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RRB JE · Topic-wise previous year questions

General Science Previous Year Questions

286 General Science questions asked in RRB JE previous year papers, each with the correct answer and explanation. Read them free on UTpaper, or attempt the full papers as timed online tests.

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Physics: Electricity & Magnetism 59Physics: Light & Sound 32Chemistry: Acids, Bases & Salts 28Chemistry: Reactions 28Physics: Motion & Force 21Biology: Cell & Genetics 19Physics: Heat 18Biology: Plants 17Chemistry: Atoms & Periodic Table 12Biology: Nutrition & Diseases 11Chemistry: Carbon & Compounds 8
Q1RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Fleming’s Left-Hand Rule is used to determine _________.
  1. Athe amount of current flowing through the conductor
  2. Bthe strength of the magnetic field
  3. Cthe direction of force on a current-carrying conductor
  4. Dthe magnitude of the force on a current-carrying conductor
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Correct answer: (C) the direction of force on a current-carrying conductor

Q2RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
What is the term for the band of colours produced when light is dispersed?
  1. AAbsorption
  2. BRefraction
  3. CSpectrum
  4. DReflection
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Correct answer: (C) Spectrum

Q3RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
The chemical name for 'Plaster of Paris' is:
  1. Acalcium sulphate dihydrate
  2. Bcalcium chloride hexahydrate
  3. Ccalcium sulphate hemihydrate
  4. Dcalcium chloride semihydrate
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Correct answer: (C) calcium sulphate hemihydrate

Q4RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
When hydrogen gas is passed through heated black copper (II) oxide, it:
  1. Areduces to form bluish copper solution
  2. Boxidises to form bluish copper solution
  3. Coxidises to form brownish copper metal
  4. Dreduces to form brownish copper metal
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Correct answer: (D) reduces to form brownish copper metal

Q5RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Which of the following is a safety device used to prevent excessive current from flowing in electrical circuits?
  1. ACapacitor
  2. BResistor
  3. CFuse
  4. DTransformer
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Correct answer: (C) Fuse

Q6RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
When sodium sulphate solution is added to barium chloride solution, precipitate of _______ is formed.
  1. Abarium sulphate
  2. Bsodium chloride
  3. Csodium hydrogen sulphate
  4. Dbarium hydrogen sulphate
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Correct answer: (A) barium sulphate

Q7RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
An unsaturated carbohydrate that has a double bond is:
  1. AC₃H₄
  2. BC₃H₆
  3. CC₂H₂
  4. DC₃H₈
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Correct answer: (B) C₃H₆

Q8RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Who was the scientist credited with the discovery of electromagnetic induction?
  1. AMichael Faraday
  2. BNikola Tesla
  3. CIsaac Newton
  4. DThomas Edison
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Correct answer: (A) Michael Faraday

Q9RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
An electric fan becomes warm if used continuously for longer time. This happens due to:
  1. Athe slow rotation of the fan
  2. Bthe fast rotation of the fan
  3. Cheating effect of the current flowing through the fan
  4. Dthe high temperature during the summer
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Correct answer: (C) heating effect of the current flowing through the fan

Q10RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
When washing soda is exposed to hot atmosphere for a long time, it:
  1. Agains water molecules and dissolves in them
  2. Bgains heat from the Sun and becomes dry
  3. Closes water molecules and becomes powdery
  4. Dloses water molecules but remains in crystal form
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Correct answer: (C) loses water molecules and becomes powdery

Q11RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
In a displacement reaction, if a more reactive metal displaces a less reactive metal from its salt solution, what is the result?
  1. AThe less reactive metal is displaced and the more reactive metal becomes a part of the compound
  2. BThe less reactive metal is displaced and solidifies
  3. CThe more reactive metal remains unchanged
  4. DFormation of an insoluble salt
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Correct answer: (D) Formation of an insoluble salt

Explanation

Official answer key: (4) Formation of an insoluble salt Correct answer should be (1). In a displacement reaction the more reactive metal displaces the less reactive metal from its salt solution and itself forms the compound (e.g. Fe + CuSO₄ → FeSO₄ + Cu). Forming an insoluble salt is not the result of a displacement reaction. Scoring follows the official key.

Q12RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Which of the following is NOT true about fragmentation?
  1. AIt requires the organism to be multicellular.
  2. BEach fragment can grow into a complete individual.
  3. CIt involves breaking of the organism into parts.
  4. DIt is a form of sexual reproduction.
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Correct answer: (D) It is a form of sexual reproduction.

Q13RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Which of the following is an example of exothermic combination reaction?
  1. ARespiration
  2. BAmmonium chloride dissolved in water
  3. CPhotosynthesis
  4. DQuick lime dissolved in water
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Correct answer: (D) Quick lime dissolved in water

Q14RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
A rose plant with white flowers was planted in soil by stem cutting without any grafting. The new plant produced similar white flowers. What does it indicate?
  1. AWhite flowers look good so gardeners plant such roses.
  2. BWhite flowers are the only type of variety available in rose.
  3. CStem cutting is a type of sexual reproduction, so there was no variation.
  4. DStem cutting is a type of asexual reproduction, so there was no variation.
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Correct answer: (D) Stem cutting is a type of asexual reproduction, so there was no variation.

Q15RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
What happens when sodium hydroxide reacts with copper (II) sulfate solution?
  1. ANo reaction occurs.
  2. BSodium sulfate is formed.
  3. CCopper metal is deposited.
  4. DCopper(II) hydroxide precipitates.
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Correct answer: (D) Copper(II) hydroxide precipitates.

Q16RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
What type of image does a concave lens form when an object is placed at infinity?
  1. AReal, inverted and same size
  2. BVirtual, erect and point sized
  3. CVirtual, erect and larger
  4. DReal, erect and point sized
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Correct answer: (B) Virtual, erect and point sized

Q17RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Which of the following is the female germ cell in plants?
  1. ACells outside the ovule
  2. BCells in the centre of ovule
  3. CEgg cell
  4. DCell opposite to egg cell in an ovule
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Correct answer: (C) Egg cell

Q18RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
An object is placed at 30 cm from a convex mirror with a focal length of 15 cm. Calculate the image distance (v) using the mirror formula.
  1. A15 cm
  2. B−15 cm
  3. C10 cm
  4. D−10 cm
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Correct answer: (C) 10 cm

Q19RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Neutralisation reaction is a type of:
  1. Acombination reaction
  2. Bdecomposition reaction
  3. Cdisplacement reaction
  4. Ddouble displacement reaction
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Correct answer: (D) double displacement reaction

Q20RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
An electric refrigerator rated 400 W operates 8 hours/day. What is the cost of the energy to operate it for 30 days at ₹3.00 per kW h?
  1. A₹400
  2. B₹36
  3. C₹288
  4. D₹9.6
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Correct answer: (C) ₹288

Q21RRB JE CBT-1, 18 Dec 2024, Shift 3 (4:30 PM)
Which of the following bacterial infections is considered a sexually transmitted disease (STD)?
  1. AGonorrhoea
  2. BTyphoid
  3. CPneumonia
  4. DTuberculosis
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Correct answer: (A) Gonorrhoea

Q22RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which of the following devices operates based on the heating effect of electric current?
  1. ATransformer
  2. BGenerator
  3. CElectric iron
  4. DElectric motor
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Correct answer: (C) Electric iron

Q23RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Mahatma Gandhi started his famous 'Salt march' accompanied by _________ of his trusted volunteers.
  1. A51
  2. B94
  3. C39
  4. D78
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Correct answer: (D) 78

Q24RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which reactants are used to prepare bleaching powder?
  1. ALime and sulphuric acid
  2. BCalcium hydroxide and hydrochloric acid
  3. CChlorine gas and dry calcium hydroxide
  4. DChlorine and water
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Correct answer: (C) Chlorine gas and dry calcium hydroxide

Q25RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which process ensures half the amount of DNA in reproductive cells as compared to non-reproductive cells?
  1. AAmitosis
  2. BMeiosis
  3. CCytokinesis
  4. DMitosis
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Correct answer: (B) Meiosis

Q26RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
The product of the reaction between ethanol and acetic acid is:
  1. Aacetate
  2. Bester
  3. Cmethanol
  4. Dethanal
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Correct answer: (B) ester

Q27RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Baking soda, commonly used in households, is also known by its chemical name:
  1. Acalcium carbonate
  2. Bsodium carbonate
  3. Csodium bicarbonate
  4. Dmagnesium hydroxide
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Correct answer: (C) sodium bicarbonate

Q28RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
When a solution contains an equal number of H⁺ and OH⁻ ions, then the pH of the solution is:
  1. ApH > 12
  2. BpH < 3
  3. CpH > 3 but < 5
  4. DpH = 7
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Correct answer: (D) pH = 7

Q29RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which of the following is an example of regeneration in plants?
  1. ABudding in hydra
  2. BBinary fission in bacteria
  3. CReproduction in humans
  4. DGrowth of a new plant from a cutting
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Correct answer: (D) Growth of a new plant from a cutting

Q30RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
People having acidity problems are treated with antacids that contain which of the following?
  1. ALime water
  2. BMilk of magnesia
  3. CHydrochloric acid
  4. DQuick lime
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Correct answer: (B) Milk of magnesia

Q31RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
When sodium carbonate (Na₂CO₃) is dissolved in water, the resulting solution becomes:
  1. Ahighly reactive with sodium chloride
  2. Bacidic
  3. Cbasic
  4. Dneutral
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Correct answer: (C) basic

Q32RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
A concave mirror can form a real, inverted and magnified image when the object is placed ____________.
  1. Aat the pole
  2. Bbetween the pole and the focus
  3. Cbeyond the centre of curvature
  4. Dbetween the focus and the centre of curvature
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Correct answer: (D) between the focus and the centre of curvature

Q33RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which of the following metals will displace copper from copper sulfate solution?
  1. APlatinum
  2. BSilver
  3. CIron
  4. DGold
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Correct answer: (C) Iron

Q34RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
What is the resistivity (ρ) of a material?
  1. AThe product of voltage and current
  2. BThe amount of current a material can carry
  3. CThe same as its resistance
  4. DA measure of how strongly a material opposes the flow of electric current
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Correct answer: (D) A measure of how strongly a material opposes the flow of electric current

Q35RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
What is the general form of a combination reaction?
  1. AA → B + C
  2. BA + B → AB
  3. CAB + CD → AC + BD
  4. DAB → A + B
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Correct answer: (B) A + B → AB

Q36RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
The sirens of three companies sound together initially and then continue to sound at intervals of 12 minutes, 16 minutes, and 20 minutes, respectively. Over a period of 16 hours and 12 minutes from the time they first sound together, how many times will they sound simultaneously?
  1. A4 times
  2. B3 times
  3. C6 times
  4. D5 times
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Correct answer: (D) 5 times

Q37RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Which of the following modes of asexual reproduction is used by unicellular organisms exclusively?
  1. ARegeneration
  2. BBinary fission
  3. CFragmentation
  4. DSporulation
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Correct answer: (B) Binary fission

Q38RRB JE CBT-1, 18 Dec 2024, Shift 2 (12:45 PM)
Why do stars appear to twinkle when viewed from the Earth?
  1. ARefraction in the Earth’s atmosphere
  2. BDiffraction by clouds
  3. CReflection in the atmosphere
  4. DScattering by particles
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Correct answer: (A) Refraction in the Earth’s atmosphere

Q39RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Which synthetic chemicals are responsible for the depletion of ozone in the atmosphere?
  1. AChlorofluorocarbons (CFCs)
  2. BMethane
  3. CCarbon dioxide
  4. DNitrogen oxides
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Correct answer: (A) Chlorofluorocarbons (CFCs)

Q40RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
In the reaction CuO+H₂→Cu+H₂O, the substance reduced is:
  1. ACuO
  2. BH₂O
  3. CH₂
  4. DCu
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Correct answer: (A) CuO

Q41RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
When lead nitrate is heated, it decomposes to form lead monoxide (PbO), nitrogen dioxide (NO₂), and oxygen (O₂). The brown gas seen during the reaction is:
  1. Anitrogen dioxide (NO₂)
  2. Blead monoxide (PbO)
  3. Coxygen (O₂)
  4. Dnitric oxide (NO)
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Correct answer: (A) nitrogen dioxide (NO₂)

Q42RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
What happens to the resistance of most conductors as their temperature increases?
  1. AIt increases.
  2. BIt remains the same.
  3. CIt decreases.
  4. DIt becomes zero.
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Correct answer: (A) It increases.

Q43RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Which of the following reactions is an example of a precipitation reaction?
  1. ACaCO₃ → CaO + CO₂
  2. BHCl + NaOH → NaCl + H₂O
  3. C2H₂ + O₂ → 2H₂O
  4. DNaCl + AgNO₃ → NaNO₃ + AgCl
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Correct answer: (D) NaCl + AgNO₃ → NaNO₃ + AgCl

Q44RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
What is the reason for CFC free refrigerators being manufactured for use throughout the world?
  1. ACFC is a synthetic chemical which depletes the ozone layer.
  2. BCFC is cheap for use in refrigerators.
  3. CCFC is tough to handle for the refrigeration industry.
  4. DCFC makes refrigeration a tough process.
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Correct answer: (A) CFC is a synthetic chemical which depletes the ozone layer.

Q45RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
What would happen to dead plants and animals if decomposers were absent from an ecosystem?
  1. AThey would be eaten by consumers.
  2. BThey would quickly turn into soil.
  3. CThey would persist, and the natural replenishment of soil would be hindered.
  4. DThey would become producers.
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Correct answer: (C) They would persist, and the natural replenishment of soil would be hindered.

Q46RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Which of the following represents a combination reaction?
  1. ACaO + H₂O → Ca(OH)₂
  2. BCaCO₃ → CaO + CO₂
  3. C2KClO₃ → 2KCl + 3O₂
  4. DNaCl + AgNO₃ → AgCl + NaNO₃
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Correct answer: (A) CaO + H₂O → Ca(OH)₂

Q47RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Why do iron filings arrange themselves in a pattern around a bar magnet?
  1. ABecause they are heavy
  2. BDue to gravitational force
  3. CBecause of the magnetic field
  4. DDue to electric charge
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Correct answer: (C) Because of the magnetic field

Q48RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
If a substance has a pH of 11, which of the following statements is true?
  1. AIt is neutral and does not change the litmus colour.
  2. BIt is basic and can turn red litmus paper blue.
  3. CIt is acidic and can turn blue litmus paper red.
  4. DIt is acidic and does not change the colour of the litmus paper.
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Correct answer: (B) It is basic and can turn red litmus paper blue.

Q49RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
In which direction does the force act on a conductor placed in a magnetic field in an electric motor?
  1. AOpposite to the magnetic field
  2. BIn the direction of the current
  3. CAlong the magnetic field
  4. DPerpendicular to both the current and magnetic field
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Correct answer: (D) Perpendicular to both the current and magnetic field

Q50RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
The potential difference versus current plot for a conducting wire is a straight line. The slope of this line gives us the:
  1. Acurrent flowing through the wire
  2. Bresistance of the wire
  3. Cvoltage across the wire
  4. Dnumber of electrons in the wire
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Correct answer: (B) resistance of the wire

How to use these RRB JE General Science questions

Every question here was asked in a real RRB JE paper; the paper and shift are shown on the card, and the number opens the question on its own page. Try each one before tapping Show answer, then attempt the full RRB JE papers as timed tests to check your speed under exam conditions.

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