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Question

1 molal solution is one that contains one mole of solute in:


A

1000g of solvent

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B

1L of solvent

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C

1L of solution

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D

22.4L of solution

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Solution

The correct option is A

1000g of solvent


The explanation for the correct option.

(A) - 1000g of solvent

Molality (m): The number of moles of solute dissolved in 1000g (1 kg) of a solvent is known as the molality of the solution.

Molality=NumberofmoleofsoluteMassofsolventingram×1000

The explanation for incorrect options.

(B)- 1L of solvent

When 1 mole of a substance is present in 1 L of a solution is known as a normal solution.

(C) 1L of solution

A molar solution is defined as an aqueous solution that contains 1 mole (gram-molecular weight) of a compound dissolved in 1 litre of a solution.

(D)- 22.4L of solution

One of the most practical results of the Avogadro's is the molar volume of gases Vm which is 22.4 dm3/mol.

Hence, Option (A) is the correct option.


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