Thermodynamics Test

Result

Thermodynamics Test - 17

Score
-
out of -
Rank
-
out of -

TIME Taken - -

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Weekly Quiz Competition

Question 1
1 / -0

The volume of $$1 m^3$$ of gas is doubled at atmospheric pressure. The work done at constant pressure will be

A
$$0$$

B
$$10^5\ cal$$

C
$$10^5\ J$$

D
$$10^5\ erg$$

Solution

Work done in a isobaric process is given as $$W=P(V_f-V_i)=1\times 10^5(2-1)=1\times 10^5 J$$
Question 2
1 / -0

Milk is poured into a cup of tea and is mixed with a spoon. It is an example of

A
reversible process

B
irreversible process

C
adiabatic process

D
isothermal process

Solution

Since during mixing no heat is lost to the surroundings, it is treated as adiabatic process.
Hence, Option C is correct.
Question 3
1 / -0

The isothermal bulk modulus of elasticity of a gas is $$1.5 \times 10^5 $$ $${ Nm }^{ -2 }$$. Its adiabatic bulk modulus of elasticity will be (if $$\gamma$$ = 1.4)

A
$$ 3 \times 10^5 Nm^{-2}$$

B
$$ 2.1 \times 10^5 Nm^{-2}$$

C
$$ 1.5 \times 10^5 Nm^{-2}$$

D
$$\infty$$

Solution

$$E_{iso}=1.5\times 10^5 Nm^{-2}$$.
$$E_{adia}=\gamma E_{iso}=1.4\times 1.5\times 10^5 Nm^{-2}=2.1\times 10^5 Nm^{-2}$$
Question 4
1 / -0

At the boiling point of water the saturated vapour pressure will be (in mm of Hg)

A
750

B
760

C
850

D
860

Solution

The boiling point of water is defined as the temperature at which the partial pressures of the water and steam are equal and thus equal to 760mm of Hg.
Question 5
1 / -0

The concept of temperature is related to

A
zeroeth law of thermodynamics

B
first law of thermodynamics

C
second law of thermodynamics

D
third law of thermodynamics

Solution

The zeroth law of thermodynamics states that that if two thermodynamic systems are each in thermal equilibrium with a third, then all three are in thermal equilibrium with each other. It is the law of thermal equilibrium.
Question 6
1 / -0

When a hot liquid is mixed with a cold liquid, the temperature of the mixture

A
first decreases and then becomes constant

B
first increases and then becomes constant

C
continuosly increases

D
is undefined for some time and then becomes nearly constant

Solution

Initially when the two liquids are mixed the temperature is undefined because there is heat exchange between the liquids . There exists a transient phase after which it will reach an equilibrium . This equilibrium temperature can be found by conserving energy .
Question 7
1 / -0

How many dead centres are there in one cycle of steam engine ?

A
$$4$$

B
$$3$$

C
$$2$$

D
$$1$$
Solution
There are two dead centers in one cycle of the steam engine:
- Top dead center
- Bottom dead center
Hence option C is correct.
Question 8
1 / -0

The first Law of thermodynamics expresses

A
law of conservation of momentum

B
law of conservation of energy

C
law of conservation of mass

D
All of the above

Solution

The first law of thermodynamics is based on the law of conservation of energy.
Question 9
1 / -0

A point on P - V diagram represents

A
the condition of a system

B
work done on or by the system

C
work done in a cyclic process

D
a thermodynamic process

Solution

Every point on this isothermal curve represents the condition of a system.
Question 10
1 / -0

Heating of a wheel on applying brakes is due to the relation

A
$$P\propto \dfrac{1}{V}$$

B
$$P\propto T $$

C
$$W\propto Q$$

D
$$V\propto T$$

Solution

The work is done due to friction which gets converted to heat.

User

Question Analysis

Correct -
Wrong -
Skipped -

My Perfomance

Score
-
out of -
Rank
-
out of -

Re-Attempt Weekly Quiz Competition

Thermodynamics Test - 17

Result

Thermodynamics Test - 17

Score

-

Rank

-

SHARING IS CARING

Question 1

$$0$$

$$10^5\ cal$$

$$10^5\ J$$

$$10^5\ erg$$

Solution

Question 2

reversible process

irreversible process

adiabatic process

isothermal process

Solution

Question 3

$$ 3 \times 10^5 Nm^{-2}$$

$$ 2.1 \times 10^5 Nm^{-2}$$

$$ 1.5 \times 10^5 Nm^{-2}$$

$$\infty$$

Solution

Question 4

750

760

850

860

Solution

Question 5

zeroeth law of thermodynamics

first law of thermodynamics

second law of thermodynamics

third law of thermodynamics

Solution

Question 6

first decreases and then becomes constant

first increases and then becomes constant

continuosly increases

is undefined for some time and then becomes nearly constant

Solution

Question 7

$$4$$

$$3$$

$$2$$

$$1$$

Solution

Question 8

law of conservation of momentum

law of conservation of energy

law of conservation of mass

All of the above

Solution

Question 9

the condition of a system

work done on or by the system

work done in a cyclic process

a thermodynamic process

Solution

Question 10

$$P\propto \dfrac{1}{V}$$

$$P\propto T $$

$$W\propto Q$$

$$V\propto T$$

Solution

User

Question Analysis

My Perfomance

Score

-

Rank

-

Results Announcement on: coming Monday

Stay Tuned: We’ll update you on your result via email or SMS.