Expansion In Liquids and Gases

Q.

Explain the real and apparent expansions of liquids

Q. Gas thermometers are more advantageous than liquid thermometers because of:

1. Proper expansion
2. Higher accuracy
3. Wider range of temperature scale
4. All of the above.

Q.

What do you mean by a pitch of the screw?

Q. Assertion: Gases are highly compressible than solids and liquids.

Reason: Interatomic or intermolecular distance in gases is higher than those in liquids.

1. Both the assertion and the reason are true and the reason is the correct explanation of the assertion.
2. Both the assertion and the reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is true but the reason is false.
4. Assertion is false but the reason is true.

Q.

Why mercury is preferred in most of the thermometers?

1. It is in liquid state at room temperature.

2. The slightest change in temperature is notable due to its expansion properties.

3. It does not stick to the glass.

4. It is very clean at room temperature.

Q. Explain two types of expansion in liquids. Why are there are two types of expansion in liquids?
[5 marks]

Q.

A bakelite beaker has a volume capacity of $500cc$ at $30°C$. When it is partially filled with $V_m$ volume (at $30°C$) of mercury, it is found that the unfilled volume of the beaker remains constant as the temperature is varied. If ${\gamma }_{\left(beaker\right)}=6\times {10}^{-6}°C^{-1}$ and ${\gamma }_{\left(mercury\right)}=1.5\times {10}^{-4}°C^{-1}$where $\gamma$ is the coefficient of volume expansion, then $V_m\left(cc\right)$ is close to

Q.

Suppose you want to convert a gas into a liquid. Which two methods can you apply?

Q.

The correct relation between coefficient of linear expansion $\alpha$, coefficient of surface expansion $\beta$ and coefficient of volume expansion$\gamma$ is

1. $2\alpha =\beta =\gamma$

2. $\alpha =\beta =\gamma$
   

3. $\alpha =\frac{\beta }{2}=\gamma$
   

4. $\alpha =\frac{\beta }{2}=\frac{\gamma }{3}$
   

Q. A boat having length 2m and width 1m is floating in a lake. When a man stands on the boat, it is depressed by 3 cm. The mass of the man is

1. 60kg
2. 70kg
3. 50kg
4. 55kg

Q.

The coefficient of linear expansion of a solid depends on the unit of ___.

Q.

Assertion (A): The viscosity of a liquid decreases with rise in temperature.
Reason (R): Viscosity of a liquid is the property of the liquid by virtue of which it opposes the relative motion amongst its different layers.

1. A and R are true and R is the correct explanation of A.

2. A and R are true, but R is not the correct explanation of A.

3. A is true but R is false.

4. Both A and R are false.

Q. Which of the following expands the most for an equal rise in temperature?

1. Kerosene
2. Helium
3. Water
4. Mercury

Q.

The coefficient of linear expansion of a solid depends on?

1. Unit of length
   

2. Scale of temperature
   

3. Density of the material
   

4. None of the above

Q.

The expansion of a substance on heating is called ___expansion.

Q.

Let ${\gamma }_r$ = Coefficient of real expansion

${\gamma }_a$ = Coefficient of apparent expansion

${\gamma }_a$ = Coefficient of volume expansion of vessel

Then , ${\gamma }_r$ =___.

1. None of the above

2. $({\gamma }_r$+${\gamma }_v$)

3. $({\gamma }_r$ - ${\gamma }_v$)

4. $({\gamma }_r\times$${\gamma }_v$)

Q. At what temperature the density of water is maximum?
(a) 273°C
(b) 4°C
(c) 0°C
(d) 100°C

Q.

State True or False:

The coefficient of linear expansion is three times the coefficient of volume expansion.

1. True

2. False

Q.

The coefficient of volume expansion is equal to ____

1. twice the coefficient of linear expansion

2. equal to the coefficient of linear expansion

3. thrice the coefficient of surface expansion

4. equal to the coefficient of surface expansion

Q. Consider the following statements:

1. The coefficient of cubical expansion of a liquid depends on the temperature of the liquid.


2. The real expansion of a liquid is always greater than the apparent expansion of the liquid.

Which of the the statements are true?

1. Only $1$
2. Only $2$
3. Neither $1$ nor $2$
4. Both $1$ and $2$

Q. A liquid is heated in a container. Which of the two will expand?

1. Only the liquid
2. Neither
3. Only the container
4. Both

Q. The steam in the cylinder expands and pushes the piston forward, that forward movement of the piston in a steam engine is called as

1. Exhaust stroke
2. Ignition stroke
3. Compression stroke
4. Expansion stroke

Q.

1)A vessel contains oil (density 0.8 g/cc) over Mercury( density 13.6 g/cc).a homogeneous sphere floats with half its volume immersed in Mercury and the othe half in the oil .the density of the material of the sphere in g/cc is.

2) the density of ice is Y gram/litre and that of water is X gram/litre. what is the change in volume when M gram of ice melts.

Q. Latent heat of vaporization of a liquid at 500K and 1 ATM pressure is 10 Kcal/mol. What will be the change in internal energy of 3 mol of liquid at same temperature and pressure.

Q.

If a portion of liquid is heated , the molecules in that portion ___________(rise/sink/remain at the same place ).

Q.

The co-efficient of linear expansion of glass is $8\times {10}^{-6}{/}^{o}C$ and the co-efficient of real expansion of mercury is $180\times {10}^{-6}{/}^{0}C$. The co-efficient of apparent expansion of mercury in glass vessel is :

1. $7.5\times {10}^{-6}{/}^{0}C$
2. $204\times {10}^{-6}{/}^{0}C$
3. $18\times {10}^{-5}{/}^{0}C$
4. $156\times {10}^{-6}{/}^{0}C$

Q. Real expansion of liquid == Apparent expansion of liquid ++ Volume expansion of container. Type 1 for true and 0 for false

Q.

The liquid with co-efficient of real expansion of $27\times {10}^{-6}{/}^{o}C$ is heated in a vessel with the coefficient of linear expansion$9\times {10}^{-6}{/}^{o}C$ . The level of the liquid :

1. falls
2. rises
3. remains same
4. first falls then rises

Q. The apparent coefficient of expansion of liquid when heated in a copper vessel is $C$ and when heated in a silver vessel is $S$. If $A$ is the coefficient of linear expansion of copper, coefficient of linear expansion of silver is :

1. $\frac{S+3A-C}{3}$
2. $\frac{C+S+3A}{3}$
3. $\frac{C+3A-S}{3}$
4. $\frac{C+S-3A}{3}$

Q. The real coefficient of volume expansion of glycerine is $0.000597{per}^{o}C$. then apparent volume coefficient of expansion of glycerine is

1. $0.000558{per}^{o}C$
2. $0.000557{per}^{o}C$
3. $0.00066{per}^{o}C$
4. $0.00027{per}^{o}C$