Answer: Option (d) is the correct answer.
Explanation:
When there are equal number of moles then molarity times volume of one solution equals the molarity times volume of another solution.
Mathematically, [tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
Since there are 1000 mL in 1 litre so, 250 mL equals 0.25 L. Therefore, calculate molarity as follows.
[tex]M_{1}V_{1} = M_{2}V_{2}[/tex]
[tex]6 M \times 0.25 L = 1.5 M \times V_{2}[/tex]
[tex]V_{2}[/tex] = 1 L
Thus, we can conclude that the volume of 1.5 M HCl is 1.0 L.
