Thermal Properties of Matter Test

Result

Thermal Properties of Matter Test - 71

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Weekly Quiz Competition

Question 1
1 / -0

50 gm of copper is heated to increase its temperature by $${ 10 }^{ \circ }C$$ . If the same quantity of heat is given to 10gm of water, the rise in its temperature is ( Specific heat of copper = $$420\quad Joule-{ kg }^{ -1 }{ C }^{ -1 }$$ )

A
$${ 5 }^{ \circ }C$$

B
$${ 6 }^{ \circ }C$$

C
$${ 7 }^{ \circ }C$$

D
$${ 8 }^{ \circ }C$$

Solution
Question 2
1 / -0

Three slabs of equal area and thickness are arranged as shown in the figure. Find the value of $$T_1$$ and $$T_2$$ in steady state:

A
$$68^oC$$&$$52^oC$$

B
$$62^oC$$&$$58^oC$$

C
$$60^oC$$&$$50^oC$$

D
$$50^oC$$&$$30^oC$$
Question 3
1 / -0

An ideal gas with pressure $$P$$, volume $$V$$ and temperature $$T$$ is expanded isothermally to a volume $$2V$$ and a final pressure $${P}_{I}$$. The same gas is expanded adiabatically to a volume $$2V$$, the final pressure is $${P}_{A}$$. In terms of the ratio of the two specific heats for the gas $$\gamma$$, the ratio $${P}_{I}/{P}_{A}$$ is:

A
$${2}^{\gamma-1}$$

B
$${2}^{1-\gamma}$$

C
$${2}^{\gamma}$$

D
$$2\gamma$$

Solution
Question 4
1 / -0

The value of the gas constant (R) calculated from the perfect gas equation is $$8.32 \,Joule/gm \,mol \,K$$, whereas its value calculated from the knowledge of $$C_p$$ and $$C_v$$ of the gas is $$1.98 \,cal/gm \,mole \,K$$. from this data, the value of $$J$$ is

A
$$4.16 \,J/cal$$

B
$$4.18 \,J/cal$$

C
$$4.20 \,J/cal$$

D
$$4.22 \,J/cal$$

Solution
Question 5
1 / -0

One mole of gas ''A'' and 2 moles of S$${ O }_{ 2 }$$ are placed in a container,gaseous can be:

A
$${ H }_{ 2 }$$

B
$$C{ H }_{ 4 }$$

C
He

D
$${ D }_{ 2 }$$
Question 6
1 / -0

A solid whose volume does not change with temperature floats in a liquid. For two different temperatures $$ t_{1} $$ and$$ t_{2} $$ of the liquid, fractions $$ f_{1} $$ and $$ f_{2} $$ of the volume of the solid remain submerged in the liquid. The coefficient of volume expansion of the liquid is equal to

A
$$
\frac{f_{1}-f_{2}}{f_{2} t_{1}-f_{1} t_{2}}
$$

B
$$
\frac{f_{1}-f_{2}}{f_{1} t_{1}-f_{2} t_{2}}
$$

C
$$ \frac{f_{1}+f_{2}}{f_{2} t_{1}+f_{1} t_{2}} $$

D
$$
\frac{f_{1}+f_{2}}{f_{1} t_{1}+f_{2} t_{2}}
$$

Solution
Question 7
1 / -0

When the temperature difference between in side and outside of a room is $$20 $$ the rate of heat flow through a window is 273 J/s. If the temperature difference becomes 20K, the rate of flow of heat through the same window will be:

A
253 J/s

B
273 J/s

C
293 J/s

D
None of these

Solution
Question 8
1 / -0

When water is heated from $$0^0$$C to $$10^0$$C, its volume -

A
increases

B
decreases

C
does not change

D
first decreases and then increases
Question 9
1 / -0

On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are $${39^\circ }\,W$$ and $${239^\circ }\,W$$ respectively. What will be the temperature on the new scale, corresponding to a temperature of $${39^\circ }$$ on the Celsius scale?

A
$${139^\circ }W$$

B
$${78^\circ }W$$

C
$${117^\circ }W$$

D
$${200^\circ }W$$

Solution
Question 10
1 / -0

For $$N_2$$the value of $$C_p-C_v$$=

A
$$14R$$

B
$$\frac {R}{14}$$

C
$$28 R$$

D
$$\frac {R}{28}$$

Solution