Depression in freezing point is a colligative property, so depends upon the number of particles. Among, potassium chloride (KCl), sodium \(\quad\) sulphate \(\quad\left(\mathrm{Na}_{2} \mathrm{SO}_{4}\right), \quad\) magnesium sulphate \(\left(\mathrm{MgSO}_{4}\right)\) and magnesium carbonate \(\left(\mathrm{MgCO}_{3}\right), \mathrm{Na}_{2} \mathrm{SO}_{4}\) produces maximum number
of particles.
\(\mathrm{Na}_{2} \mathrm{SO}_{4} \rightleftharpoons \underbrace{2 \mathrm{Na}^{+}+\mathrm{SO}_{4}^{2-}}_{3 \text { particles }}\)
Thus, it causes maximum depression in freezing point.
of particles.
\(\mathrm{Na}_{2} \mathrm{SO}_{4} \rightleftharpoons \underbrace{2 \mathrm{Na}^{+}+\mathrm{SO}_{4}^{2-}}_{3 \text { particles }}\)
Thus, it causes maximum depression in freezing point.
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