BPSC TRE Class 6-8 Science Questions: 30 Important MCQs & Answers
Practise 30 BPSC TRE Class 6-8 Science questions with answers across all five exam topics, then check your weak areas and move to a free full mock test.
Short on time and revising for BPSC TRE 4.0 alongside a job or family, these BPSC TRE Class 6-8 science questions give you a fast way to check where you really stand. The 30 questions come with answers and cover every major topic — Changes and Materials, Matter and Chemistry, Numericals, Physical World, and Science and Scientists — so you can spot weak areas in one short sitting and revise the Class 6-8 Science paper the smart way.
Here is the honest way to use this set: attempt all 30 questions on your own first, without looking at the answers. Only after you finish should you check the solutions and mark the ones you got wrong. Those wrong questions are your real syllabus for this week — not the whole book.
How to use these BPSC TRE Class 6-8 science questions
You do not need long hours to use this set well. A focused half-hour is enough if you follow these simple steps.
- Attempt first, answers later: Give yourself about 25-30 minutes and solve all 30 without peeking. This shows your true level, not a flattering one.
- Sort your mistakes by topic: See whether you slip most in Changes and Materials, Matter and Chemistry, Numericals, Physical World or Science and Scientists, and revise that one topic first.
- Treat Numericals as practice, not guesswork: Write each step on paper. If you guessed and still got it right, mark it weak and redo it later.
- Move to a full-length paper: Once these feel easy, take the free Full Mock Test 1, then use the full BPSC TRE 4.0 Class 6-8 Maths & Science mock test series — 60 tests and 2,322 questions for ₹49 — to practise under real exam pressure.
30 BPSC TRE Class 6-8 Science Questions with Answers
Numericals
An object covers 350 m in 25 s. What is its speed?
- (A) 8750 m/s
- (B) 16 m/s
- (C) 25 m/s
- (D) 14 m/s
Answer: (D) 14 m/s
Explanation: Speed = distance ÷ time = 350 ÷ 25 = 14 m/s.
A girl stands 4 m in front of a plane mirror. What is the distance between her and her image?
- (A) 16 m
- (B) 8 m
- (C) 6 m
- (D) 4 m
Answer: (B) 8 m
Explanation: Image is as far behind the mirror as the object is in front: 4 + 4 = 8 m.
A force of 135 N acts on an area of 0.25 m². What is the pressure?
- (A) 550 Pa
- (B) 540 Pa
- (C) 1080 Pa
- (D) 75 Pa
Answer: (B) 540 Pa
Explanation: Pressure = force ÷ area = 135 ÷ 0.25 = 540 Pa.
A pendulum completes 50 oscillations in 95 seconds. What is its time period?
- (A) 4 s
- (B) 8 s
- (C) 5 s
- (D) 9 s
Answer: (D) 9 s
Explanation: Time period = total time ÷ oscillations = 95 ÷ 50 = 1.9 s.
A force of 7 N acts on an area of 0.1 m². What is the pressure?
- (A) 140 Pa
- (B) 7 Pa
- (C) 70 Pa
- (D) 80 Pa
Answer: (C) 70 Pa
Explanation: Pressure = force ÷ area = 7 ÷ 0.1 = 70 Pa.
A pendulum completes 10 oscillations in 28 seconds. What is its time period?
- (A) 14 s
- (B) 8 s
- (C) 6 s
- (D) 3 s
Answer: (B) 8 s
Explanation: Time period = total time ÷ oscillations = 28 ÷ 10 = 2.8 s.
A force of 600 N acts on an area of 2 m². What is the pressure?
- (A) 310 Pa
- (B) 600 Pa
- (C) 1200 Pa
- (D) 300 Pa
Answer: (D) 300 Pa
Explanation: Pressure = force ÷ area = 600 ÷ 2 = 300 Pa.
A force of 320 N acts on an area of 2 m². What is the pressure?
- (A) 320 Pa
- (B) 640 Pa
- (C) 160 Pa
- (D) 170 Pa
Answer: (C) 160 Pa
Explanation: Pressure = force ÷ area = 320 ÷ 2 = 160 Pa.
Matter and Chemistry
The reaction between an acid and a base is called:
- (A) Rusting
- (B) Fermentation
- (C) Oxidation
- (D) Neutralisation
Answer: (D) Neutralisation
Explanation: Products are salt and water.
The lowest temperature at which a substance catches fire is its:
- (A) Boiling point
- (B) Freezing point
- (C) Melting point
- (D) Ignition temperature
Answer: (D) Ignition temperature
Explanation: Kerosene has a lower ignition temperature than wood.
Rusting of iron requires:
- (A) Only water
- (B) Only oxygen
- (C) Only heat
- (D) Both oxygen and water (moisture)
Answer: (D) Both oxygen and water (moisture)
Explanation: Rust is iron oxide.
Ursa Major is also known as:
- (A) Saptarishi (Great Bear)
- (B) Orion
- (C) Cassiopeia
- (D) Milky Way
Answer: (A) Saptarishi (Great Bear)
Explanation: Seven prominent stars.
India's first artificial satellite was:
- (A) Bhaskara
- (B) Aryabhata
- (C) INSAT
- (D) Chandrayaan
Answer: (B) Aryabhata
Explanation: Launched in 1975.
Acid rain is caused mainly by:
- (A) Argon
- (B) Oxygen
- (C) Water vapour
- (D) Sulphur dioxide and nitrogen dioxide
Answer: (D) Sulphur dioxide and nitrogen dioxide
Explanation: They dissolve in rain water.
The gas mainly responsible for the greenhouse effect is:
- (A) Carbon dioxide
- (B) Nitrogen
- (C) Hydrogen
- (D) Oxygen
Answer: (A) Carbon dioxide
Explanation: Methane also contributes.
Changes and Materials
Which of these is a good conductor of electricity: Cotton thread, Silver spoon, Thermocol or Paper?
- (A) Silver spoon
- (B) Thermocol
- (C) Cotton thread
- (D) Paper
Answer: (A) Silver spoon
Explanation: Silver spoon — it allows electric current to pass.
Which of these is an insulator: Dry wood, Iron nail, Steel key or Aluminium foil?
- (A) Dry wood
- (B) Aluminium foil
- (C) Steel key
- (D) Iron nail
Answer: (A) Dry wood
Explanation: Dry wood — it does not allow current to pass.
Which of these is a good conductor of electricity: Graphite (pencil lead), Eraser, Dry wood or Glass?
- (A) Dry wood
- (B) Glass
- (C) Eraser
- (D) Graphite (pencil lead)
Answer: (D) Graphite (pencil lead)
Explanation: Graphite (pencil lead) — it allows electric current to pass.
Which of these is a good conductor of electricity: Plastic scale, Rubber, Paper or Iron nail?
- (A) Paper
- (B) Iron nail
- (C) Rubber
- (D) Plastic scale
Answer: (B) Iron nail
Explanation: Iron nail — it allows electric current to pass.
Which of these is a good conductor of electricity: Paper, Dry wood, Silver spoon or Eraser?
- (A) Eraser
- (B) Silver spoon
- (C) Paper
- (D) Dry wood
Answer: (B) Silver spoon
Explanation: Silver spoon — it allows electric current to pass.
Which of these is an insulator: Graphite (pencil lead), Silver spoon, Glass or Copper wire?
- (A) Silver spoon
- (B) Copper wire
- (C) Graphite (pencil lead)
- (D) Glass
Answer: (D) Glass
Explanation: Glass — it does not allow current to pass.
Which of these is transparent: Frosted glass, Iron sheet, Oiled paper or Clean water?
- (A) Frosted glass
- (B) Oiled paper
- (C) Clean water
- (D) Iron sheet
Answer: (C) Clean water
Explanation: Clean water — light passes through it fully, so objects are clearly seen.
Physical World
Loudness of sound depends on its:
- (A) Amplitude
- (B) Speed
- (C) Colour
- (D) Frequency
Answer: (A) Amplitude
Explanation: Measured in decibels (dB).
If a car covers equal distances in equal intervals of time, its motion is:
- (A) Periodic
- (B) Circular
- (C) Uniform
- (D) Non-uniform
Answer: (C) Uniform
Explanation: Speed remains constant.
An electric bell works on the:
- (A) Lighting effect
- (B) Magnetic effect of current
- (C) Heating effect only
- (D) Chemical effect
Answer: (B) Magnetic effect of current
Explanation: Uses an electromagnet.
A sharp knife cuts better than a blunt one because it:
- (A) Has less force
- (B) Is longer
- (C) Exerts more pressure due to smaller area
- (D) Is heavier
Answer: (C) Exerts more pressure due to smaller area
Explanation: Pressure = force/area.
Shoes have treaded soles to:
- (A) Increase friction for better grip
- (B) Reduce friction
- (C) Look nice only
- (D) Reduce weight
Answer: (A) Increase friction for better grip
Explanation: Prevents slipping.
Splitting of white light into seven colours is called:
- (A) Dispersion
- (B) Reflection
- (C) Absorption
- (D) Diffusion
Answer: (A) Dispersion
Explanation: A rainbow is a natural example.
The range of a clinical thermometer is:
- (A) −10°C to 110°C
- (B) 0°C to 100°C
- (C) 20°C to 50°C
- (D) 35°C to 42°C
Answer: (D) 35°C to 42°C
Explanation: Laboratory thermometers range from −10°C to 110°C.
Science and Scientists
Robert Brown is known for:
- (A) Periodic table
- (B) Discovery of the nucleus
- (C) Electromagnetic induction
- (D) Electric bulb
Answer: (B) Discovery of the nucleus
Explanation: Discovery of the nucleus: Robert Brown.
Take a full mock test
Start with the free mock test: Full Mock Test 1 — timed, with your score and analysis right away.
These questions come from SeatBeat's reviewed question bank. For full preparation, see the test series: BPSC TRE 4.0 (Class 6-8) Maths & Science Mock Test Series
Frequently asked questions
Which topics do these BPSC TRE Class 6-8 Science questions cover?
These questions cover the five main areas of the Class 6-8 Science paper: Changes and Materials, Matter and Chemistry, Numericals, Physical World, and Science and Scientists. Each one comes with its answer so you can check yourself.
Are these BPSC TRE Class 6-8 Science questions free to practise?
Yes, all 30 questions and answers on this page are free. You can also attempt the free Full Mock Test 1 without paying, and move to the paid series only when you feel ready.
How should I practise Science numericals for BPSC TRE 4.0?
Always write each step on paper instead of solving in your head. If you reach the right answer by guessing, still treat that question as weak and redo it later so the method becomes a habit.
Is there a full BPSC TRE 4.0 Class 6-8 Maths and Science mock test series?
Yes. The BPSC TRE 4.0 (Class 6-8) Maths & Science Mock Test Series has 60 tests with 2,322 questions for ₹49. Start with the free Full Mock Test 1, then continue with the full series for timed, exam-like practice.
Can I prepare for BPSC TRE Class 6-8 Science while doing a job?
Yes, if you study in short, regular sittings and focus only on your weak topics. Using a question set like this one and a mock test keeps your limited time pointed at what actually needs work.
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