General Science : General Knowledge Questions and Answers

Q21. How many layers of skin does a human have?

[A] 3

[B] 2

[C] 4

[D] 1

Q22. In a laser (say neon laser) all the atoms emit the light waves of 

[A] Same phase

[B] Same frequency

[C] Same amplitude

[D] All the above

Q23. Potassium Permanganate is used for purifying drinking water, because

[A] it is a reducing agent

[B] it is an oxidising agent

[C] it dissolves the impurities of water

[D] it is a sterilising agent

Q24. The intensity of Earthquakes is measured on

[A] Beaufort scale

[B] Mercalli scale

[C] Secant scale

[D] Richter scale

Q25. Which of the following is an example of terrestrial habitat?

[A] Swamp

[B] Grassland

[C] Lagoon

[D] Pond

Q26. The first synthetic fibre made by man was

[A] Nylon

[B] Terycott

[C] Polyester

[D] Rayon

Q27. Which of the following crop is known as Green Gold?

[A] Neem

[B] Tea

[C] Rice

[D] Coffee

Q28. The approximate diameter of the sun is ___________ times the diameter of Earth.

[A] 146

[B] 92

[C] 123

[D] 109

Q29. Plants synthesis protein from

[A] sugar

[B] amino acids

[C] starch

[D] fatty acids

Q30. The gases used in different types of welding would include

[A] oxygen and acetylene

[B] oxygen, acetylene and argon

[C] oxygen, hydrogen, acetylene and nitrogen

[D] oxygen and hydrogen