Viscosity

Q.

Explain the effect of temperature on surface tension and viscosity.

Q. Which of the following liquids has the highest viscosity ?

1. Benzene
2. Carbon disulphide
3. Acetone
4. Ethanol

Q. Viscosity of liquid decreases with increase in temperature.

1. True
2. False

Q.

Explain the effect of increasing the temperature of a liquid, on intermolecular forces operating between its particles. What will happen to the viscosity of a liquid if its temperature is increased?

Q.

Does surface tension depend on the surface area?

Q.

A liquid surface always tends to have minimum surface area due to the property of

Q.

What are the physical properties of liquids?

Q.

How do covalent bonds dissolve in water? Give example.

Q.

Explain the term 'laminar flow'. Is the velocity of molecules same in all the layers in laminar flow? Explain your answer.

Q. 34.What is grothus conductance.Explain in detail

Q. One of the following expressions regarding the unit of coefficient of viscosity is not true.

1. dyne cm^–2 sec
2. dyne cm² sec^–1
3. Nm^–2 sec
4. poise

Q.

Increae in kinetic energy can overcome intermolecular forces of attraction. How will the viscosity of liquid be affected by the increase in temperature?

(a) Increase (b) No effect

(c) Decrease (d) No regular pattern will be followed

Q.

Explain the inter-conversion of three states of matter in terms of force of attraction and kinetic energy of molecules.

Q.

Q.. What are Vicious liquid. Explain briefly?

Q. In 4sec , 9 g of ice melts (I) In 8sec , how many grams of ice melts (II)?

Q. With the increasing molecular weight of a liquid, the viscosity

1. Decreases
2. Increases
3. Remain constant
4. All are wrong
   

Q. Which of the following liquids has the highest viscosity ?

1. Benzene
2. Carbon disulphide
3. Acetone
4. Ethanol

Q. A: 0.1 M solution of glucose has same incrémentin the freezing point than 0.1 M solution of urea. R: K_{} for both has same value.

Q.

Choose the correct statement with respect to liquids or the liquid state:

1. Surface tension increases with temperature

2. Addition of soap reduces surface tension

3. Stalagmometer measures viscosity

4. Viscosity is independent of intermolecular forces

Q. With the increasing molecular weight of a liquid, the viscosity

1. Decreases
2. Increases
3. Remain constant
4. All are wrong
   

Q. Which one of the following is a pseudo solid?

1. Calcium fluoride
2. Glass
3. Sodium chloride
4. All of the above

Q. Explain surface tension and viscocity by giving one example.

Q. A mixture of N O2 and N2O4 . Average molecular weight is 58. Then determine percentage composition of NO2andN2O4.

Q.

Of the two lubricants A and B for a machine, A has a co-efficient of viscosity slightly greater than that of B. Which would you prefer in summer and winter?

Q.

Explain the inter conversion of the three states of matter in terms of force of attraction of the particles and kinetic energy of the particles.

Q. The property of liquids to resist their flow is called _______.

1. rigidity
2. viscosity
3. flow
4. thickness

Q. Which of the following expressions regarding the unit of coefficient of viscosity is not true?

1. $Dynec{m}^{-2}sec$
2. $Dynec{m}^{2}se{c}^{-1}$
3. $N{m}^{-2}sec$
4. $1poise={10}^{-1}N{m}^{-2}sec$

Q. Viscosity of liquid decreases with increase in temperature.

1. True
2. False

Q. Explain the term '$\text{Laminar Flow}$'. Is the velocity of molecules same in all the layers in laminar flame? Explain your answer.

Q. Viscosity of a liquid decreases with an increase in its temperature.

1. True
2. False