MHT CET · Chemistry · Solutions
Assuming complete ionisation, arrange the following solutions in order of increasing osmotic pressure.
a) \(0.5 \mathrm{~m} \mathrm{Li}_2 \mathrm{SO}_4\).
b) \(\quad 0.5 \mathrm{mKCl}\)
c) \(\quad 0.5 \mathrm{~m} \mathrm{Al}_2\left(\mathrm{SO}_4\right)_3\)
d) \(0.1 \mathrm{~m} \mathrm{BaCl}_2\)
- A d \( \lt \) b \( \lt \) a \( \lt \) c
- B b \( \lt \) d \( \lt \) c \( \lt \) a
- C a \( \lt \) d \( \lt \) c \( \lt \) b
- D c \( \lt \) d \( \lt \) b \( \lt \) a
Answer & Solution
Correct Answer
(A) d \( \lt \) b \( \lt \) a \( \lt \) c
Step-by-step Solution
Detailed explanation
Osmotic pressure is a colligative property that depends on number of particles in solution. The solution having more number of particles will have larger osmotic pressure.
Hence, \(\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3\) solution gives more number of particles and has the highest osmotic pressure among the given. So, the correct order of increasing osmotic pressure is \(\mathrm{d} \lt \mathrm{b} \lt \mathrm{a} \lt \mathrm{c}\)
Hence, \(\mathrm{Al}_2\left(\mathrm{SO}_4\right)_3\) solution gives more number of particles and has the highest osmotic pressure among the given. So, the correct order of increasing osmotic pressure is \(\mathrm{d} \lt \mathrm{b} \lt \mathrm{a} \lt \mathrm{c}\)
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