UTpaper

Free mock tests & test series

RRB JE · Topic-wise previous year questions

General Science Previous Year Questions (page 2)

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
Q51RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
If three resistors of 6 Ω, 3 Ω and 2 Ω are connected in parallel, the total equivalent resistance is ________.
  1. A11 Ω
  2. B0.5 Ω
  3. C2 Ω
  4. D1 Ω
Show answerHide answer

Correct answer: (D) 1 Ω

Q52RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
According to experimental results, when does the magnitude of the force on a current-carrying conductor in a magnetic field become the highest?
  1. AWhen the current is perpendicular to the magnetic field
  2. BWhen the current is opposite to the magnetic field
  3. CWhen the current is parallel to the magnetic field
  4. DWhen the current flows at any angle to the magnetic field
Show answerHide answer

Correct answer: (A) When the current is perpendicular to the magnetic field

Q53RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Which of the following will cause the greatest increase in power dissipation for a given resistor?
  1. ADoubling the voltage across the resistor
  2. BDoubling the resistance
  3. CHalving the current through the resistor
  4. DHalving the resistance
Show answerHide answer

Correct answer: (A) Doubling the voltage across the resistor

Q54RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
A solution has a pH of 12. Which ion concentration is higher in this solution?
  1. ABoth H⁺and OH⁻ are equal
  2. BMore number S²⁻ ions and more Cl⁻¹
  3. COnly OH⁻
  4. DOnly H⁺
Show answerHide answer

Correct answer: (C) Only OH⁻

Q55RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Fleming's Right-Hand Rule is applicable in the case of _________.
  1. Aelectric motors
  2. Belectric generators
  3. Celectric kettles
  4. Dfuse wires
Show answerHide answer

Correct answer: (B) electric generators

Q56RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Why is monitoring pH crucial for understanding the impacts of acid rain on soil and water ecosystems?
  1. AAcid rain only makes the water taste sour.
  2. BAcid rain does not affect soil and water ecosystems.
  3. CAcid rain decreases the pH, harming aquatic life and soil nutrient availability.
  4. DAcid rain increases the pH of soil and water bodies.
Show answerHide answer

Correct answer: (C) Acid rain decreases the pH, harming aquatic life and soil nutrient availability.

Q57RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
Which ion is responsible for the acidic properties of acids?
  1. ANa⁺
  2. BH⁺
  3. COH⁻
  4. DCl⁻
Show answerHide answer

Correct answer: (B) H⁺

Q58RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
When two elements react to form a compound, it can be classified as:
  1. Adisplacement
  2. Bdouble displacement
  3. Cdecomposition
  4. Dcombination
Show answerHide answer

Correct answer: (D) combination

Q59RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
In a certain code language, ‘fan light door’ is coded as ‘dy ph mt’, ‘door window mat’ is coded as ‘lp ph st’, ‘mat fan glass’ is coded as ‘st bq dy’. What is the code for 'fan' in that language? (Note: All the codes are two-letter coded only.)
  1. Amt
  2. Bbq
  3. Cph
  4. Ddy
Show answerHide answer

Correct answer: (D) dy

Q60RRB JE CBT-1, 18 Dec 2024, Shift 1 (9:00 AM)
What role do green plants and certain bacteria play in an ecosystem?
  1. AProducers
  2. BConsumers
  3. CParasites
  4. DDecomposers
Show answerHide answer

Correct answer: (A) Producers

Q61RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
A tube like structure grows down from the pollen grain to the style and reaches the ovule. This pollen tube is responsible for:
  1. Acarrying oxygen to the female germ cell in the ovary
  2. Bcarrying nutrition to the female germ cell in the ovary
  3. Ccarrying the male germ cell to the female germ cell in the ovary
  4. Dcarrying carbon dioxide to the female germ cell in the ovary
Show answerHide answer

Correct answer: (C) carrying the male germ cell to the female germ cell in the ovary

Q62RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
When an aqueous solution of potassium iodide reacts with lead nitrate, what type of product is formed?
  1. ASodium nitrate
  2. BLead nitrate
  3. CLead chloride
  4. DLead iodide (precipitate)
Show answerHide answer

Correct answer: (D) Lead iodide (precipitate)

Q63RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Oxidation of metals in the presence of acids or moisture is called:
  1. Acorrosion
  2. Bneutralisation
  3. Crancidity
  4. Drusting
Show answerHide answer

Correct answer: (A) corrosion

Q64RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
The measure of how much a material resists the flow of charges is known as:
  1. Aresistivity
  2. Bpotential difference
  3. Ccurrent
  4. Dpower generated
Show answerHide answer

Correct answer: (A) resistivity

Q65RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
What happens when zinc (Zn) reacts with hydrochloric acid (HCl)?
  1. ABoth Zinc and Hydrogen are oxidised.
  2. BZinc is reduced.
  3. CZinc is oxidised.
  4. DHydrogen is oxidised.
Show answerHide answer

Correct answer: (C) Zinc is oxidised.

Q66RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following factors is primarily responsible for survival of species?
  1. ATemperature
  2. BNiche
  3. CVariations
  4. DMutation
Show answerHide answer

Correct answer: (C) Variations

Q67RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following materials will have the least resistance at room temperature?
  1. AIron
  2. BAluminum
  3. CNichrome
  4. DCopper
Show answerHide answer

Correct answer: (D) Copper

Q68RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Rose flower pollen has reached Sunflower stigma through pollination. The pollen will be rejected by the stigma because:
  1. Apollen has nothing to do with stigma
  2. Bstigma has nothing to do with pollen
  3. Cpollen was not of sunflower
  4. Dpollen was of rose flower
Show answerHide answer

Correct answer: (C) pollen was not of sunflower

Q69RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
The solution of the system of the given linear equations is: 2x + 3y − z = 5, x − 2y + 4z = −2, 3x + y + 2z = 7
  1. Ax = −44/7, y = 27/7, z = −4
  2. Bx = −44/7, y = −27/7, z = 4
  3. Cx = 44/7, y = −27/7, z = −4
  4. Dx = 44/7, y = −27/7, z = −8
Show answerHide answer

Correct answer: (C) x = 44/7, y = −27/7, z = −4

Q70RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following is an example of a decomposition reaction that occurs due to the application of electric current?
  1. AHeating calcium carbonate
  2. BDecomposition of potassium permanganate by heat
  3. CDecomposition of sodium bicarbonate by heat
  4. DElectrolysis of water
Show answerHide answer

Correct answer: (D) Electrolysis of water

Q71RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which of the following options is INCORRECT with relation to the given statement? The magnetic field lines of a bar magnet may be drawn using:
  1. Airon filings
  2. Ba magnetic compass
  3. Cwood particles
  4. Danother bar magnet
Show answerHide answer

Correct answer: (C) wood particles

Q72RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
What is the unit of electric power commonly used to measure household energy consumption?
  1. AKilowatt-hours
  2. BAmperes
  3. CJoules
  4. DWatts
Show answerHide answer

Correct answer: (A) Kilowatt-hours

Q73RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
If the resistance of a conductor is doubled while the current remains the same, how will the heat produced per unit time change?
  1. AIt will be halved.
  2. BIt will remain the same.
  3. CIt will quadruple.
  4. DIt will double.
Show answerHide answer

Correct answer: (D) It will double.

Q74RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Where does the image form when an object is positioned at the centre of curvature of a concave mirror?
  1. AAt the centre of curvature
  2. BAt the pole
  3. CAt infinity
  4. DAt the focal point
Show answerHide answer

Correct answer: (A) At the centre of curvature

Q75RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
What is the role of chlorine gas in the preparation of bleaching powder?
  1. AIt reacts with dry slaked lime to form bleaching powder.
  2. BIt reacts with water to produce hydrogen peroxide.
  3. CIt is used as a catalyst for the reaction.
  4. DIt is used to neutralise calcium hydroxide.
Show answerHide answer

Correct answer: (A) It reacts with dry slaked lime to form bleaching powder.

Q76RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
The pH of acid rain is:
  1. Amore than 7
  2. Bmore than 5.6 but less than 7
  3. Cless than 5.6
  4. Dequal to 7
Show answerHide answer

Correct answer: (C) less than 5.6

Q77RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
As the concentration of hydronium ions increases, the pH value _______.
  1. Aincreases
  2. Bdecreases
  3. Cdecreases and then increases
  4. Dremains the same
Show answerHide answer

Correct answer: (B) decreases

Q78RRB JE CBT-1, 17 Dec 2024, Shift 3 (4:30 PM)
Which part of the Bryophyllum plant develops new plants via vegetative propagation?
  1. ARoots
  2. BLeaves
  3. CFlowers
  4. DStems
Show answerHide answer

Correct answer: (B) Leaves

Q79RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which of the following is true about asexual reproduction?
  1. AIt results in offspring genetically identical to the parent.
  2. BIt requires complex reproductive organs.
  3. CIt requires fertilisation.
  4. DIt involves two parent organisms.
Show answerHide answer

Correct answer: (A) It results in offspring genetically identical to the parent.

Q80RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
What are the number of chromosomes in a human male germ cell?
  1. A46 pairs of Chromosomes
  2. B23 pairs of Chromosomes
  3. C23 Chromosomes
  4. D46 Chromosomes
Show answerHide answer

Correct answer: (C) 23 Chromosomes

Q81RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which of the following statements about AIDS is FALSE?
  1. AAIDS is caused by the HIV virus.
  2. BAIDS can be transmitted through mosquito bites.
  3. CAIDS can be prevented by practising safe sex.
  4. DAIDS affects the immune system of the body.
Show answerHide answer

Correct answer: (B) AIDS can be transmitted through mosquito bites.

Q82RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which of the following statements best describes what happens in a double displacement reaction?
  1. AElectrons are transferred between atoms.
  2. BIons in two compounds switch places to form two new compounds.
  3. CTwo elements combine to form a compound.
  4. DA compound breaks down into simpler substances.
Show answerHide answer

Correct answer: (B) Ions in two compounds switch places to form two new compounds.

Q83RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
The special reproductive structures in fungi like Rhizopus, which germinate to form new individuals, are called:
  1. ASpores
  2. BAnthers
  3. CGemmules
  4. DPollens
Show answerHide answer

Correct answer: (A) Spores

Q84RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
When the pH of rainwater falls below 5.6, it is commonly referred to as:
  1. Aacid rain
  2. Balkaline rain
  3. Chard water
  4. Dmineral rain
Show answerHide answer

Correct answer: (A) acid rain

Q85RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
The magnetic field lines of a bar magnet may NOT be drawn using:
  1. Aanother bar magnet
  2. Ba magnetic compass
  3. Ciron filings
  4. Dwood particles
Show answerHide answer

Correct answer: (D) wood particles

Q86RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which of the following statements is correct regarding magnets?
  1. AA magnet can have either north or south pole.
  2. BA magnet is a dipole with north and south poles.
  3. CA magnet produces magnetic as well as electric fields.
  4. DA magnet can attract an electron.
Show answerHide answer

Correct answer: (B) A magnet is a dipole with north and south poles.

Q87RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
What is the result when sodium chloride and silver nitrate are mixed in a double displacement reaction?
  1. AFormation of a salt
  2. BFormation of water
  3. CFormation of a precipitate
  4. DFormation of a gas
Show answerHide answer

Correct answer: (C) Formation of a precipitate

Q88RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Which electrical appliance helps preserve food by maintaining low temperatures?
  1. AMicrowave
  2. BElectric kettle
  3. CRefrigerator
  4. DToaster
Show answerHide answer

Correct answer: (C) Refrigerator

Q89RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
The solution of the system of linear equations is: x + y + z = 6, 2x − y + 3z = 14, −x + 2y −z = −2
  1. Ax = −4/3, y = 4/3, z = 6
  2. Bx = 4/3, y = −4/3, z = 5
  3. Cx = 5/3, y = −5/3, z = 6
  4. Dx = −5/3, y = 5/3, z = −6
Show answerHide answer

Correct answer: (A) x = −4/3, y = 4/3, z = 6

Q90RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
For a concave mirror, where is the centre of curvature located relative to the mirror?
  1. AIn front of the mirror
  2. BBehind the mirror
  3. CAt the mirror's focal point
  4. DAt the mirror’s surface
Show answerHide answer

Correct answer: (A) In front of the mirror

Q91RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
What is the molecular formula of washing soda?
  1. ANaHCO₃
  2. BNa₂CO₃·10H₂O
  3. CNaCl
  4. DNa₂CO₃
Show answerHide answer

Correct answer: (B) Na₂CO₃·10H₂O

Q92RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
If the object is placed beyond the center of curvature (C) in front of a concave mirror, the image formed will be ___________.
  1. Avirtual, upright and diminished
  2. Breal, inverted and diminished
  3. Creal, inverted and enlarged
  4. Dvirtual, upright and enlarged
Show answerHide answer

Correct answer: (B) real, inverted and diminished

Q93RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
What is the pH of a solution containing significant concentrations of H⁺ ions?
  1. A7
  2. BGreater than 7
  3. CLess than 7
  4. DCannot be determined
Show answerHide answer

Correct answer: (C) Less than 7

Q94RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
A double displacement reaction typically involves the exchange of:
  1. Aneutrons
  2. Bprotons
  3. Celectrons
  4. Dions
Show answerHide answer

Correct answer: (D) ions

Q95RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
If the resistance in a circuit is increased while the voltage remains constant, the current will __________.
  1. Adecrease
  2. Bincrease
  3. Cdouble
  4. Dremain constant
Show answerHide answer

Correct answer: (A) decrease

Q96RRB JE CBT-1, 17 Dec 2024, Shift 2 (12:45 PM)
Mendel studied traits such as flower colour and seed shape in pea plants. These traits are called as:
  1. Avisible characters
  2. Bprogeny units
  3. Cdominant characteristics
  4. Dgenetic codes
Show answerHide answer

Correct answer: (A) visible characters

Q97RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
An electric fan is connected to a 220 V generator. The current is 0.50 A. What is the power used by the fan?
  1. A110 Watt
  2. B11 Watt
  3. C440 Watt
  4. D220 Watt
Show answerHide answer

Correct answer: (A) 110 Watt

Q98RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Samples of four metals A, B, C and D were taken and added to a solution individually. The results obtained have been listed as follows. A can displace B from its solution B can displace D from its solution C can displace D from its solution C can displace A from its solution Which is the most reactive metal?
  1. AC
  2. BB
  3. CD
  4. DA
Show answerHide answer

Correct answer: (A) C

Q99RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
The pattern of the magnetic field lines of a solenoid is similar to that of a:
  1. Aring magnet
  2. Bbar magnet
  3. Chorseshoe magnet
  4. Dbutton magnet
Show answerHide answer

Correct answer: (B) bar magnet

Q100RRB JE CBT-1, 17 Dec 2024, Shift 1 (9:00 AM)
Equipment such as geysers and air conditioners, compared to light bulbs and fans, require:
  1. Aless power
  2. Bless voltage
  3. Chigher voltage
  4. Dhigher power
Show answerHide answer

Correct answer: (D) higher power

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