Thermal Expansion, Thermometry And Calorimetry Test

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Thermal Expansion, Thermometry And Calorimetry Test - 4

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Weekly Quiz Competition

Question 1
4 / -1

When a copper ball is heated, the largest percentage increase will occur in its [EAMCET 1992]

A
Diameter

B
Area

C
Volume

D
Density

Solution

When a copper ball is heated, it?s size increases. As Volume µ(radius)3 and Area µ ((radius)2, so percentage increase will be largest in it?s volume. Density will decrease with rise in temperature.
Question 2
4 / -1

A vertical column 50 cm long at 50ºC balances another column of same liquid 60 cm long at 100ºC. The coefficient of absolute expansion of the liquid is [EAMCET 1990]

A
0.005/ºC

B
0.0005/ºC

C
0.002/ºC

D
0.0002/ºC
Question 3
4 / -1

The apparent coefficient of expansion of a liquid when heated in a copper vessel is C and when heated in a silver vessel is S. If A is the linear coefficient of expansion of copper, then the linear coefficient of expansion of silver is [EAMCET 1991]

A
(C+S−3A)/3

B
(C-S+3A)/3

C
(-C+S+3A)/3

D
(C+S+3A)/3
Question 4
4 / -1

When a rod is heated but prevented from expanding, the stress developed is independent of [EAMCET 1997]

A
Material of the rod

B
Rise in temperature

C
Length of rod

D
None of above
Question 5
4 / -1

Expansion during heating [CBSE PMT 1994]

A
Occurs only in solids

B
Increases the weight of a material

C
Decreases the density of a material

D
Occurs at the same rate for all liquids and solids

Solution

Solids, liquids and gases all expand on being heated as result density (= mass/volume) decreases.
Question 6
4 / -1

On heating a liquid of coefficient of cubical expansion g in a container having coefficient of linear expansion g / 3, the level of liquid in the container will [EAMCET 1993]

A
Rise

B
Fall

C
Will remain almost stationary

D
It is difficult to say

Solution

Coefficient in the linear equation is same ‘g’ & ‘g/3’
Question 7
4 / -1

540 g of ice at 0ºC is mixed with 540 g of water at 80ºC. The final temperature of the mixture is [AFMC 1994]

A
0ºC

B
40ºC

C
80ºC

D
Less than 0ºC
Question 8
4 / -1

Water is used to cool radiators of engines, because [AFMC 2001]

A
Of its lower density

B
It is easily available

C
It is cheap

D
It has high specific heat

Solution

Due to large specific heat of water, it releases large heat with very small temperature change.
Question 9
4 / -1

How much heat energy is gained when 5 kg of water at 20ºC is brought to its boiling point (Specific heat of water = 4.2 kJ kg^-1cº^-1) [BHU 2001]

A
1680 kJ

B
1700 kJ

C
1720 kJ

D
1740 kJ

Solution

Q=m.c.Δθ=5×(1000×4.2)×(100−20)
=1680×103J=1680kJ
Question 10
4 / -1

Heat required to convert one gram of ice at 0ºC into steam at 100?C is (given L_steam = 536 cal/gm) [Pb. PMT 1990]

A
100 calorie

B
0.01 kilocalorie

C
716 calorie

D
1 kilocalorie

Solution

Conversion of ice (0°C) into steam (100°C) is as follows Heat required in the given process =Q1+Q2+Q3=1×80+1×1×(100−0)+1×536=716cal

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Re-Attempt Weekly Quiz Competition

Thermal Expansion, Thermometry And Calorimetry Test - 4

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Thermal Expansion, Thermometry And Calorimetry Test - 4

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SHARING IS CARING

Question 1

Diameter

Area

Volume

Density

Solution

Question 2

0.005/ºC

0.0005/ºC

0.002/ºC

0.0002/ºC

Question 3

(C+S−3A)/3

(C-S+3A)/3

(-C+S+3A)/3

(C+S+3A)/3

Question 4

Material of the rod

Rise in temperature

Length of rod

None of above

Question 5

Occurs only in solids

Increases the weight of a material

Decreases the density of a material

Occurs at the same rate for all liquids and solids

Solution

Question 6

Rise

Fall

Will remain almost stationary

It is difficult to say

Solution

Question 7

0ºC

40ºC

80ºC

Less than 0ºC

Question 8

Of its lower density

It is easily available

It is cheap

It has high specific heat

Solution

Question 9

1680 kJ

1700 kJ

1720 kJ

1740 kJ

Solution

Question 10

100 calorie

0.01 kilocalorie

716 calorie

1 kilocalorie

Solution

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