Published by:
CGP EDU Academic Team
Published on: August 14, 2026
At a constant temperature, which of the following aqueous solutions will have the maximum vapour pressure? (Mol. wt. Nad = 58.5, H 2 SO 4 = 98.0 g mol -1 )
Text Solution
Verified by ExpertsThe correct answer is:
A
1 molal NaCl (aq)
One molar (1 M) aqueous solution is more concentrated than one molal aqueous solution of the same solute. In solution, H 2 SO 4 provides three ions. While NaCl provides two ions. Hence, vapour pressure of solution of NaCl is higher (as it gives less ions). Therefore, 1 molal NaCl will have the maximum vapour pressure.
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