🧪 General Science MCQ Quiz Hub

1. Which of the following represents ideal gas law?
PVT = constant
PT/V = constant
PV/T = constant
VT/P = constant

2. What do we call the temperature and pressure at which solid, liquid, and vapor phases of a particular substance coexist in equilibrium?
Equilibrium point
Triple point
 Normal point
None of the above

3. Which of the following is the phenomenon responsible for the trade winds?
Convection
Conduction
Radiation
None of the above

4. What is the branch of physics that deals with the concepts of heat and temperature and the inter-conversion of heat and other forms of energy is known as?
Calorimetry
Thermodynamics
Thermostatics
 Electrostatics

5. Which of the following exchanges with the surrounding take place in a closed system?
Both matter and energy
Only energy
Only matter
No exchange

6. What do we call the process in which no exchange of heat energy takes place between the gas and the surroundings?
 Adiabatic
Isothermal
Isochoric
Isobaric

7. Which of the following is correct as per the second law of thermodynamics?
Efficiency of a heat engine can never be zero
Efficiency of a heat engine can never be unity
 Efficiency of a heat engine is always unity
None of the above

8. Which of the following is true about a cyclic process?
the total heat absorbed equals the work done by the system.
the system returns to its initial state
Both a and b
None

9. Which of the following is true about a concave lens?
power of a concave lens is positive
power of a concave lens is negative
 power of a concave lens is zero
None of the above

10. Which of these phenomenon is due to the scattering of light?
blue colour of sky
 reddening of the Sun at sunrise
reddening of the Sun at sunset
All of the above

11. Which of the following eye-defects is also known as far -sightedness?
Myopia
Hyper-metropia
Cataract
None

12. What is the size of the image formed by a concave mirror when the object is at focus?
Enlarged
Point sized
Same size
Highly enlarged

13. For how long approximately an image persists on the retina before vanishing?
 1/8 seconds
1/16 seconds
1/32 seconds
1 second

14. Which of the following mirrors is commonly used as rear-view mirror in a vehicle?
Concave mirror
 Convex mirror
Plain mirror
None of the above

15. What is the work done to move a unit charge from point to another called as?
Current
Resistance
 Conductance
Potential Difference

16. As per Ohm’s law, if the resistance of a conductor is doubled, what will be the effect on the current flowing through it?
 it gets doubled
 it gets halved
it increases 4 times
No change

17. Which of the following is true about metals?
They are good conductors of electricity
They have low resistivity
Both a and b
None of the above

18. Which of the following is correct?
Freely suspended magnet always align in north-south direction
Magnetic poles of a magnet are of equal strength
Both a and b
None of the above

19. Which of the following is NOT correct about the force of interaction between two poles of a magnet, as per coulomb’s law?
directly proportional to the product of the pole strength
directly proportional to the square of the distance r between the poles
Both a and b
None of the above

20. How can a moving coil galvanometer be converted into a ammeter?
by introducing shunt resistance in parallel
by introducing shunt resistance in series
by introducing large resistance in series
None of the above

21. Which of the following element has an isotope named as Tritium?
 Helium
Carbon
Titanium
Hydrogen

22. What are the nuclei of different atoms containing same number of neutrons known as?
 Isobars
 Isotopes
Isotones
Isomers

23. What do we call the phenomenon of spontaneous disintegration of the nucleus of an atom?
 Nuclear Fusion
Ionisation
Radioactivity
Covalent Bonding

24. Which of these rays have the highest penetrating power?
Alpha
Beta
Gamma
 All have the same

25. What happens to the resistance of a p-n junction diode when forward biased?
it becomes high
No effect
it becomes low
it becomes zero

26. What is the ratio of the change in collector current to the change in base current at a constant collector-emitter voltage, when the common emitter transistor is in active state, known as?
 Input resistance
Output resistance
Current amplification factor
None of the above

27. Which of the following is correct about conductors?
The conduction band and the valence band partly overlap each other
There is no forbidden energy band gap between conduction band and the valence band
Both a and b
None of the above