Select the correct option based on statements below:

Assertion (A): When methyl alcohol is added to water, boiling point of water increases.
Reason (R): When a volatile solute is added to a volatile solvent, elevation in boiling point is observed.
 
1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. Both (A) and (R) are False.
Subtopic:  Elevation of Boiling Point | Raoult's Law |
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital

Given below are two statements :
Statement I: The proportionality constant, Kf, depends on the nature of the solvent as well as the solute. 
Statement II: When blood cells are placed in water containing less than 0.9 % (mass/volume) salt,
blood cells shrink due to osmosis. 

In light of the above statements choose the correct answer from the options given below:
1. Statement I is correct; Statement II is incorrect
2. Statement I is incorrect; Statement II is incorrect
3. Statement I is incorrect; Statement II is correct
4. Statement I is correct; Statement II is correct
Subtopic:  Raoult's Law |
From NCERT
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The vapour pressures of two pure isomeric liquids, X and Y, are 200 torr and 100 torr, respectively, at a given temperature. Assuming a solution of these components to obey Raoult’s law, the mole fraction of component Y in the vapour phase in equilibrium with the solution containing equal amounts of X and Y at the same temperature is: 
1. 0.33
2. 0.50
3. 0.66
4. 0.80
Subtopic:  Raoult's Law |
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Which of the following graph is correct for an ideal binary liquid solution containing non-volatile solute?

1. 2.
3. 4. All are correct
Subtopic:  Raoult's Law |
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