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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
In general, the work done by or on a gas depends on which of the following?
a) Only the initial condition
b) Only the final condition
c) Both the initial and final conditions
d) The initial condition, final condition, and the process followed
Option d – The initial condition, final condition, and the process followed
Why is internal energy considered a state function?
a) Its change is independent of the path taken
b) Its change varies with the path
c) It is related only to isothermal processes
d) It is associated only with adiabatic processes
Option a – Its change is independent of the path taken
How much mechanical work is equivalent to 1 kilocalorie of Heat?
a) 4.184 J
b) 41.84 J
c) 4184 J
d) 418.4 J
Option c – 4184 J
When an ideal gas expands at constant temperature and performs external work, what happens to its internal energy?
a) It increases
b) It decreases
c) It depends on Molecular motion
d) It remains unchanged
Option d – It remains unchanged
The internal energy of an ideal gas is determined by which factor?
a) Specific volume
b) Pressure
c) Temperature
d) Density
Option c – Temperature
Under which condition does the internal energy of a gas increase?
a) Adiabatic expansion
b) Adiabatic compression
c) Isothermal expansion
d) Isothermal compression
Option b – Adiabatic compression
In an ideal gas, the internal energy consists of which form of energy?
a) Only kinetic energy
b) Both kinetic and potential energy
c) Only potential energy
d) None of these
Option a – Only kinetic energy
If the volume of a system decreases, the work done on the system is considered to be:
a) Positive
b) Negative
c) Negligible
d) Zero
Option b – Negative
During isothermal expansion of a gas, what change occurs in its internal energy?
a) It increases
b) It decreases
c) It remains constant
d) It becomes zero
Option c – It remains 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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