There are two beakers I and II with p-hydroxy bezaldehyde and o-hydroxybenzaldehyde respectively at a given temperature. The vapour pressure of II at the same temperature would be:

Higher than that of I

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Lesser than that of I

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Same as that of I

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Cannot be predicted with the given data

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Solution

The correct option is A Higher than that of I
p-Hydroxybenzaldehyde will exhibit inter-molecular hydrogen bonding whereas o-hydroxybenzaldehyde would exhibit intra-molecular hydrogen bonding. This means that p-hydroxybenzaldehyde would have a greater boiling point and hence is less volatile. So, beaker II would exhibit more vapour pressure than I as o-hydroxybenzaldehyde is more volatile.

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Similar questions

Two beakers of capacity 500 mL were taken. One of these beakers, labelled as "A", was filled with 400 mL water whereas the beaker labelled "B' was filled with 400 mL of 2M solution of NaCl. At the same temperature both the beakers were placed in closed containers of same material and same capacity as shown in figure.

At a given temperature, which of the following sttement is correct about the vapour pressure of pure water and that of $N a C^{1}$ Solution?
(a) Vapour pressure in container (A) is more than that in container (B)
(b) Vapour pressure in container (A) is less than that in container (B)
(c) Vapour pressure is equal in both the containers
(d) Vapour pressure in container (B) is twice the vapour pressure in container (A)

Q. Match the items given in Column I and Column II.

	Column I		Column II
$(i)$	Saturated solution	$(a)$	Solution having the same osmotic pressure at a given temperature as that of the given solution.
$(i i)$	Binary solution	$(b)$	A solution whose osmotic pressure is less than that of another.
$(i i i)$	Isotonic solution	$(c)$	Solution with two components
$(i v)$	Hypotonic solution	$(d)$	A solution which contains the maximum amount of solute that can be dissolved in a given amount of solvent at a given temperature.
$(v)$	Solid Solution	$(e)$	A solution whose osmotic pressure is more than another.
$(v i)$	Hypertonic Solution	$(f)$	A solution in the solid phase

Q. In which case first has higher solubility than second?
(I) Phenol, Benzene
(II) Nitrobenzene, Phenol
(III) o-Hydroxybenzaldehyde, p-Hydroxy benzaldehyde
(IV)

C H_{3} C H O, C H_{3} - O - C H_{3}

(V) o-Nitrophenol, p-Nitrophenol

Q. Two beakers of capacity

500 m L

were taken. One of these beakers, labelled as "A", was filled with

400 m L

water whereas the beaker labelled "B" was filled with

400 m L

2 M

solution of

N a C l

. At the same temperature, both the beakers were placed in closed containers of the same material and same capacity as shown in the figure.
At a given temperature, which of the following statements is correct about the vapour pressure of pure water and that of

N a C l

solution?

Question 13
At a given temperature, osmotic pressure of a concentrated solution of asubstance.......... .
(a) is higher than that of a dilute solution
(b) is lower than that of a dilute solution
(c) is same as that of a dilute solution
(d) cannot be compared with osmotic pressure of dilute solution.

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