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RRB JE · Topic-wise previous year questions

General Science Previous Year Questions (page 3)

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
Q101RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Seeds that are dispersed by animals often:
  1. Ahave hooks or edible flesh
  2. Bare very small and light weight
  3. Chave wings or parachutes
  4. Dcan float easily in water
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Correct answer: (A) have hooks or edible flesh

Q102RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
In the process of vegetative propagation, which part of the plant is used in grafting?
  1. AStem
  2. BLeaf
  3. CSeed
  4. DRoot
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Correct answer: (A) Stem

Q103RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Which of the following statements is true about the physical properties of compounds in a homologous series?
  1. AThey have identical melting and boiling points.
  2. BTheir boiling points decrease as the number of carbon atoms increase.
  3. CThey have a regular change in melting and boiling points.
  4. DTheir physical properties do not change.
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Correct answer: (C) They have a regular change in melting and boiling points.

Q104RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
What is formed when sodium sulfate reacts with barium chloride in a double displacement reaction?
  1. ASodium sulfate and barium chloride
  2. BSodium chloride and barium hydroxide
  3. CSodium chloride and barium sulfate
  4. DSodium hydroxide and barium chloride
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Correct answer: (C) Sodium chloride and barium sulfate

Q105RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
A piece of zinc is placed in three different solutions: lead nitrate, aluminium sulphate and silver nitrate. Which solution(s) will zinc be able to displace the metal from its solution?
  1. ALead nitrate and silver nitrate
  2. BOnly silver nitrate
  3. CAluminium sulphate and silver nitrate
  4. DLead nitrate and aluminium sulphate
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Correct answer: (A) Lead nitrate and silver nitrate

Q106RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
If an image is formed by a spherical mirror with a magnification of +1, which of the following statements is true?
  1. AThe image is real and equal in size to the object.
  2. BThe image is virtual and half the size of the object.
  3. CThe image is virtual and equal in size to the object.
  4. DThe image is real and twice the size of the object.
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Correct answer: (C) The image is virtual and equal in size to the object.

Q107RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
The first fundamental factor for evolution is:
  1. Agenetic variation
  2. Bhealthy offsprings
  3. Ccell division for growth
  4. Dcompetition among individuals
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Correct answer: (A) genetic variation

Q108RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
In the reaction: Zn + CuSO₄ → ZnSO₄ + Cu, what happens to zinc?
  1. AZinc is reduced.
  2. BZinc loses electrons.
  3. CZinc is oxidised.
  4. DZinc does not change.
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Correct answer: (C) Zinc is oxidised.

Explanation

Official answer key: (3) Zinc is oxidised. Option 2 (Zinc loses electrons) is also correct, because losing electrons is what oxidation means. Zn → Zn²⁺ + 2e⁻, so zinc is oxidised. Scoring follows the official key.

Q109RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
What are the two versions of a gene controlling a trait called?
  1. AProteins
  2. BChromosomes
  3. CMutations
  4. DAlleles
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Correct answer: (D) Alleles

Q110RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Which of these is NOT a property of magnetic field lines?
  1. AThey travel from south to north inside the magnet.
  2. BThey never intersect.
  3. CThey are continuous closed loops.
  4. DThey repel each other.
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Correct answer: (D) They repel each other.

Q111RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
What is the role of the ovary in the process of fertilisation in plants?
  1. ATo produce the egg cell
  2. BTo produce pollen
  3. CTo store the male gametes
  4. DTo provide nutrients to the pollen grains
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Correct answer: (A) To produce the egg cell

Q112RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Suppose a gardener wants to plant pea which should be of the dwarf varieties. What do you suggest for the choice of the parent plant seeds by the gardener?
  1. AAll seeds should be of tall varieties.
  2. BAll seeds should be of mixed varieties.
  3. CAny kind of seed can be used.
  4. DAll seeds should be of dwarf varieties.
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Correct answer: (D) All seeds should be of dwarf varieties.

Q113RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following is true regarding the bud development process in Hydra?
  1. ACell divisions at one site
  2. BFormation of spore
  3. CSplitting of cytoplasm
  4. DSplitting of nucleus
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Correct answer: (A) Cell divisions at one site

Q114RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
When an atom of sodium reacts with an atom of chlorine to form sodium chloride, each sodium atom:
  1. Agains one electron
  2. Bgains one proton
  3. Closes one electron
  4. Dloses one proton
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Correct answer: (C) loses one electron

Q115RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following chemical equations is balanced?
  1. A2H₂ + O₂ → 2H₂O
  2. BH₂ + 2O₂ → 2H₂O
  3. CH₂ + O₂ → H₂O
  4. DH₂O + O₂ → H₂O₂
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Correct answer: (A) 2H₂ + O₂ → 2H₂O

Q116RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
When light exits a prism, what is the result of its interaction with the prism surfaces?
  1. ALight is refracted.
  2. BLight passes through without any change.
  3. CLight is only reflected.
  4. DLight is only absorbed.
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Correct answer: (A) Light is refracted.

Q117RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
In the reaction MnO₂ + 4HCl → MnCl₂ + 2H₂O + Cl₂, what is being reduced?
  1. AHydrogen (H)
  2. BChlorine (Cl)
  3. COxygen (O)
  4. DManganese (Mn)
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Correct answer: (D) Manganese (Mn)

Q118RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following best describes a combination reaction?
  1. AA compound breaks down into simpler substances
  2. BA reaction where a product releases gas
  3. CTwo elements combine to form a compound
  4. DIons exchange between two compounds
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Correct answer: (C) Two elements combine to form a compound

Q119RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Resistance is the property of a material that _______.
  1. Aallows the flow of current
  2. Bopposes the flow of current
  3. Cgenerates electricity
  4. Dconverts electrical energy to mechanical energy
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Correct answer: (B) opposes the flow of current

Q120RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Why does a compass needle get deflected when brought near a bar magnet?
  1. AThe compass needle is non-magnetic.
  2. BThe compass needle has electric charge.
  3. CThe compass needle is a small bar magnet.
  4. DThe compass needle is made of iron.
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Correct answer: (C) The compass needle is a small bar magnet.

Q121RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Covalent molecules have low melting and boiling point because:
  1. Athey are generally gaseous in nature
  2. Bthey have weak intermolecular forces
  3. Cthey have strong bonds within the molecule
  4. Dthey have strong electrostatic intermolecular forces
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Correct answer: (B) they have weak intermolecular forces

Q122RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which factor does NOT affect the electric power consumed by an electric device?
  1. AFrequency of the device
  2. BResistance of the device
  3. CVoltage applied to the device
  4. DCurrent passing through the device
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Correct answer: (A) Frequency of the device

Q123RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
In the case of a thin lens, how are the centres of curvature typically positioned relative to the optical centre?
  1. AThey are equidistant from the optical centre.
  2. BThey are located on the lens surface itself.
  3. CThey are closer to the edge than to the optical centre.
  4. DThey coincide with the optical centre.
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Correct answer: (A) They are equidistant from the optical centre.

Q124RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following factors directly affects the resistance of a conductor?
  1. ALength of the conductor
  2. BPower of the conductor
  3. CVoltage across the conductor
  4. DCurrent through the conductor
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Correct answer: (A) Length of the conductor

Q125RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Double displacement reactions usually occur in:
  1. Aaqueous solution
  2. Bgaseous state
  3. Call three states
  4. Dsolid state
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Correct answer: (A) aqueous solution

Q126RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
What is the final product of sexual reproduction in plants?
  1. ALeaves
  2. BSeeds
  3. CFlowers
  4. DFruits
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Correct answer: (B) Seeds

Q127RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
In which case will a lens produce a magnification of exactly 1?
  1. AWhen the object is at infinity
  2. BWhen the object is placed at twice the focal length
  3. CWhen the object is placed between centre of curvature and focal point
  4. DWhen the object is placed at the focal point
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Correct answer: (B) When the object is placed at twice the focal length

Q128RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following statements is true about the pH of a neutral solution at 25°C?
  1. AThe pH is greater than 7.
  2. BThe pH is not equal to 7.
  3. CThe pH is less than 7.
  4. DThe pH is equal to 7.
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Correct answer: (D) The pH is equal to 7.

Q129RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
Which of the following is called a motile germ cell?
  1. AMale gamete
  2. BFemale gamete
  3. CEmbryo
  4. DZygote
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Correct answer: (A) Male gamete

Q130RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
In which of the following scenarios does the focal length of a concave mirror vary?
  1. AWhen placed in a vacuum
  2. BWhen placed in air
  3. CFocal length does not vary in any media
  4. DWhen placed in water
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Correct answer: (C) Focal length does not vary in any media

Q131RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
After fertilisation, the zygote divides multiple times to form which structure within the ovule?
  1. ASeed
  2. BFruit
  3. CStyle
  4. DEmbryo
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Correct answer: (D) Embryo

Q132RRB JE CBT-1, 16 Dec 2024, Shift 3 (4:30 PM)
What is the role of the stigma in the process of fertilisation?
  1. AServing as the site where pollen lands
  2. BFusing with the egg cell
  3. CProducing pollen
  4. DDeveloping into a seed
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Correct answer: (A) Serving as the site where pollen lands

Q133RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
A conductor has a current of 150 mA flowing through it with a resistance of 0.8 Ω. Find the potential difference across the conductor.
  1. A5.3 V
  2. B120 V
  3. C18.75 V
  4. D0.12 V
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Correct answer: (D) 0.12 V

Q134RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
The potential difference, V, across the ends of a given metallic wire in an electric circuit is directly proportional to the current flowing through it, provided its temperature remains the same. This is known as:
  1. AOhm's law
  2. BResistance law
  3. CNewton's law
  4. DAmpere's law
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Correct answer: (A) Ohm's law

Q135RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
An electric motor converts electrical energy into:
  1. Aelectron energy
  2. Bmagnetic energy
  3. Cnuclear energy
  4. Dmechanical energy
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Correct answer: (D) mechanical energy

Q136RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Garden is an ecosystem because:
  1. Athe living organisms in it interact with each other and are affected by abiotic components
  2. Bthe living organisms in it interact with each other and are not affected by abiotic components
  3. Cit has both plants, trees and animals like insects, frogs, birds, etc., as biotic components
  4. Dit has only biotic components like plants, trees and flowers
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Correct answer: (A) the living organisms in it interact with each other and are affected by abiotic components

Q137RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
What is the pH value of pure water at 25°C?
  1. A3
  2. B7
  3. C5
  4. D1
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Correct answer: (B) 7

Q138RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
If a conductor follows the Ohm’s law, then the graph between current and voltage will be a/an _______.
  1. Ahyperbola
  2. Bparabola
  3. Cstraight line
  4. Dellipse
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Correct answer: (C) straight line

Q139RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Which ion reduces at the cathode during electrolysis of fresh brine solution?
  1. ACl⁻
  2. BH⁺
  3. COH⁻
  4. DNa⁺
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Correct answer: (B) H⁺

Q140RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
If a resistor of 15 Ω carries a current of 2.5 A for 12 seconds, the heat produced is _____ joules.
  1. A450
  2. B1800
  3. C1125
  4. D900
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Correct answer: (C) 1125

Q141RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
The Fleming’s right hand rule is used to find the:
  1. Adirection of the magnetic field associated with a current carrying conductor
  2. Bdirection of the current of a current carrying conductor
  3. Cdirection of the motion of the current carrying conductor
  4. Ddirection of the gravitational field
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Correct answer: (B) direction of the current of a current carrying conductor

Q142RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Why is the depletion of the ozone layer a concern for humans?
  1. AIt leads to increased water pollution.
  2. BIt protects us from harmful radiation.
  3. CIt increases soil fertility.
  4. DIt promotes plant growth.
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Correct answer: (B) It protects us from harmful radiation.

Q143RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Ravi has purchased an aquarium and was surprised to know that regular cleaning of aquariums is essential. Why does it have to be regularly cleaned?
  1. ADead fish and plants may spoil the electric supply of the aquarium.
  2. BDead fish and plants are decomposed by microorganisms and smell bad.
  3. CDead fish and plants should be disposed of in the soil, not in water.
  4. DDead fish and plants may spoil the aeration system of the aquarium.
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Correct answer: (C) Dead fish and plants should be disposed of in the soil, not in water.

Q144RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Which of the following best describes why ionic compounds like potassium bromide (KBr) do NOT conduct electricity in solid form but do in molten form?
  1. ASolid KBr has weak ions that do not conduct electricity.
  2. BIn molten form, KBr decomposes into gaseous atoms.
  3. CIonic bonds prevent ion movement in solid KBr.
  4. DSolid KBr consists of neutral atoms with no free electrons.
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Correct answer: (C) Ionic bonds prevent ion movement in solid KBr.

Q145RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
Combination reaction can be represented as:
  1. AABC → AB + C
  2. BAB + CD → AD + CD
  3. CAB + C → CB + A
  4. DAB + C → ABC
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Correct answer: (D) AB + C → ABC

Q146RRB JE CBT-1, 16 Dec 2024, Shift 2 (12:45 PM)
What do the magnetic field lines around a bar magnet represent?
  1. AThe movement of electrons around the magnet
  2. BThe flow of air around the magnet
  3. CThe direction and strength of the magnetic field
  4. DThe gravitational field
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Correct answer: (C) The direction and strength of the magnetic field

Q147RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
The magnetic field inside a long, straight solenoid carrying current is ____________.
  1. Auniform and parallel to the axis of the solenoid
  2. Binversely proportional to the current
  3. Czero
  4. Dstronger near the edges
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Correct answer: (A) uniform and parallel to the axis of the solenoid

Q148RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
Which of the following is NOT an agent of dispersal of seeds?
  1. AAnimal
  2. BSunlight
  3. CWind
  4. DWater
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Correct answer: (B) Sunlight

Q149RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
On oxidation, silver changes its colour to _______ and copper changes its colour to _______.
  1. Agrey; green
  2. Bblack; green
  3. Cblack; blue
  4. Dgrey; blue
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Correct answer: (B) black; green

Q150RRB JE CBT-1, 16 Dec 2024, Shift 1 (9:00 AM)
An electric pole casts a shadow of length 42 m at a time when a tree 12 m high casts a shadow of length 16 m. Find the height of the pole.
  1. A31.5 m
  2. B30.5 m
  3. C29 m
  4. D33 m
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Correct answer: (A) 31.5 m

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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