Which of the following is correct?
1. Two different solutions of urea of same molality will have same depression in freezing point.
2. Best method to calculate molar mass of biomolecule is via relative lowering of vapour pressure.
3. Decreasing order of osmotic pressure at the same temperature for 0.1M aqueous solution of BaCl2, KCl, and sucrose is BaCl2 >KCl >Sucrose
4. Vant Hoff factor of 0.1M Nacl and 0.1M CaCl2 aq.solution is same
Answers
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Answer:
option A is right answer
Answered by
0
Answer:
The correct option from the following is:
- (3) Decreasing request of osmotic weight at a similar temperature for 0.1 M watery arrangement of BaCl2, KCl, and sucrose is BaCl2 > KCl > Sucrose.
- - Osmotic weight is a colligative property, i.e., it relies on the no of solute particles.
- - In watery arrangement, BaCl2 separates to give 3 particles, KCl separates to give 2 particles and sucrose doesn't separate.
- - Hence, at a similar temperature and focus, BaCl2 will have the biggest and sucrose will have the most minimal osmotic weight.
- So, the right answer is alternative (3).
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