Which of the following solutions in water will have the lowest vapour pressure Options: A . &nbsp0.1 M,NaCl B . &nbsp0.1 M Na3 PO4 C . &nbsp0.1 M, BaCl2 D . &nbsp0.1 M, sucrose

Which of the following solutions in water will have the lowest vapour pressure &

Question

Which of the following solutions in water will have the lowest vapour pressure

Options:

A . 0.1 M,NaCl

B . 0.1 M Na3 PO4

C . 0.1 M, BaCl2

D . 0.1 M, sucrose

Answer: Option B
:
B
Depression in vapor pressure is a colligative property. More the no. of particles present in the solution lower will be the vapor pressure. consists of maximum ions hence it show lowest vapour pressure.

\begin{matrix} M o l e c u l e & N a C l & N a_{3} P o_{4} & B a C l_{2} & S u c r o s e N o . o f i o n s p e r m o l e c u l e & 1 + 1 = 2 & 3 + 1 = 4 & 1 + 2 = 3 & 1 \end{matrix}

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