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