One molar solution of which substance will have maximum O.P?

NaCl

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Glucose

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Fructose

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Starch

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Solution

The correct option is A NaCl
Osmotic pressure depends on the number of solute particles in the solution. One molecule of sodium chloride in aqueous solution will give rise to two particles-one sodium and another chlorine ion.
All the other compounds will remain as one particle only. Thus, in one molar solution of sodium chloride twice the number of particles will be present as compared to one molar solution of other compounds. Thus, osmotic pressure of one molar solution of sodium chloride will be maximum.

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