UTpaper

Free mock tests & test series

RRB JE · Topic-wise previous year questions

General Science Previous Year Questions (page 6)

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.

  • 286 questions
  • 11 topics
  • Official answer key
  • Free
Attempt RRB JE papers →

Practise by topic

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
Q251RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)
The nucleus contains chromosomes, which appear as rod-shaped structures only when the cell is about to divide. These chromosomes are composed of _____.
  1. ARNA and lipids
  2. BAmino acids and carbohydrates
  3. CDNA and proteins
  4. DGlucose and enzymes
Show answerHide answer

Correct answer: (C) DNA and proteins

Q252RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)
Why are terrestrial food chains usually limited to 4–5 trophic levels?
  1. APlants produce less oxygen
  2. BEnergy available decreases at higher trophic levels
  3. CDecomposers recycle all energy
  4. DTop predators eat less
Show answerHide answer

Correct answer: (B) Energy available decreases at higher trophic levels

Q253RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)
During aerobic respiration, each pyruvate molecule is broken down to give ______ molecules of carbon dioxide.
  1. ATwo
  2. BThree
  3. CFour
  4. DOne
Show answerHide answer

Correct answer: (B) Three

Q254RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)
Why do muscle cells sometimes respire anaerobically during heavy exercise?
  1. ABecause the supply of oxygen is limited
  2. BBecause lactic acid is required
  3. CBecause the body wants to store energy
  4. DBecause glucose is unavailable
Show answerHide answer

Correct answer: (A) Because the supply of oxygen is limited

Q255RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)
Why does the temperature remain constant during melting of ice even on heating?
  1. AHeat energy converts directly into work
  2. BHeat energy escapes from ice into the surroundings
  3. CHeat energy increases kinetic energy instantly
  4. DHeat energy is used to overcome particle attraction
Show answerHide answer

Correct answer: (D) Heat energy is used to overcome particle attraction

Q256RRB JE CBT-1, 19 Feb 2026, Shift 3 (4:30 PM)
Which metal releases the most heat when reacting with excess hydrochloric acid?
  1. AIron
  2. BNickel
  3. CZinc
  4. DMagnesium
Show answerHide answer

Correct answer: (D) Magnesium

Q257RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
A scientist is designing an artificial multi-cellular organism. What must they include to ensure all cells receive nutrients and remove wastes effectively?
  1. AA transportation system for food, oxygen, and waste
  2. BOnly specialised tissues for nutrition
  3. CDirect contact of every cell with the environment
  4. DSimple diffusion through the entire surface
Show answerHide answer

Correct answer: (A) A transportation system for food, oxygen, and waste

Q258RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Which observation best supports the statement that humans have double circulation of blood?
  1. ABlood passes through the heart twice in one complete circulation
  2. BBlood flows only once through the heart in one complete cycle
  3. CRight side of the heart pumps oxygenated blood
  4. DOxygenated and deoxygenated blood mix in the heart
Show answerHide answer

Correct answer: (A) Blood passes through the heart twice in one complete circulation

Q259RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Animal tissues differ from plant tissues because animal tissues:
  1. ALack specialized functions
  2. BShow unlimited growth
  3. CAre mostly living and flexible
  4. DPossess rigid cell walls
Show answerHide answer

Correct answer: (C) Are mostly living and flexible

Q260RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
When an object is placed at infinity in front of a convex mirror, what is the nature of the image formed?
  1. AReal and inverted
  2. BReal and erect
  3. CVirtual and erect
  4. DVirtual and inverted
Show answerHide answer

Correct answer: (C) Virtual and erect

Q261RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Why is it important to dry agricultural produce first in sunlight and then in shade before storage?
  1. ATo reduce moisture content and prevent growth of pests and fungi.
  2. BTo improve the color and taste of the produce.
  3. CTo increase the size and brightness of the grains.
  4. DTo make the grains easier to pack and prevent growth of weeds.
Show answerHide answer

Correct answer: (A) To reduce moisture content and prevent growth of pests and fungi.

Q262RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Which substance has a molecular mass of 44 u?
  1. ACarbon monoxide
  2. BCarbon dioxide
  3. CMethane
  4. DAmmonia
Show answerHide answer

Correct answer: (B) Carbon dioxide

Q263RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
In graphite, a carbon atom is attached with:
  1. AOne other carbon atom
  2. BFour other carbon atoms
  3. CTwo other carbon atoms
  4. DThree other carbon atoms
Show answerHide answer

Correct answer: (D) Three other carbon atoms

Q264RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
If an atom loses two electrons, which of the following changes will occur?
  1. AThe atom will become a cation with +2 charge.
  2. BThe atomic number will decrease by 2.
  3. CThe neutron number will decrease by 2.
  4. DThe atomic number will increase by 2.
Show answerHide answer

Correct answer: (A) The atom will become a cation with +2 charge.

Q265RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Which of the following was NOT a major recommendation of the Kelkar Task Force (2002) on direct taxes?
  1. AExtension of PAN to cover all economic agents/citizens
  2. BReduction in corporate tax rate to 40 percent for domestic companies
  3. CElimination of the standard deduction for salaried taxpayers
  4. DElimination of the minimum alternate tax on corporate entities
Show answerHide answer

Correct answer: (B) Reduction in corporate tax rate to 40 percent for domestic companies

Q266RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Which statement correctly describes an ion?
  1. AA molecule containing similar atoms only
  2. BA charged atom or group of atoms
  3. CA compound formed by covalent bonds
  4. DA neutral atom formed by chemical bonding
Show answerHide answer

Correct answer: (B) A charged atom or group of atoms

Q267RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
A person with both myopia and hypermetropia is most likely to use which type of lens?
  1. AConcave lens
  2. BCylindrical lens
  3. CConvex lens
  4. DBi-focal lens
Show answerHide answer

Correct answer: (D) Bi-focal lens

Q268RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
Equal pieces of zinc and copper are added separately to dilute sulphuric acid. Which observation is CORRECT?
  1. ABoth metals evolve hydrogen gas
  2. BNeither metal evolves hydrogen gas
  3. COnly zinc evolves hydrogen gas
  4. DOnly copper evolves hydrogen gas
Show answerHide answer

Correct answer: (C) Only zinc evolves hydrogen gas

Q269RRB JE CBT-1, 19 Feb 2026, Shift 2 (12:45 PM)
In May 2025, DRDO’s DMSRDE laboratory in _________ created an advanced polymeric membrane designed for high-pressure desalination of seawater.
  1. APune
  2. BHyderabad
  3. CKanpur
  4. DJaipur
Show answerHide answer

Correct answer: (C) Kanpur

Q270RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
When methane (CH4) burns completely in the presence of sufficient oxygen, which products are formed?
  1. ACarbon dioxide and carbon
  2. BCarbon and hydrogen
  3. CCarbon dioxide and water
  4. DCarbon monoxide and water
Show answerHide answer

Correct answer: (C) Carbon dioxide and water

Q271RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
How does the magnetic field strength at the center of a circular loop change if the current through the loop is doubled?
  1. AIt becomes twice as large
  2. BIt becomes four times as large
  3. CIt becomes half as large
  4. DIt remains unchanged
Show answerHide answer

Correct answer: (A) It becomes twice as large

Q272RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
When two aqueous solutions react inside a sealed flask and form products, what happens to the total mass of the system?
  1. AIt fluctuates during reaction
  2. BIt increases due to gas formation
  3. CIt decreases due to precipitation
  4. DIt remains unchanged throughout
Show answerHide answer

Correct answer: (D) It remains unchanged throughout

Q273RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
When a man pushes a wall but the wall does not move, what is the work done by the man on the wall?
  1. AZero work is done as there is no displacement of the wall.
  2. BNegative work is done as the wall resists the push.
  3. CPositive work is done as force is applied.
  4. DMaximum work is done as the man uses full effort.
Show answerHide answer

Correct answer: (A) Zero work is done as there is no displacement of the wall.

Q274RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
If a convex mirror forms a point-sized image at its focus, where is the object located?
  1. AAt infinity
  2. BBetween F and the pole
  3. CBetween P and F
  4. DAt the pole
Show answerHide answer

Correct answer: (A) At infinity

Q275RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Systolic pressure is measured when the heart __________.
  1. AStops beating
  2. BFills with blood
  3. CRelaxes
  4. DContracts
Show answerHide answer

Correct answer: (D) Contracts

Q276RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Which cell organelle is responsible for the manufacture of lipids in the cell?
  1. ARough Endoplasmic Reticulum
  2. BGolgi Apparatus
  3. CMitochondria
  4. DSmooth Endoplasmic Reticulum
Show answerHide answer

Correct answer: (D) Smooth Endoplasmic Reticulum

Q277RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Which statement correctly describes the atomic number of an element?
  1. ATotal mass of all subatomic particles
  2. BTotal number of nucleons in the atom
  3. CNumber of protons present in the nucleus
  4. DNumber of neutrons present in the nucleus
Show answerHide answer

Correct answer: (C) Number of protons present in the nucleus

Q278RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Which structural feature primarily enables upward movement of water against gravity in plants?
  1. ALarge intercellular spaces in spongy mesophyll
  2. BLignified xylem vessels forming continuous columns
  3. CActively dividing meristematic tissues
  4. DThin-walled sieve tubes with companion cells
Show answerHide answer

Correct answer: (B) Lignified xylem vessels forming continuous columns

Q279RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
When a gun is fired, it recoils backward as the bullet moves forward. How does this demonstrate Newton’s third law of motion?
  1. AThe bullet moves forward only because the gun has stored energy.
  2. BThe gun moves backward because it is heavier than the bullet.
  3. CThe gun recoils because the bullet moves faster than the gun.
  4. DThe gun pushes the bullet forward, and the bullet pushes the gun backward with an equal and opposite force.
Show answerHide answer

Correct answer: (D) The gun pushes the bullet forward, and the bullet pushes the gun backward with an equal and opposite force.

Q280RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Refer to the two statements given below and choose the CORRECT option. Statement A: Selective reabsorption in nephrons helps maintain water and salt balance in the body. Statement B: Selective reabsorption prevents nitrogenous wastes from entering the filtrate.
  1. AStatement A is incorrect but B is correct.
  2. BBoth statements A and B are correct.
  3. CBoth statements A and B are incorrect.
  4. DStatement A is correct but B is incorrect.
Show answerHide answer

Correct answer: (D) Statement A is correct but B is incorrect.

Q281RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
What is the function of the iris in the human eye?
  1. AControls the size of the pupil
  2. BRefracts incoming light rays
  3. CTransmits signals to the brain
  4. DForms the image on the retina
Show answerHide answer

Correct answer: (A) Controls the size of the pupil

Q282RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Ribosomes are attached to the surface of the rough endoplasmic reticulum. What is the primary function of the rough endoplasmic reticulum?
  1. AEnergy production and cellular respiration
  2. BDNA replication and transcription
  3. CLipid synthesis
  4. DProtein synthesis and transport
Show answerHide answer

Correct answer: (D) Protein synthesis and transport

Q283RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Atomic masses of elements are compared with a standard reference. Carbon-12 was chosen as the standard for the atomic mass unit mainly because:
  1. ACarbon is present in very large amounts in nature
  2. BCarbon shows very little chemical reactivity with elements
  3. CCarbon-12 gives atomic masses close to whole numbers
  4. DCarbon is able to form a large number of compounds
Show answerHide answer

Correct answer: (C) Carbon-12 gives atomic masses close to whole numbers

Q284RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Why is using compost or vermi-compost preferable to excessive use of fertilizers for increasing soil fertility?
  1. AIt eliminates bacterial and viral plant diseases.
  2. BIt recycles biological waste and avoids environmental harm.
  3. CIt supplies only micro-nutrients and avoids macronutrients.
  4. DIt replaces the need for irrigation and weeding.
Show answerHide answer

Correct answer: (B) It recycles biological waste and avoids environmental harm.

Q285RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
Which statement is correct regarding the definition of biodegradable substances?
  1. ASubstances that are broken by biological process
  2. BSubstances that are broken by chemical process
  3. CSubstances that are broken by mechanical process
  4. DSubstances that are broken by physical process
Show answerHide answer

Correct answer: (A) Substances that are broken by biological process

Q286RRB JE CBT-1, 19 Feb 2026, Shift 1 (9:00 AM)
If an ammeter reading increases when a thicker wire replaces a thinner one of the same material and length, what is the most likely reason?
  1. AThe wire's resistivity increased
  2. BThe voltage across the wire decreased
  3. CThe wire's length is shorter
  4. DThe resistance of the thicker wire is lower, allowing more current
Show answerHide answer

Correct answer: (D) The resistance of the thicker wire is lower, allowing more current

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.

More RRB JE subjects

Mathematics 561General Awareness 379Reasoning 316Environment & Pollution Control 18