Question

$I$. A $1m$ $NaCl$ solution is more concentrated than a $1M$ $NaCl$ solution.
$II$. One liter of water has a volume of $1000mL$ and a mass of $1000g$ or $1kg$

• A. Statement $I$ is true, Statement $II$ is true
• B. Statement $I$ is true, Statement $II$ is false
• C. Statement $I$ is false, Statement $II$ is true
• D. Statement $I$ is false, Statement $II$ is false

Answer 1

The correct option is C Statement $I$ is false, Statement $II$ is true

A 1 molar solution is a solution in which 1 mole of a compound is dissolved in a total volume of 1 litre.

1 molar solution contains 1 mole of solute in 1 litre of the solution which includes both solute and solvent.

So, the mass of solvent (i.e. water) is less than 1000 gram. Therefore 1 molar aqueous solution contains 1 mole of solute is less than 1000 gram of solvent.

Whereas 1 molal solution has 1 mole of solute in 1000 gram of solvent.

1 is false

One litre of water has a mass of almost exactly one kilogram when measured at its maximal density,

II is the correct

the answer is finally C