Question:
Two solutions that are isotonic have same ......
Two solutions that are isotonic have same ......
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Isotonic solutions have the same osmotic pressure, which is determined by the concentration of solute particles in the solutions.
Updated On: Apr 18, 2026
- Same boiling point
- Same freezing point
- Same vapour pressure
- Same osmotic pressure
- Same solubilities
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The Correct Option is D
Solution and Explanation
Isotonic solutions are solutions that have the same osmotic pressure. This means that when two solutions are isotonic, they exert the same pressure on a semipermeable membrane, as they contain the same concentration of solute particles.
Step 1: Definition of isotonic solutions.
Isotonic solutions have equal osmotic pressure, and this is the defining characteristic of isotonicity. Osmotic pressure is related to the concentration of solute particles, and when two solutions are isotonic, they have the same concentration of solute.
Step 2: Explanation of other options.
- Same boiling point and same freezing point: These are related to the colligative properties of the solutions, but isotonicity specifically refers to osmotic pressure, not these properties.
- Same vapor pressure: While vapor pressure is also a colligative property, it is not directly related to isotonicity.
Step 3: Conclusion.
Thus, the correct answer is (D) Same osmotic pressure, as isotonic solutions must have the same osmotic pressure.
Final Answer:} (D) Same osmotic pressure
Isotonic solutions have equal osmotic pressure, and this is the defining characteristic of isotonicity. Osmotic pressure is related to the concentration of solute particles, and when two solutions are isotonic, they have the same concentration of solute.
Step 2: Explanation of other options.
- Same boiling point and same freezing point: These are related to the colligative properties of the solutions, but isotonicity specifically refers to osmotic pressure, not these properties.
- Same vapor pressure: While vapor pressure is also a colligative property, it is not directly related to isotonicity.
Step 3: Conclusion.
Thus, the correct answer is (D) Same osmotic pressure, as isotonic solutions must have the same osmotic pressure.
Final Answer:} (D) Same osmotic pressure
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