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The change from solid state to vapour state without passing through the liquid state is called , and the substance is said to sublime.

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Important Questions on States of Matter: Gaseous and Liquid States

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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
The units of surface tension and viscosity of a liquid, respectively, are
MEDIUM
Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
The qualitative sketches I, II and III given below show the variation of surface tension with molar concentration of three different aqueous solutions of KCl, CH3OH  and CH3CH211OSO3- Na+ at room temperature. The correct assignment of the sketches is -

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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State

Based on the given figure, the number of correct statement/s is/are

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A. Surface tension is the outcome of equal attractive and repulsion forces acting on the liquid molecule in bulk.

B. Surface tension is due to uneven forces acting on the molecules present on the surface.

C. The molecule in the bulk can never come to the liquid surface.

D. The molecules on the surface are responsible for vapour pressure if the system is a closed system.

 

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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
The viscosity of a liquid can be decreased by
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
The liquid having maximum surface tension is
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A graph of vapour pressure and temperature for three different liquids X,Y and Z is shown below:
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The following inferences are made:
AX has higher intermolecular interactions compared to Y.
BX has lower intermolecular interactions compared to Y.
CZ has lower intermolecular interactions compared to Y.
The correct inferences is/are:
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
The S.l unit of coefficient of viscosity (η) is:
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
At 35 oC, the vapour pressure of CS2, is 512 mmHg and that of acetone is 144 mmHg. A solution of CS2 in acetone has a total vapour pressure of 600 mmHg. The false statement amongst the following is:
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
Which is true statement?
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State

When a body falls in air, the resistance of air depends to a great extent on the shape of the body. 3 different shapes are given. Identify the combination of air resistances which truly represents the physical situation ? (The cross-sectional areas are the same)

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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
Which is not a surface phenomenon?
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A 1 L flask contains air, water vapour and a small amount of liquid water at a pressure of 200 mm Hg. If this flask is connected to another 1 L evacuated flask, what will be the final pressure of the gas mixture at equilibrium? Assume the temperature to be 50°C and aqueous tension at 50°C=93 mm Hg.
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A viscous fluid is flowing through a cylindrical tube. The velocity distribution of the fluid is best represented by the diagram
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
Select correct statement(s)
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
Evaporation and boiling differs
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A capillary tube of length L and radius r is connected with another capillary tube of the same length but half the radius in series. The rate of steady volume flow of water through first capillary tube under a pressure difference of p is V. The rate of steady volume flow through the combination will be (the pressure difference across the combination is p)
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A liquid is flowing in a horizontal uniform capillary tube under a constant pressure difference P. The value of pressure for which the rate of flow of the liquid is doubled when the radius and length both are doubled is.
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A mosquito with 8 legs stands on water surface and each leg makes depression of radius ′a′. If the surface tension and angle of contact are ′T′ and zero respectively then the weight of mosquito is -
HARD
Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
A ring is cut from a platinum tube 8.5 cm internal diameter and 8.7 cm external diameter. It is supported horizontally from a pan of a balance so, that it comes in contact with the water is in glass vessel. If an extra 3.47 g-wt is required to pull it away from water, surface tension of water is
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Chemistry>Physical Chemistry>States of Matter: Gaseous and Liquid States>Liquid State
Two capillary tubes of same radius r but of lengths l1 and l2 are fitted in parallel to the bottom of a vessel. The pressure head is P. What should be the length of a single tube that can replace the two tubes so that the rate of flow is same as before