The First Law of Thermodynamics (Concept of Work, Heat Internal Energy and Enthalpy, Heat Capacity,...) NEET Questions

Physical Chemistry - Chemical Thermodynamics

The First Law of Thermodynamics (Concept of Work, Heat Internal Energy and Enthalpy, Heat Capacity,...) MCQ Questions


7.
For a cyclic process, the total internal energy change is
A.
Positive
B.
Negative
C.
Zero
D.
Depends on the process
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ANSWER :
C. Zero
8.
Enthalpy of atomization is the enthalpy change when

NEET - 2020

A.
One mole of atoms is formed
B.
One mole of a compound is formed
C.
One mole of ions is formed
D.
One mole of bonds is broken
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ANSWER :
A. One mole of atoms is formed
9.
Which of the following enthalpy changes is always positive?
A.
Combustion
B.
Formation
C.
Atomization
D.
Neutralization
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ANSWER :
C. Atomization
10.

Which of the following has the highest standard enthalpy of formation?

A.

CO2

B.

CH4

C.

H2O

D.

C2H6

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ANSWER :

B. CH4

11.
Heat capacity is defined as
A.
Heat required to raise temperature by 1 K
B.
Heat required to change state
C.
Heat required to form one mole of a substance
D.
Heat released in combustion
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ANSWER :
A. Heat required to raise temperature by 1 K
12.

Molar heat capacity at constant volume is represented as

A.

Cv

B.

Cp

C.

Cm

D.

Cx

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ANSWER :

A. Cv