Statement I:One molar aqueous solution (d=1gm/cc) has always higher concentration than one molal. Statement II: The molality of a solution does not depends on temperature whereas molarity depends

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Statement I:One molar aqueous solution (d=1gm/cc) has always higher concentration than one molal.
Statement II: The molality of a solution does not depends on temperature whereas molarity depends

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Statement I and Statement II are true.

Statement I is true and statement II is false.

Statement I is false and Statement II is true.

Statement I and Statement II are false.

answer is A.

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Detailed Solution

(I)

consider 1 molal sol. of Glucose

n_solute = 1 , W_s = 1(180) = 180g

W_o =1000g

1 molal solution means 1 mole solute present in 1000g of solvent

1 Molar solution of Glucose:

n_s =1 , W_s = 1(180) =180g

V_sol = 1000ml , d_sol.=1g/cc

W_sol.= 1000g, W_o = (1000-180) = 820g

1M sol. means 1 mole of solute in 820g of solvent

By comparing 1M & 1m sol. of Glucose,

1M sol. is more concentrated than 1m sol.

(II)

\large molality\propto\frac{1}{W_{solvent}}

Wt. of substance is independent of Temperature

Vol. depends on Temp.

Molarity depends on Temp.

(I) &(II) are true

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