General Science Questions and Answers PDF
General Science Questions and Answers PDF
Que 1. Which metal can be easily cut with a knife?
(a) Sodium (Na)
(b) Mercury (Hg)
(c) Copper (Cu)
(d) Iron (Fe)
Ans 1. Sodium (Na)
Que 2. What is Earth’s only natural satellite?
(a) Sun
(b) Mars
(c) Venus
(d) Moon
Ans 2. Moon
Que 3. The color of tomatoes turns red when ripe, because?
(a) Chlorophyll
(b) Acetic acid
(c) Chromoplast
(d) Due to cytoplasm
Ans 3. (c) Chromoplast
Reason: Chloroplasts are chlorophyll-containing organelles in plant cells. Chromoplasts that contain carotenoid pigments impart red, orange, or yellow colors to various fruits.
Que 4. What is the full form of ASLV?
(a) Augmented Satellite Launch Vehicle
(b) Automatic Satellite Launch Vehicle
(c) Aero Space Launch Vehicle
(d) Area Satellite Launch Vehicle
Ans 4. (a) Augmented Satellite Launch Vehicle
Explanation: ASLV stands for Augmented Satellite Launch Vehicle. It is small–lift launch vehicle five-stage solid–fuel rocket launch vehicle which is designed and operated by ISRO (Indian Space Research Organisation). It was developed to augment the payload capacity to 150 kg so that satellites weighing up to 150 kg could be placed into Low Earth Orbits (LEO).
Que 5. In which form the chemical compound RDX (Research Department Explosive) is used?
(a) As a composition
(b) As a reactor
(c) As an explosive
(d) As a nuclear weapon
Ans 5. (c) As an explosive
Explanation: RDX is also known as cyclonite or hexogen. The chemical name for RDX is hexahydro-1,3,5-trinitro-1,3,5-triazine. It is an odorless and tasteless white powder and is very explosive. RDX is a synthetic chemical, it does not occur naturally in the environment. It creates fumes when it is burned with other substances.
Que 6. Which of the following components increases the effectiveness of the Photosynthesis process?
(a) Ultraviolet
(b) Red
(c) Blue
(d) Infrared
Ans 6. (b) Red
Explanation: Red has a long wavelength, allowing it to radiate more energy and allow for an increased rate of photosynthesis in plants.
Que 7. Brass gets discolored in the air because of the presence of which of the following gases in air?
(a) Oxygen (O2)
(b) Hydrogen sulfide (H2S)
(c) Carbon dioxide (CO2)
(d) Nitrogen (N2)
Ans 7. (b) Hydrogen sulfide
Explanation: Brass is the combination of Copper (Cu) and Zinc (Zn). Copper reacts with sulfide ions and forms cupric sulfide which is black in color. While zinc reacts with H2S and forms zinc Sulphide which is faint red in color. Hence brass gets discolored when it is exposed to air.
Que 8. The study of flowers is known as:
(a) Phrenology
(b) Anthology
(c) Agrostology
(d) Palynology
Ans 8. (b) Anthology
Explanation: Floriculture is the study of flowers, their cultivation, and their applications. Anthology and floriculture are the same.
Que 9. Which animal never drinks water in its entire life?
(a) Kangaroo
(b) Hippopotamus
(c) Rat
(d) Kangaroo rat
Ans 9. (d) Kangaroo rat
Explanation: Kangaroo rat located in the southwestern deserts of the United States does not drink water for its whole lifespan. It gets all of its liquid from the plants, roots, and seeds it eats.
Que 10. What is the name of the indigenous glucometer, which was developed with the assistance from Indian Council of Medical (ICMR)?
(a) GlucoCheck
(b) GluCheck
(c) SugarCheck
(d) SuCheck
Ans 10. (d) SuCheck
Explanation: SuChek is a completely indigenous and affordable glucometer that is suitable for varied climatic conditions. It is validated as per international standards and has been developed with financial assistance from the Indian Council of Medical Research (ICMR).
General Science Questions and Answers PDF
Que 11. The best conductor of electricity is
(a) Silver
(b) Lead
(c) Copper
(d) aluminum
Ans 11. (a) Silver
Explanation: Silver is the best conductor because its electrons are freer to move than those of the other elements, thereby making it more suitable for the conduction of electricity and heat than any other element.
Que 12. What part of the skeletal system protects the brain?
(a) Spine
(b) Thigh
(c) Pelvis
(d) Skull
Ans 12. (d) Skull
Que 13. Due to the increase in the amount of carbon dioxide in the atmosphere
(a) Rises in temperature
(b) Decrease in temperature
(c) Change according to season
(d) Continuous decrease in temperature
Ans 13. (a) Rises in temperature
Explanation: Increase in CO2 in the atmosphere, makes the atmosphere warmer by trapping heat.
Que 14. Which type of fuel is used by GSLV in its operations?
(a) Only solid fuel
(b) Only liquid fuel
(c) Liquid in the first stage and solid in the second stage
(d) Solid in the first stage and liquid in the second stage
Ans 14. (d) Solid in the first stage and liquid in the second stage
Explanation: GSLV which stands for Geosynchronous Satellite Launch Vehicle is an expendable release system controlled by the Indian Space Research Organisation. It is a three-stage rocket. The first stage uses solid fuel, the second stage uses liquid fuel and the third stage uses gaseous fuel
Que 15. Biochemical compounds are used as..
(a) Skin Treatments
(b) Food preservatives
(c) Cooking Oils
(d) All of the above
Ans 15. (d) All of the above
Explanation: The biochemical compound is any compound that contains carbon and is found in living things. It is involved in every process of life i.e growth of the human body, digestion of food, respiration, etc.
Que 16. What is the weight of the human heart?
(a) 100 gms
(b) 300 gms
(c) 800 gms
(d) 1000 gms
Ans 16. (b) 300 gms
Explanation: The heart weights ranged from 156 to 422 g with an average of 245 g and a standard deviation of 52 g.
Que 17. Which of the following is a non-metal that remains liquid at room temperature?
(a) Phosphorous
(b) Bromine
(c) Chlorine
(d) Helium
Ans 17. (b) Bromine
Explanation: Bromine molecules are larger than the molecules of the gaseous halogens meaning that bromine molecules have a larger surface area for intermolecular interactions such as van der Waals interactions. This results in them experiencing stronger interactions with each other leading them to coalesce into the liquid phase.
Que 18. The pH value of human blood is:
(a) 6.6
(b) 7.2
(c) 7.4
(d) 7.8
Ans 18. (c) 7.4
Que 19. What is the physical phase of life called?
(a) Protoplasm
(b) Cytoplasm
(c) Organelles
(d) None of the above
Ans 19. (a) Protoplasm
Explanation: Protoplasm is known as physical basis of life in a cell. Protoplasm comprises of the living part of the cell including the cytoplasm, nucleus and other organelles and carries out all the processes necessary for life, like processing nutrients and oxygen, converting food into living matter, producing new cells etc.
Que 20. The research centre of which organisation have developed full-body disinfection chamber called ‘Personnel Sanitization Enclosure’ (PSE)?
(a) Defence Research and Development Organisation (DRDO)
(b) All India Institute of Medical Science (AIMS)
(c) Indian Institute of Science (IIS)
(d) Bharat Heavy Electronics Limited (BHEL)
Ans 20. (a) Defence Research and Development Organisation (DRDO)
Explanation: One of the Defence Research and Development Organisation laboratories Vehicle Research Development Establishment (VRDE), Ahmednagar has designed a full-body disinfection chamber called a Personnel Sanitisation Enclosure (PSE).
This enclosure is a walk-through set-up, which is designed for personnel sanitization. The portable system which sanitizes one person at a time is equipped with a sanitizer and soap dispenser. An electrically operated pump creates a disinfectant mist of hypo sodium chloride for 25 seconds.
Que 21. What tissue connects muscles to bones?
(a) Skin
(b) Blood vessels
(c) Fat
(d) Tendon
Ans 21. (d) Tendon
Explanation: A tendon is a fibrous connective tissue that attaches muscle to bone. Tendons may also attach muscles to structures such as the eyeball. A tendon serves to move the bone or structure.
Que 22. Raindrops are spherical–
(a) Falling from above
(b) Due to surface tension
(c) Due to the viscosity of water
(d) Due to air friction
Ans 22. (b) Due to surface tension
Explanation:
Que 23. When lemon juice is added to soda water, bubbles start coming out because it contains
(a) Alkali
(b) Acid
(c) Indifferent
(d). All of the above
Ans 23. (b) Acid
Explanation: Acid causes evolution of CO2.
Que 24. Which nutrient plays an essential role in muscle-building?
(a) Protein
(b) Carbohydrate
(c) Iron
(d) Fat
Ans 24. (a) Protein
Explanation: Protein is one of the most essential macronutrients for muscle growth and repair because it’s packed with amino acids that your body does and doesn’t produce. That’s why it’s important to have protein post-workout to restore these muscle-building macronutrients.
Que 25. Who discovered insulin?
(a) Karl Benz
(b) Louis Pasteur
(c) Niels Bohr
(d) F. G. Vating
Ans 25. (d) F. G. Vating
Explanation: Sir Frederick Banting, a physician, and scientist was the co-discoverer of insulin, a hormone of critical importance in regulating blood sugar levels.
Que 26. When The Indian Space Research Organisation (ISRO) was set up?
(a) 1962
(b) 1969
(c) 1972
(d) 1952
Ans 26. (b) 1969
Explanation: Indian space agency, was founded in 1969 to develop an independent Indian space program. Its headquarters are in Bengaluru (Banglore). ISRO’s chief executive is a chairman, who is also chairman of the Indian government’s Space Commission and the secretary of the Department of Space.
Que 27. Tell the composition of soap.
(a) Sodium salt with fatty acids.
(b) Potassium salt with fatty acids
(c) Both a & b
(d) Sodium and Potassium salt mixed with chemicals
Ans 27. (c) Both a & b
Explanation: Soaps are potassium or sodium salts of a Carboxylic acid having a long aliphatic chain attached to it.
Detergents are the potassium or sodium salts of a long alkyl chain ending with a sulfonate group.
Que 28. What is the lifespan of RBC?
(a) 130 days
(b) 110 days
(c) 100 days
(d) 120 days
Ans 28. (d) 120 days
Que 29. Which of the following gland controls blood pressure?
(a) Thalamus gland
(b) Adrenal gland
(c) Thyroid gland
(d) Pancreas gland
Ans 29. (b) Adrenal gland
Explanation: Adrenal glands, also known as suprarenal glands, are small, triangular-shaped glands located on top of both kidneys. Adrenal glands produce hormones that help regulate your metabolism, immune system, blood pressure, response to stress, and other essential functions.
Que 30. Which of the following metals forms an amalgam with other metals?
(a) Tin
(b) Mercury
(c) Lead
(d) Zinc
Ans 30. (b) Mercury
Explanation: Alloy obtained after mixing mercury with another metal is called Amalgam. All metals but Iron, Platinum, Tungsten, and Tantalum form an Amalgam with mercury. Silver and gold amalgams are used to fill tooth cavities in dentistry.
General Science Questions and Answers PDF
Que 31. Hemoglobin is a:
(a) Protein
(b) Carbohydrate
(c) Fat
(d) Vitamins
Ans 31. (a) Protein
Explanation: Iron is an essential element for blood production. About 70 percent of your body’s iron is found in the red blood cells of your blood called haemoglobin and in muscle cells called myoglobin. Haemoglobin is essential for transferring oxygen in your blood from the lungs to the tissues.
Haemoglobin is a protein; a molecule contains four polypeptide chains (a tetramer), each chain consisting of more than 140 amino acids. To each chain is attached a chemical structure known as a haem group.
Que 32. The largest cell is
(a) Nerve Cell
(b) Ovum
(c) The egg of an Ostrich
(d) None of the above
Ans 32. (c) The egg of an Ostrich
Que 33. Anosmia, which was in news recently, is associated with which biological phenomenon?
(a) Loss of smell
(b) Loss of taste
(c) Loss of perspiration
(d) Loss of skin sensitivity
Ans 33. (a) Loss of smell
Explanation: As per the revised clinical management protocols released by the Union Health Ministry, Anosmia (called Loss of smell) and Ageusia (called Loss of taste) have been added to the official list of COVID-19 symptoms.
These symptoms are continuously reported by coronavirus-infected patients before the beginning of respiratory symptoms. Health Ministry also approved the use of Remdesivir to treat Covid-19 in the moderate stage of criticality and the use of HCQ (hydroxychloroquine) to treat Covid-19 in the early stages.
Que 34. The colour of a cut apple turns brown after some time because it reacts with air to form
(a) Iron Oxide
(b) Potassium oxide
(c) Aluminium oxide
(d) Sodium oxide
Ans 34. (a) Iron Oxide
Explanation: A fresh apple when cut turns brown after some time because of a Chemical Change. When an apple is cut the oxygen from the air comes in contact with it and rapidly oxidize phenolic compounds naturally present in the apple tissues to o-quinones, colourless precursors to brown-colored secondary products.
Que 35. Similar body cells group together to form a
(a) Organ
(b) Tissue
(c) Blood vessels
(d) Joints
Ans 35. (b) Tissue
Explanation: Tissues are groups of cells that have a similar structure and act together to perform a specific function. There are four different types of tissues in animals: connective, muscle, nervous, and epithelial. In plants, tissues are divided into three types: vascular, ground, and epidermal. Groups of tissues make up organs in the body such as the brain and heart.
Que 36. who invented dynamite?
(a) Alfred Nobel
(b) Thomas Alva Edison
(c) Galileo Galilei
(d) Charles Darwin
Ans 36. (a) Alfred Nobel
Que 37. Which of the following is NOT true about Indian space research?
(a) The first satellite launched in India was Aryabhatta.
(b) Great scientist Dr. Vikram Sarabhai is known as the father of Indian space research.
(c) ISRO was set up in 1962.
(d) IRSO reports to the Department of Space, India
Ans 37. (c) ISRO was set up in 1962.
Que 38. Define toxicity.
(a) A chemical reaction
(b) A process used in the manufacturing of detergents
(c) A harmful effect of soaps and detergents required to measure the effectiveness.
(d) A process used in the manufacturing of soaps
Ans 38. (c) A harmful effect of soaps and detergents is required to measure their effectiveness.
Que 39. Which of the following is one of the functions of antigen?
(a) Lowers body temperature
(b) Destroys harmful bacteria
(c) Triggers the immune system
(d) Used as an antidote to the poison
Ans 39. (c) Triggers the immune system
Explanation: Antigens are large molecules of proteins, present on the surface of the pathogen- such as bacteria, fungi viruses, and other foreign particles. When these harmful agents enter the body, it induces an immune response in the body for the production of antibodies.
Que 40. The gas usually filled in the electric bulb is
(a) Nitrogen
(b) Hydrogen
(c) Carbon dioxide
(d) Oxygen
Ans 40. (a) Nitrogen
Explanation: Incandescent light bulbs are filled with an inert gas like nitrogen, argon, or krypton – so that the filament doesn’t catch fire.
General Science Questions and Answers PDF
Que 41. Accumulation of which one of the following in our muscles leads to fatigue:
(a) Lactic Acid
(b) Pyruvic Acid
(c) Benzoic Acid
(d) Uric Acid
Ans 41. (a) Lactic Acid
Explanation: Lactic acid is formed and accumulated in the muscle under conditions of high energy demand, rapid fluctuations of the energy requirement, and insufficient supply of O2.
Que 42. What is the name of the cells in the body that engulf foreign particles like bacteria?
(a) Phagocytes
(b) Globulin
(c) Fibrinogen
(d) Albumin
Ans 42. (a) Phagocytes
Explanation: The process where these white blood cells surround, engulf, and destroy foreign substances is called phagocytosis, and the cells are collectively referred to as phagocytes.
Que 43. Researchers of which organization have developed Diagnostic therapy drug candidates for lung cancer?
(a) AIIMS
(b) IIT Delhi
(c) JNCASR
(d) ICMR
Ans 43. (c) JNCASR (Jawaharlal Nehru Centre for Advanced Scientific Research)
Explanation: Researchers at Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR) have developed a theragnostic (diagnostic therapy) drug candidate for lung cancer.
JNCASR is an autonomous institute under the Department of Science & Technology (DST), Govt. of India. Lung cancer is one of the most common causes of cancer-related death and is tough to detect at early stages thereby making it difficult to treat.
Que 44. Which of the following substances is found in green henna, due to which it turns red?
(a) Lawsone
(b) Potassium
(c) Carbon
(d) Iron
Ans 44. (a) Lawsone
Explanation: The lawsone in the dye preparation migrates into the outer layer of the skin and binds to the skin’s keratin protein. This produces a red-brown stain which can last for up to six weeks until the outer layer of skin is naturally shed.
Que 45. Which biologist proposed the theory of evolution through natural selection?
(a) Charles Darwin
(b) Stephen Hawking
(c) Francesco Redi
(d) Alexander Fleming
Ans 45. (a) Charles Darwin
Que 46. Why do colors appear in soap bubbles due to the incident of light?
(a) Due to scattering
(b) Due to interference
(c) Due to deflection
(d) Due to polarization
Ans 46. (b) Due to interference
Explanation: Colours are seen due to interference between waves reflected from the top and bottom of the soap bubble.
Que 47. IRNSS (Indian Regional Navigation Satellite System) is a
(a) Navigation satellite
(b) Space mission
(c) MARS mission
(d) Geo stationary satellite
Ans 47. (a) Navigation satellite
Explanation: The IRNSS-1C is a navigation satellite that was designed, developed, and launched by the Indian Space Research Organisation (ISRO) in October 2014. It was launched into the geosynchronous transfer orbit (GTO) by a polar satellite launch vehicle (PSLV) from Satish Dhawan Space Centre located in Sriharikota.
The objective of the satellite is to provide standard positioning services (SPS) and restricted services (RS) covering India. The satellite will be placed at a geostationary orbital position of 83° east longitude.
Que 48. Which of the following process does not involve the evolution of CO2?
(a) Combustion
(b) Respiration
(c). Fermentation
(d) Photosynthesis
Ans 48. (d) Photosynthesis
Que 49. Quartz crystals normally used in quartz clocks etc. is chemically
(a) Silicon dioxide
(b) Germanium oxide
(c) A mixture of germanium oxide and silicon dioxide
(d) Sodium silicate
Ans 49. (a) Silicon dioxide
Que 50. Which one of the following metals is used with iron to make it rust-free:
(a) Aluminium
(b) Carbon
(c) Chromium
(d) Tin
Ans 50. (c) Chromium
Explanation: Iron alloys containing chromium in amounts greater than ~11% are considered stainless. They are resistant to corrosion and staining, and will not rust.
General Science Questions and Answers PDF
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