Std 8 Science Chapter 14 Measurement and Effects of Heat. We covered all the Std 8 Science Chapter 14 Measurement and Effects of Heat in this post for free so that you can practice well for the exam.
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Mock Test on Measurement and Effects of Heat for Students
Work done on or by gas, in general, depends upon the :
(A) Initial state only
(B) Final state only
(C) Both initial and final state
(D) Initial state, final state, and the path
Option d – Initial state, final state, and the path
The internal energy is a unique function of any state because the change in U :
(A) Does not depend upon the path
(B) Depends upon the path
(C) Corresponds to an isothermal process
(D) Corresponds to an adiabatic process
Option a – Does not depend upon the path
The amount of work that converts into 1 kcal of heat is :
(A) 4.184 J
(B) 41.84 J
(C) 4184 J
(D) 418.4 J
Option c – 4184 J
The temperature of an ideal gas is kept constant as it expands. The gas does external work. During this process, the internal energy of the gas :
(A) Increases
(B) Decreases
(C) Depending on the molecular motion
(D) Remains constant
Option d – Remains constant
The internal energy of an ideal gas depends on
(A) Specific volume
(B) Pressure
(C) Temperature
(D) Density
Option c – Temperature
The internal energy of the gas increases :
(A) In an adiabatic expansion
(B) In adiabatic compression
(C) In isothermal expansion
(D) In isothermal compression
Option b – In adiabatic compression
In a thermodynamic system, a working substance is an ideal gas, its internal energy is in the form of :
(A) Kinetic energy only
(B) Kinetic and potential energy
(C) Potential energy
(D) None of these
Option a – Kinetic energy only
If a system undergoes contraction of volume, then the work done on the system is :
(A) Positive
(B) Negative
(C) Negligible
(D) Zero
Option b – Negative
What happens to the internal energy of gas during isothermal expansion? :
(A) Internal energy will increase
(B) Internal energy will decrease
(C) Internal energy will remain constant
(D) Internal energy will become zero
Option c – Internal energy will remain constant
We covered all the std 8 science chapter 14 measurement and effects of heat above in this post for free so that you can practice well for the exam.
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