Science PYQs

2024

Q1: Acetylsalicylic acid is known as:

  • (A) Oil of wintergreen
  • (B) Aspirin
  • (C) Ibuprofen
  • (D) Paracetamol

Q2: What is the Surya Heliophysics Foundation Model?

  • (A) A planetary rover
  • (B) An AI model to forecast solar activity
  • (C) An Earth observation satellite
  • (D) A spacecraft

Q3: Mustard Gas is:

  • (A) Uranium hexafluoride
  • (B) Dichlorodiphenyltrichloroethane
  • (C) 2,2'-dichlorodiethylsulfide
  • (D) Diethylsulphoxide

Q4: Wave like character of an electron is proved by:

  • (A) The ionization of an atom
  • (B) The flow of electrons in a metal wire
  • (C) The deflection of an electron beam by electrical plates
  • (D) The diffraction pattern of electrons scattered from a crystalline solid

Q5: Which of the following is a non-reducing sugar:

  • (A) Glucose
  • (B) Maltose
  • (C) Sucrose
  • (D) Fructose

Q6: Which of the followings is not a dye:

  • (A) Alizarin
  • (B) Fluorescein
  • (C) Phenolphthalein
  • (D) Anthranilic acid

2023

Q1: Which of the following statements are correct in respect of 'Rashtriya Vigyan Puraskar'?

(1) This Puraskar was instituted by Government of India in the year 2023
(2) This award is given in four categories
(3) Vigyan Team Puraskar is given to five teams
(4) For the year 2024, in the field of Space Science and Technology 'Vigyan Yuva Puraskar' was given to Four Scientists

A) 1 and 3
B) 2 and 4
C) 2 and 3
D) 1 and 2

Q2: The name of the Artificial Intelligence (AI) powered News Anchor developed by the 'India Today Group' is:
(A) Sana
(B) Persana
(C) Baani
(D) Anania

Q3: "an institutional arrangement to keep Science, Society and Industry on the same page" was said about:
(A) The IITs
(B) The Department of Science and Technology
(C) The TIFR
(D) The CSIR

Q4: The Kalinga Prize is given for:
(A) Achievements of a scientist
(B) Achievements of a science popularizer
(C) Achievements of a geologist
(D) Achievements of a mathematician

Q5: Which one of the following term describes not only the physical space occupied by an organism, but also its functional role in the community of organisms?
(A) Ecotone
(B) Ecological niche
(C) Habitat
(D) Home range

Q6: In the grasslands, trees do not replace the grasses as a part of an ecological succession because of:
(A) Insects and fungi
(B) Limited sunlight and paucity of nutrients
(C) Water limits and fire
(D) None of the above

Q7: With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism/organisms?

1. Virus
2. Fungi
3. Bacteria

(A) 1 only
(B) 2 and 3 only
(C) 1 and 3 only
(D) 1, 2 and 3

Q8: Which one of the following is the process involved in photosynthesis?
(A) Potential energy is released to form free energy
(B) Free energy is converted into potential energy and stored
(C) Food is oxidized to release carbon dioxide and water
(D) Oxygen is taken, and carbon dioxide and water vapour are given out

Q9: Which of the following is/are the emission/emissions from coal combustion at thermal power plants?

1. Carbon dioxide
2. Oxides of Nitrogen
3. Oxides of Sulphur

(A) 1 only
(B) 2 and 3 only
(C) 1 and 3 only
(D) 1, 2 and 3

Q10: Consider the following statements regarding an aquatic ecosystem:

(1) The shallow water zone around the edge of the lake is the littoral zone.
(2) Limnetic zone is the open zone where phytoplankton grows in abundance
(3) Profundal zone is the dark zone where the light cannot reach.

(A) 1 only
(B) 2 and 3 only
(C) 1 and 3 only
(D) 1, 2 and 3

Q11: Which of the following are primary pollutants?

(1) Carbon monoxide (CO)
(2) Sulphur oxides (SO2)
(3) Volatile Organic Compounds (VOCs)
(4) Nitric Oxide (NO)
(5) CFC's
(6) Radioactive pollutants

(A) 1, 2, 3 and 6 only
(B) 1, 2, 4 and 5 only
(C) 3, 4, 5 and 6 only
(D) 1, 2, 3, 4, 5 and 6

Q12: With reference to cloud seeding, consider the following statements:

(1) It is a weather modification technique that improves a cloud's ability to produce rain or snow by introducing tiny ice nuclei into certain types of subfreezing clouds.
(2) Aluminum hydroxide is the most common chemical used for cloud seeding.

(A) 1 only
(B) 2 only
(C) Both 1 and 2
(D) Neither 1 nor 2

Q13: In the context of National Air Quality Index (AQI), consider the following statements:

(1) AQI will have 'one number, one colour and one description'
(2) There are six AQI categories: good, satisfactory, moderately polluted, poor, very poor and severe
(3) The index considers eight pollutants PM10, PM2.5, NO2, SO2, CO, O3, NH3 and Pb

(A) 2 and 3 only
(B) 1 and 3 only
(C) 1 and 2 only
(D) 1, 2 and 3

Q14: Which of the following best describes the term Deep ecologism?
(A) A philosophy that believes in specific changes in daily lifestyle of humans to minimize the damage to the environment
(B) A philosophy that believes that humans should radically change their relationship with nature
(C) A set of sustainable practices to increase fish production in shallow ocean ecosystems
(D) None of the above

Q15: The ability of a population to increase under ideal environmental conditions is called:
(A) Natality
(B) Carrying capacity
(C) Biotic potential
(D) Absolute natality

Q16: A square shaped hole is punched in a metal sheet whose linear thermal expansion coefficient is 1x10^-3 per °C. The size of the hole will decrease by 10%, when:
(A) The sheet is heated by 10°C
(B) The sheet is heated by 100°C
(C) The sheet is cooled by 100°C
(D) The sheet is cooled by 10°C

Q17: Which among the following has the least thermal conductivity?
(A) metal
(B) semiconductor
(C) superconductor
(D) alloy

Q18: Symbol of material used in conventional glass thermometers is:
(A) Mg
(B) Hg
(C) Me
(D) Mn

Q19: The temperature variation of land near sea is very less compared to that far from sea. This is due to:
(A) Sun ray is not direct
(B) The sea absorbs the heat
(C) High heat capacity of humid air
(D) Heat is reflected by the sea

2022

96. One light year is equivalent to roughly how many kilometers?
(A) 1.5 trillion kilometer
(B) 4.5 trillion kilometer
(C) 7.5 trillion kilometer
(D) 9.5 trillion kilometer

97. Jet fuel used in turbine based aviation engine mainly consists of:
(A) Petrol
(B) Diesel
(C) Kerosene
(D) CNG

98. The light emitting diode (LED) is made of:
(A) Si
(B) Ge
(C) GaN
(D) Tungsten

99. Meniscus rise in glass thermometer is due to the change in:
(A) Density
(B) Mass
(C) Heat capacity
(D) Thermal conductivity

100. A glass of (1) tap water, (2) distilled water and (3) sea water is cooled to its solidification. The order in which they will solidify first is:
(A) tap water, distilled water, sea water
(B) distilled water, sea water, tap water
(C) sea water, tap water, distilled water
(D) distilled water, tap water, sea water

2021

Science and Technology Questions

Q1: Which of the following statements are correct in respect of India's GSAT-24 Satellite launching?

(i) It is a 24 Ku Band Communication Satellite.
(ii) It was launched from Kourou Space Centre in French Guiana.
(iii) This will provide coverage to Pan India.
(iv) It is launched by ISRO's powerful Rocket GSLV Mk III.

(A) (i), (ii) and (iv)
(B) (i), (ii) and (iii)
(C) (ii), (iii) and (iv)
(D) All are correct

Q2: Match List - I with List - II and give the correct answer using the codes given below the list:

List-I (Planet): (1) Mars, (II) Venus, (III) Saturn, (IV) Uranus

List-II (Nick-name): (i) Green Planet, (ii) Red Planet, (iii) Ringed Planet, (iv) Veiled Planet

(A) (I)-(ii), (II)-(iv), (III)-(iii), (IV)-(i)
(B) (I)-(ii), (II)-(iii), (III)-(iv), (IV)-(i)
(C) (I)-(i), (II)-(ii), (III)-(iii), (IV)-(iv)
(D) (I)-(iv), (II)-(ii), (III)-(iii), (IV)-(i)

Q3: On the ozone layer, the CFC has continuing their effects as:
(A) Reactions use up the Cl atoms formed by them leading to the degradation of ozone.
(B) Their efficient absorption by water vapours of the atmosphere.
(C) In reactions, the Cl atoms formed by them serve as catalysts leading to the degradation of ozone.
(D) They are constantly produced in increasing quantities, globally.

Q4: Inflammatory Bowel Disease (IBD) is a group of disorders that cause chronic inflammation in which of the following organs in human body?
(A) Intestines
(B) Brain
(C) Kidney
(D) Pancreas

Q5: Beyond Visual Line of Sight is an experiment, associated with which of the following device?
(A) Naval Ships
(B) Unmanned Aerial Vehicles
(C) Submarines
(D) Anti-tank Missile

Q6: In ethylene which of the following shape is acquired by the molecule?
(A) Linear
(B) Tetrahedral
(C) Coplanar triangular
(D) Hectohedral

Q7: Name the new tool that is aimed at matching potential volunteers to new clinical trials:
(A) Country without COVID
(B) World with less COVID
(C) Goal without COVID
(D) World without COVID

Q8: The world's first floating nuclear plant was developed by which of the following country?
(A) Russia
(B) India
(C) China
(D) USA

Q9: Which of the following cause is responsible for production of Radiocarbon in the atmosphere?
(A) Atmosphere lightning discharge in atmosphere
(B) Action of ultraviolet light from the Sun on atmospheric oxygen
(C) Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere
(D) Collision between fast neutrons and nitrogen nuclei present in the atmosphere

Q10: What was the active medium used in the first working laser ever constructed?
(A) Diamond block
(B) Helium-neon gas
(C) Ruby rod
(D) Carbon dioxide gas

Q11: 'Unicorn' is the name of which space body that was recently discovered at 1,500 light-years away from the Earth?
(A) Exo-plant
(B) Black hole
(C) Asteroid
(D) Satellite

Q12: What is Patania II, which was seen in the news recently, for being stranded on the Pacific Ocean floor?
(A) Container Ship
(B) Submarine
(C) Mining Robot
(D) Satellite module

Q13: Which company has acquired the Signal-rival messaging application Wickr?
(A) Google
(B) Amazon
(C) Microsoft
(D) Apple

2020

1. In the atmosphere which of the following carries the ozone layer?
(A) Exosphere
(B) Ionosphere
(C) Stratosphere
(D) Troposphere

2. Biochemical oxygen demand of water is a measure of:
(A) Water nitrate level
(B) Water phosphate level
(C) Water organic load
(D) Water pesticide load

3. Which of the following does not belong to natural air pollutant?
(A) Hydrocarbon
(B) SOx
(C) NOx
(D) Peroxyacetyl nitrate

4. Bats use __________ to navigate and find food.
(A) Resonance
(B) Magneto-reception
(C) Electroreception
(D) Echolocation

5. Nucleic acid present in corona virus is:
(A) Deoxyribonucleic acid
(B) Oxyribonucleic acid
(C) Ribonucleic acid
(D) Chromatin

6. Television signals are:
(A) Frequency modulated
(B) Amplitude modulated
(C) Both frequency and amplitude modulated
(D) Phase modulated

7. Electrical energy is converted into mechanical energy in:
(A) Dynamo
(B) Microphone
(C) Electric motor
(D) Heater

8. One light year is:
(A) The distance travelled by light in free space in one year
(B) The light emitted by sun in one year
(C) The time taken by light to travel from sun to earth
(D) Intensity of light emitted by sun in one year

9. Bleeding from nose is caused when a person is there at:
(A) Higher altitudes where atmospheric pressure is low
(B) Lower altitudes where atmospheric pressure is high
(C) Normal altitudes where atmospheric pressure is high
(D) No effect of altitude

10. The main component of biogas is:
(A) Butane
(B) Ethylene
(C) Methane
(D) Propane

11. Subatomic particles are:
(A) Electrons
(B) Protons
(C) Neutrons
(D) All of these

12. Carbon monoxide is a poisonous gas because it:
(A) Binds to digestive hormones
(B) Damages lungs
(C) Destroys RBCs
(D) Binds to haemoglobin

13. Which is NOT a synthetic polymer?
(A) PVC
(B) Nylon
(C) Polystyrene
(D) Resin

14. Bee sting causes severe pain and burning sensation due to the presence of:
(A) Acetic acid
(B) Sulfuric acid
(C) Citric acid
(D) Methanoic acid

15. Albinism is caused due to the deficiency of a/an:
(A) Hormone
(B) Enzyme
(C) Vitamin
(D) Metal

16. In ballpoint pens, dyes used are:
(A) Water based
(B) Alcohol based
(C) Glycerine based
(D) Oil based

17. Which one of the following colours is least deviated by the glass prism?
(A) Green
(B) Red
(C) Violet
(D) Orange

18. 'Ficus benghalensis' is the scientific name of:
(A) Brinjal
(B) Banana
(C) Peepal
(D) Banyan

19. Spirogyra is a kind of:
(A) Algae
(B) Fungi
(C) Bacteria
(D) Virus

20. Which of the following substances is not synthetic?
(A) Fibroin
(B) Lexan
(C) Neoprene
(D) Teflon

21. Change in the base sequence within a gene is called:
(A) Mutation
(B) Cloning
(C) Fusion
(D) Breeding

22. Hypsometer is used to measure:
(A) The pressure of gas
(B) The boiling point of liquids
(C) The level of humidity
(D) The depth of ocean

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