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Standard XII

Physics

Capillary Action

No capillarit...

Question

No capillarity will take place if:-
(i) The liquid is at its boiling point
(ii) The liquid is at its freezing point
(iii) The angle of contact is $0^{\circ}$
(iv) The angle of contact is $90^{\circ}$

(i,ii)

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(i,iv)

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(i,ii,iii)

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(ii,iv)

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Solution

The correct option is C (i,ii,iii)
capillarity will not take place when the liquid is at its boiling point, the liquid is at its freezing point and the angle of contact is $0^{0}$

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Similar questions

Select the correct alternative:

(a) The inter-molecular force is maximum in :

(i) solids (ii) gases

(iii) liquids (iv) none of the above.

(b) The inter-molecular space is maximum in :

(i) liquids (ii) solids

(iii) gases (iv) none of the above.

(i) gases (ii) liquids

(iii) solids (iv) none of the above

(d) The molecules move only within the boundary of :

(i) liquids (ii) gases

(iii) solids (iv) none of the above

(e) The temperature at which a liquid gets converted into its vapour state is called its :

(i) melting point (ii) boiling point

(iii) dew point (iv) freezing point

(f) Rapid conversion of water into steam is are an example of:

(i) evaporation (ii) freezing

(ii) melting (iv) vaporization

(g) Evaporation takes place from the :

(i) surface of liquid

(ii) throughout the liquid

(iii) mid-portion of the liquid

(iv) bottom of the liquid

(h) Boiling takes place from:

(i) the surface of the liquid

(ii) throughout the liquid

(iii) mid-portion of liquid

(iv) none of the above

Q. Match the equilibria with the corresponding conditions.
i) Liquid ⇌ Vapour 1. Melting point
ii) Solid ⇌ Liquid 2. Freezing point
iii) Solid ⇌ Vapour 3. Boiling point
iv) Liquid ⇌ Solid 4. Sublimation point
5. Condensation point

Among the following structures I to IV
I. II. III. IV.
It is true that

The variation of vapour pressure of different liquids with temperature is shown in fugure

(i) Calculate graphically boiling points of liquids A and B.

(ii) If we take liquid C in a closed vessel and heat it continuously. At what temperature will it boil?

(iii) At high altitude, atmospheric pressure is low (say 60 mm Hg). At what temperature liquid D boils?

(iv) Pressure coojer is used for cooking food at hill station. Explain in terms of vapour pressure why is it so?

Q. A liquid will NOT wet the surface of a solid if its angle of contact is

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No capillarity will take place if:-(i) The liquid is at its boiling point(ii) The liquid is at its freezing point(iii) The angle of contact is 0∘(iv) The angle of contact is 90∘

The correct option is C (i,ii,iii)capillarity will not take place when the liquid is at its boiling point, the liquid is at its freezing point and the angle of contact is00

No capillarity will take place if:-
(i) The liquid is at its boiling point
(ii) The liquid is at its freezing point
(iii) The angle of contact is $0^{\circ}$
(iv) The angle of contact is $90^{\circ}$

The correct option is C (i,ii,iii)
capillarity will not take place when the liquid is at its boiling point, the liquid is at its freezing point and the angle of contact is $0^{0}$