Science Practice Set 2025 (Part 1) : 20 Questions

This resource titled Science Practice Set 2025 (Part 1) features 20 randomly selected questions, tailored to help aspirants prepare for exams like RRB, SSC, and other state or central-level government jobs. Each question is presented with multiple-choice options and hidden answers to encourage active recall and self-assessment. Start practicing now and strengthen your science foundation with Work In Assam!

Quick bits

1. What is the unit used to measure pressure?
   
   1. Pascal
   2. Newton
   3. Joule
   4. Watt
   Show Answer
   Pascal
2. What is the correct answer regarding the molecule of carbon dioxide?
   
   1. It has a single bond with each oxygen
   2. It is a solid at room temperature
   3. It acts as a greenhouse gas
   4. It is a part of hydrochloric acid
   Show Answer
   It acts as a greenhouse gas
3. As we move from left to right in a period, the non-metallic character of elements:
   
   1. Decreases
   2. Remains same
   3. Increases
   4. First increases, then decreases
   Show Answer
   Increases
4. Which of the following classifications is based on atomic numbers?
   
   1. Modern Periodic Table
   2. Mendeleev’s Periodic Table
   3. Dobereiner’s Law of Triads
   4. Newlands Law Of Octaves
   Show Answer
   Modern Periodic Table
5. What is the SI unit of electric current?
   
   1. Volt
   2. Ohm
   3. Ampere
   4. Watt
   Show Answer
   Ampere
6. Which of the following is a renewable source of energy?
   
   1. Petroleum
   2. Coal
   3. Natural gas
   4. Solar energy
   Show Answer
   Solar energy
7. A convex lens has a focal length of 50 cm. Calculate its power.
   
   1. 4 D
   2. 1 D
   3. 2 D
   4. 3 D
   Show Answer
   1 D
8. Which of the following is a good conductor of electricity?
   
   1. Glass
   2. Rubber
   3. Copper
   4. Plastic
   Show Answer
   Copper
9. If a body is NOT homogeneous, then its density is a function of its:
   
   1. Mass
   2. Volume
   3. Position
   4. Size
   Show Answer
   Position
10. Ozone at the higher levels of the atmosphere is a product of ______ molecule.
    
    1. UV radiation acting on Hydrogen
    2. UV radiation acting on Oxygen
    3. UV radiation acting on Helium
    4. UV radiation acting on Nitrogen
    Show Answer
    UV radiation acting on Oxygen
11. Henry per meter is the unit of:
    
    1. Permeability
    2. Watt per steradian
    3. Permittivity
    4. Electric conductance
    Show Answer
    Permeability
12. Which of the following metals is NOT obtained by reduction using carbon?
    
    1. Zinc
    2. Sodium
    3. Iron
    4. Copper
    Show Answer
    Sodium
13. The human body works within the pH range of:
    
    1. 6.0 to 7.0
    2. 6.0 to 6.8
    3. 7.0 to 7.8
    4. 7.0 to 8.6
    Show Answer
    7.0 to 7.8
14. The number of electrons that can be accommodated in the M shell is:
    
    1. 18
    2. 8
    3. 2
    4. 32
    Show Answer
    32
15. Which of the following metals reacts vigorously with cold water?
    
    1. Potassium
    2. Aluminium
    3. Zinc
    4. Iron
    Show Answer
    Potassium
16. A continuous and closed path of an electric current is called:
    
    1. Electric circuit
    2. Short circuit
    3. Magnetic circuit
    4. Junction
    Show Answer
    Electric circuit
17. 1 kilowatt hour (kWh) of energy = ______ joule.
    
    1. 3.6 × 10⁶
    2. 1.8 × 10⁴
    3. 1.8 × 10⁶
    4. 3.6 × 10⁴
    Show Answer
    3.6 × 10⁶
18. For dilution of a concentrated acid, we should add:
    
    1. Water into the diluted acid
    2. Water into the concentrated acid
    3. First water into the acid and then more acid into the water
    4. Concentrated acid into water
    Show Answer
    Concentrated acid into water
19. Which of the following is the primary sex organ in man?
    
    1. Prostrate
    2. Testis
    3. Vas deferens
    4. Seminal vesicles
    Show Answer
    Testis
20. Which of the following gases is highly poisonous, odourless, tasteless, and colourless?
    
    1. Carbon dioxide
    2. Carbon monoxide
    3. Methane
    4. Nitrogen dioxide
    Show Answer
    Carbon monoxide

Practicing science questions regularly is key to scoring well in competitive government exams. This set from Science Practice Set 2025 (Part 1) is just the beginning. Stay consistent with your preparation, revise important topics, and make use of self-assessment tools like toggle-answer quizzes. Work In Assam is committed to bringing you reliable, exam-focused content to help you succeed. Keep visiting for more subject-wise practice sets and the latest updates on government job opportunities in Assam and beyond.

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