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General Science Previous Year Questions (PYQ) with Answers – Page 7

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General Science questions asked in previous year papers of SSC, Banking, Railway and other exams, with the exam and year, answers and explanations.

1911 previous-year questions

All General Science questionsGeneral Science NotesPYQs by exam
Q122.General ScienceAsked in: NDA · NDA-I 2026, GATHard

For an ideal gas, a process is described by P = kT, where k is a constant. If the molar heat capacity for this process is C, then which one of the following is correct (where the symbols have their usual meanings)?

  1. A.C = Cp
  2. B.C = Cv
  3. C.C = (Cp + Cv)/2
  4. D.C is never constant
Show answer
Correct answer: B. C = Cv

If pressure is proportional to temperature for a fixed amount of ideal gas, the volume must stay constant, so the process is isochoric.

Q123.General ScienceAsked in: NDA · NDA-II 2026, GATHard

Consider the following statements:

I. The weight of an object is the same everywhere on the surface of the Earth, but its inertial mass could be different.

II. The inertial mass and gravitational mass of an object are proportional and the proportionality constant is the same everywhere.

III. The inertial mass and weight of an object are the same at different places on Earth.

Which of the statements given above is/are correct?

  1. A.I only
  2. B.II only
  3. C.I and II
  4. D.II and III
Show answer
Correct answer: B. II only

Mass is the same everywhere, but weight changes with g, so only statement II holds. Inertial mass measures how much a body resists a change in motion (F = ma); gravitational mass measures how strongly gravity pulls it.

Q124.General ScienceAsked in: NDA · NDA-II 2026, GATMedium

A tennis ball of mass 350 g is thrown vertically upwards at a speed of 4 m/s. If M is the maximum gravitational potential energy of the ball and H is the maximum height it reaches, then which one of the following is correct? (Take g = 10 m/s²)

  1. A.M = 5·6 J, H = 1·6 m
  2. B.M = 2·8 J, H = 1·6 m
  3. C.M = 5·6 J, H = 0·8 m
  4. D.M = 2·8 J, H = 0·8 m
Show answer
Correct answer: D. M = 2·8 J, H = 0·8 m

At the top of its flight all the kinetic energy of the ball has turned into gravitational potential energy. The mass is 350 g, that is 0·35 kg.

Q125.General ScienceAsked in: CDS · CDS-I 2026, GKHard

Which one of the following is not a function of the pigment carotenoid ?

  1. A.Responsible for yellow-orange hues of autumnal leaves
  2. B.Protecting chlorophyll from photo-oxidation
  3. C.Photoprotective role in our eyes
  4. D.Reaction centre in the pigment system
Show answer
Correct answer: D. Reaction centre in the pigment system

The reaction centre of a photosystem is a special chlorophyll a molecule, not a carotenoid. In photosynthesis, pigments are grouped into photosystems.

Q126.General ScienceAsked in: CDS · CDS-I 2026, GKMedium

A researcher is studying different types of cells. In which cell type will he/she encounter the highest number of lysosomes ?

  1. A.Pancreatic cell
  2. B.Ovarian cell
  3. C.Muscle cell in the thigh of a runner
  4. D.White blood cell
Show answer
Correct answer: D. White blood cell

Many white blood cells destroy germs by swallowing them, and that digestion needs a large number of lysosomes. Lysosomes are small membrane-bound sacs packed with hydrolytic enzymes that break down proteins, fats, carbohydrates and nucleic acids.

Q127.General ScienceAsked in: NDA · NDA-I 2026, GATMedium

Two forces of equal magnitude simultaneously act at a point. It is observed that the resultant force is equal in magnitude to the individual forces. Which of the following statements is/are correct? I. The angle between one of the individual forces and the resultant force is π/3. II. The angle between the individual forces is 2π/3. Select the answer using the code given below.

  1. A.I only
  2. B.II only
  3. C.Both I and II
  4. D.Neither I nor II
Show answer
Correct answer: C. Both I and II

Two equal forces give a resultant of the same size only when they are 120° apart, and the resultant then makes 60° with each.

Q128.General ScienceAsked in: NDA · NDA-II 2026, GATEasy

The bob of a simple pendulum is displaced from its mean position and then released from rest 0.20 m above its mean position. What is the speed of the bob as it passes through the mean position? (Take g = 10 m/s²)

  1. A.0 m/s
  2. B.1 m/s
  3. C.2 m/s
  4. D.√10 m/s
Show answer
Correct answer: C. 2 m/s

All the potential energy at the top turns into kinetic energy at the mean position, so v = √(2gh) = √(2 × 10 × 0.20) = 2 m/s. When the bob is released from rest at height h, it has potential energy mgh and no kinetic energy.

Q129.General ScienceAsked in: NDA · NDA-I 2026, GATHard

A pendulum of length L oscillates with an angular amplitude of θ = 60° and time period T. Let T₀ = 2π√(L/g) be the time period for small angle of oscillations, where g is the acceleration due to gravity. If air resistance is negligibly small and the string remains straight, then which one of the following is correct?

  1. A.T will be slightly greater than T₀.
  2. B.T will be slightly smaller than T₀.
  3. C.T will be exactly equal to T₀.
  4. D.T will depend upon the mass of the bob.
Show answer
Correct answer: A. T will be slightly greater than T₀.

The formula T₀ = 2π√(L/g) holds only for small swings; at large amplitudes the period grows.

Q130.General ScienceAsked in: NDA · NDA-II 2026, GATMedium

A bicycle racing track is a level circular road of radius 10 m. Three cyclists P, Q and R with identical cycles are cycling on the track with speeds 2 m/s, 3 m/s and 5 m/s respectively. If the coefficient of friction between the tyres and the road is 0.1, then which cyclist will slip? (Take g = 10 m/s²)

  1. A.P only
  2. B.Q only
  3. C.R only
  4. D.All will slip
Show answer
Correct answer: C. R only

On a level curve, friction alone supplies the centripetal force, so a cyclist slips when the needed force exceeds the maximum friction.

Q133.General ScienceAsked in: RRB NTPC · 18 Mar, 2026, Shift 2Easy

Mayonnaise is prepared by the process of:

  1. A.Caramelisation
  2. B.Emulsification
  3. C.Maillard reaction
  4. D.Oxidation
Show answer
Correct answer: B. Emulsification

Mayonnaise is an emulsion: very small droplets of oil are beaten into a watery liquid of egg yolk with vinegar or lemon juice, and the droplets stay spread out instead of separating into a layer.

Q135.General ScienceAsked in: RRB Group D · 04 Feb 2026, Shift 1Easy

Which of the following is a characteristic property of ionic compounds?

  1. A.Strong electrostatic forces between ions
  2. B.Low melting point
  3. C.Insoluble in water
  4. D.Poor electrical conductivity in molten state
Show answer
Correct answer: A. Strong electrostatic forces between ions

An ionic compound is a lattice of positive and negative ions held by strong electrostatic attraction, and that force explains all its other properties.

Q136.General ScienceAsked in: RRB Group D · 02 Feb 2026, Shift 3Easy

Which of the following is NOT a property of ionic compounds?

  1. A.They generally have high melting and boiling points.
  2. B.They are generally solid at room temperature.
  3. C.They can conduct electricity in an aqueous/molten state.
  4. D.They are soluble in solvents such as kerosene and petrol.
Show answer
Correct answer: D. They are soluble in solvents such as kerosene and petrol.

Ionic compounds dissolve well in water but not in kerosene, petrol or other non-polar organic solvents, so this statement is not a property of theirs.

Q138.General ScienceAsked in: NDA · NDA-I 2025, GATEasy

We hear an echo due to

  1. A.Refraction of sound waves
  2. B.Reflection of sound waves
  3. C.Diffraction of sound waves
  4. D.Resonance due to sound waves
Show answer
Correct answer: B. Reflection of sound waves

An echo is sound that bounces back from a hard surface such as a wall, cliff or hill and reaches our ears again.

Q139.General ScienceAsked in: NDA · NDA-I 2025, GATEasy

Which one of the following statements is NOT correct ?

  1. A.An ammeter is always connected in series in the circuit to measure the current
  2. B.A Voltmeter is always connected in parallel in a circuit to measure the voltage
  3. C.A voltmeter has a high resistance and an ammeter has a low resistance
  4. D.A voltmeter has a low resistance and an ammeter has a high resistance
Show answer
Correct answer: D. A voltmeter has a low resistance and an ammeter has a high resistance

This reverses the truth: a voltmeter has a very high resistance and an ammeter a very low one. An ammeter measures the current flowing through a circuit, so it is placed in series and the whole current passes through it.