Skip to content
GK24
Prime

General Science GK Questions with Answers – Page 18

हिंदी में पढ़ें

General Science multiple choice questions with answers and explanations, 20 per page, for SSC, Banking, UPSC, Railway and state exams.

2541 questions

General Science NotesOnly previous-year questions (1911)GK Quiz
Q341.General ScienceAsked in: NDA · NDA-I 2024, GATEasy

Leaves of most plants appear green because the chlorophyll present in it :

  1. A.absorbs red and blue light while reflecting green light.
  2. B.absorbs green light only.
  3. C.absorbs green light while reflecting red and blue light.
  4. D.reflects red light and absorbs blue and green light.
Show answer
Correct answer: A. absorbs red and blue light while reflecting green light.

The green light that chlorophyll does not use is reflected back to our eyes, so leaves look green. White sunlight contains all the colours of the visible spectrum.

Q342.General ScienceAsked in: NDA · NDA-I 2025, GATEasy

The vector of malaria parasites is

  1. A.Male Anopheles mosquito
  2. B.Male Culex mosquito
  3. C.Female Anopheles mosquito
  4. D.Female Culex mosquito
Show answer
Correct answer: C. Female Anopheles mosquito

Only the female Anopheles bites humans for blood, and in doing so it passes the malaria parasite, Plasmodium, into the bloodstream.

Q343.General ScienceAsked in: CDS · CDS-II 2019, GKEasy

Consider the following statements : 1. Particles of matter intermix on their own. 2. Particles of matter have force acting between them. Which of the statements given above is/are correct?

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

Particles of matter mix with one another on their own, and there are forces of attraction between them; both are basic properties taught in Class 9 science.

Q345.General ScienceAsked in: CDS · CDS-II 2018, GKMedium

Which of the following roles is/are played by epididymis, vas deferens, seminal vesicles and prostate in male reproductive system of human?

  1. A.Spermatogenesis and maturation of sperms
  2. B.Maturation and motility of sperms
  3. C.Spermatogenesis and motility of sperms
  4. D.Motility of sperms only
Show answer
Correct answer: B. Maturation and motility of sperms

These ducts and glands do not make sperm; they help sperm mature, store and move them, and add the fluid in which sperm swim.

Q348.General ScienceAsked in: NDA · NDA-II 2021, GATMedium

Weight and mass of an object are defined with Newton's laws of motion. Which among the following is true ?

  1. A.Weight is a constant of proportionality.
  2. B.Mass is a constant of proportionality.
  3. C.Mass is not a constant of proportionality.
  4. D.Weight is a universal constant.
Show answer
Correct answer: B. Mass is a constant of proportionality.

In Newton's second law, F = ma, the force on a body is proportional to its acceleration, and the constant linking the two is the body's mass.

Q349.General ScienceAsked in: NDA · NDA-I 2025, GATEasy

Initial discovery of antibiotic penicillin was done by

  1. A.Francis Crick
  2. B.Maurice Wilkins
  3. C.Charles Darwin
  4. D.Alexander Fleming
Show answer
Correct answer: D. Alexander Fleming

The Scottish scientist discovered penicillin in 1928 at St Mary's Hospital in London. Fleming noticed that a mould, Penicillium notatum, had accidentally grown on a culture plate of Staphylococcus bacteria and had killed the bacteria around it.

Q350.General ScienceAsked in: NDA · NDA-I 2017, GATMedium

Which one of the following statements is NOT correct ?

  1. A.In the conduction mode of transference of heat, the molecules of solid pass heat from one molecule to another without moving from their positions
  2. B.The amount of heat required to raise the temperature of a substance is called its specific heat capacity
  3. C.The process of heat transfer in liquids and gases is through convection mode
  4. D.The process of heat transfer from a body at higher temperature to a body at lower temperature without heating the space between them is known as radiation
Show answer
Correct answer: B. The amount of heat required to raise the temperature of a substance is called its specific heat capacity

Specific heat capacity is the heat needed to raise the temperature of a unit mass of a substance by one degree, not simply the heat needed to raise its temperature.

Q351.General ScienceAsked in: NDA · NDA-II 2021, GATEasy

Buoyancy is a/an

  1. A.upward pressure
  2. B.downward pressure
  3. C.downward force
  4. D.upward force
Show answer
Correct answer: D. upward force

Buoyancy, or upthrust, is the upward force a fluid exerts on any object immersed in it. A fluid presses on an object from all sides, but the pressure grows with depth, so the push on the lower surface is greater than the push on the upper surface.

Q359.General ScienceAsked in: NDA · NDA-II 2023, GATMedium

Which among the following statements with respect to carbon is/are correct?

1. Carbon forms the basis for all living organisms and many things we use

2. Carbon shows tetra-valency and the property of catenation

3. Carbon forms covalent bonds with itself and other elements

4. Carbon forms compounds containing triple and tetra bonds between carbon atoms

Select the correct answer using the code given below :

  1. A.1 only
  2. B.1 and 2 only
  3. C.1, 2 and 3
  4. D.2 and 4
Show answer
Correct answer: C. 1, 2 and 3

Statements 1, 2 and 3 are true, but carbon never forms a quadruple, or tetra, bond between two carbon atoms.