Thursday, February 20, 2025

TNPSC NEW SYLLABUS – SCIENCE 150 IMPORTANT QUESTION AND ANSWER

 

Q1. Which of the following is the largest planet in our solar system?
a) Earth
b) Mars
c) Jupiter
d) Venus

Answer: c) Jupiter

Q2. What is the primary source of energy for the Earth?
a) Moon
b) Sun
c) Stars
d) Earth's core

Answer: b) Sun

Q3. The SI unit of force is:
a) Pascal
b) Joule
c) Newton
d) Watt

Answer: c) Newton

Q4. What is the unit of electric current?
a) Volt
b) Ampere
c) Coulomb
d) Ohm

Answer: b) Ampere

Q5. Newton's First Law of Motion is also known as:
a) Law of Acceleration
b) Law of Inertia
c) Law of Action-Reaction
d) Law of Gravity

Answer: b) Law of Inertia

Q6. The acceleration due to gravity on the surface of the Earth is approximately:
a) 8.9 m/s²
b) 9.8 m/s²
c) 10.5 m/s²
d) 12.2 m/s²

Answer: b) 9.8 m/s²

Q7. Which of the following has the highest pressure?
a) A person standing on one foot
b) A person lying down
c) A person sitting on a chair
d) A person wearing snowshoes

Answer: a) A person standing on one foot

Q8. Energy stored in a stretched rubber band is:
a) Kinetic Energy
b) Potential Energy
c) Heat Energy
d) Sound Energy

Answer: b) Potential Energy

Q9. Which type of mirror is used in a car’s rearview mirror?
a) Plane mirror
b) Concave mirror
c) Convex mirror
d) Parabolic mirror

Answer: c) Convex mirror

Q10. The speed of sound is maximum in:
a) Air
b) Water
c) Steel
d) Vacuum

Answer: c) Steel

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Q127. The main source of renewable energy is:
a) Coal
b) Petrol
c) Solar power
d) Natural gas

Answer: c) Solar power

Q128. Deforestation leads to an increase in:
a) Oxygen level
b) Carbon dioxide level
c) Soil fertility
d) None of the above

Answer: b) Carbon dioxide level

Q129. Sound cannot travel through:
a) Solids
b) Liquids
c) Gases
d) Vacuum

Answer: d) Vacuum

Q130. The speed of sound in air at room temperature is approximately:
a) 330 m/s
b) 1500 m/s
c) 5000 m/s
d) 3 × 10⁸ m/s

Answer: a) 330 m/s

Q131. The process in which a substance reacts with oxygen to release energy is called:
a) Oxidation
b) Reduction
c) Combustion
d) Neutralization

Answer: c) Combustion

Q132. Which gas is released during photosynthesis?
a) Oxygen
b) Carbon dioxide
c) Hydrogen
d) Nitrogen

Answer: a) Oxygen

Q133. The primary function of the lungs is to:
a) Pump blood
b) Filter waste
c) Exchange gases
d) Digest food

Answer: c) Exchange gases

Q134. The smallest bone in the human body is found in the:
a) Leg
b) Arm
c) Ear
d) Skull

Answer: c) Ear

Q135. Biodegradable waste includes:
a) Plastic
b) Glass
c) Paper
d) Metal

Answer: c) Paper

Q136. The best method to dispose of plastic waste is:
a) Incineration
b) Dumping in landfills
c) Recycling
d) Burning in open air

Answer: c) Recycling

Q137. The SI unit of electric power is:
a) Ohm
b) Watt
c) Ampere
d) Volt

Answer: b) Watt

Q138. The device that converts chemical energy into electrical energy is:
a) Generator
b) Transformer
c) Battery
d) Motor

Answer: c) Battery

Q139. Which of the following is a chemical fertilizer?
a) Urea
b) Compost
c) Manure
d) Vermicompost

Answer: a) Urea

Q140. DDT is a type of:
a) Fertilizer
b) Pesticide
c) Herbicide
d) Fungicide

Answer: b) Pesticide

Q141. The female reproductive organ in flowering plants is called:
a) Stamen
b) Carpel
c) Petal
d) Sepal

Answer: b) Carpel

Q142. The process by which plants lose water in the form of vapor is called:
a) Photosynthesis
b) Transpiration
c) Respiration
d) Germination

Answer: b) Transpiration

Q143. Which gas is known as a greenhouse gas?
a) Oxygen
b) Carbon dioxide
c) Argon
d) Helium

Answer: b) Carbon dioxide

Q144. The Kyoto Protocol is related to:
a) Ozone layer protection
b) Climate change
c) Water conservation
d) Deforestation

Answer: b) Climate change

Q145. Which of the following is used as a nuclear fuel?
a) Uranium
b) Copper
c) Aluminium
d) Lead

Answer: a) Uranium

Q146. The energy produced in nuclear reactors is due to:
a) Combustion
b) Fission
c) Fusion
d) Radiation

Answer: b) Fission

Q147. Which chemical is used to adulterate milk?
a) Formalin
b) Citric acid
c) Sodium chloride
d) Baking soda

Answer: a) Formalin

Q148. Consumption of adulterated food can lead to:
a) Improved immunity
b) Various diseases
c) Faster digestion
d) Stronger bones

Answer: b) Various diseases

Q149. The first human spaceflight program of ISRO is called:
a) Mangalyaan
b) Gaganyaan
c) Chandrayaan
d) Aditya

Answer: b) Gaganyaan

Q150. India’s first solar mission launched by ISRO is:
a) Chandrayaan-3
b) Aditya-L1
c) Mangalyaan-2
d) RISAT

Answer: b) Aditya-L1

 

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TNPSC NEW SYLLABUS – SCIENCE 150 IMPORTANT QUESTION AND ANSWER

  Q1. Which of the following is the largest planet in our solar system? a) Earth b) Mars c) Jupiter d) Venus ✅ Answer: c) Jupiter ...