Introduction
This Class 10 Science Mock Test is designed to help students revise important concepts from Physics, Chemistry, and Biology. Try to answer all questions carefully before checking the correct answers. Regular practice of such tests will improve your understanding, accuracy, and confidence for the board examination.
Q1.
Which gas is released when zinc reacts with dilute hydrochloric acid?
A) Oxygen
B) Hydrogen
C) Nitrogen
D) Carbon dioxide
Q2.
The pH value of a neutral solution is:
A) 0
B) 5
C) 7
D) 14
Q3.
Which metal is liquid at room temperature?
A) Copper
B) Mercury
C) Aluminium
D) Iron
Q4.
Which gas is responsible for the greenhouse effect?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Q5.
Which part of the plant prepares food?
A) Root
B) Stem
C) Leaf
D) Flower
Q6.
The unit of electric current is:
A) Volt
B) Ampere
C) Watt
D) Ohm
Q7.
Which vitamin is produced in the human body by sunlight?
A) Vitamin A
B) Vitamin B
C) Vitamin C
D) Vitamin D
Q8.
The speed of light in vacuum is approximately:
A) 3 × 10⁸ m/s
B) 3 × 10⁶ m/s
C) 3 × 10⁴ m/s
D) 3 × 10² m/s
Q9.
Which organ purifies blood in the human body?
A) Liver
B) Heart
C) Kidney
D) Lungs
Q10.
Which acid is present in vinegar?
A) Hydrochloric acid
B) Acetic acid
C) Sulphuric acid
D) Nitric acid
Q11.
The SI unit of electric resistance is:
A) Volt
B) Ohm
C) Ampere
D) Watt
Q12.
Which part of the cell controls all activities?
A) Cytoplasm
B) Nucleus
C) Cell membrane
D) Mitochondria
Q13.
The process by which plants lose water through leaves is called:
A) Respiration
B) Transpiration
C) Photosynthesis
D) Digestion
Q14.
Which mirror is used in vehicles as rear-view mirror?
A) Concave mirror
B) Convex mirror
C) Plane mirror
D) Cylindrical mirror
Q15.
Which gas is used in fire extinguishers?
A) Oxygen
B) Nitrogen
C) Carbon dioxide
D) Hydrogen
Q16.
Which blood cells help in clotting?
A) RBC
B) WBC
C) Platelets
D) Plasma
Q17.
The process of breaking down food to release energy is called:
A) Digestion
B) Respiration
C) Circulation
D) Excretion
Q18.
Which metal is used in electrical wiring?
A) Iron
B) Copper
C) Zinc
D) Lead
Q19.
Which lens is used to correct myopia?
A) Convex lens
B) Concave lens
C) Cylindrical lens
D) Bifocal lens
Q20.
Which gas is necessary for photosynthesis?
A) Oxygen
B) Carbon dioxide
C) Nitrogen
D) Hydrogen
Conclusion
I hope this mock test helped you check your preparation. Keep practicing more questions and revise your concepts regularly. With consistent study and practice, you will perform better in your Class 10 Science exam. Best of luck!