SCIENCE GK QUESTIONS AND ANSWERS
General awareness is most important for all the Government recruitment exams like UPSC, SSC, Railway, CTET, and in school examination also. The questions are based on the basic concepts of Physics, Biology, and Chemistry on daily life phenomena and are more important for all competitive exams.
General knowledge is the most important subject compared to any subject. The best way to increase general awareness is through a newspaper, the internet, etc.
Here are some best 50 science gk questions and answers that will help you in any examination like in school examination, UPSC, SSC, Railway, etc.
Top 50 General Science Question and Answers
Q1. What is the SI unit for measuring the intensity of the sound or noise?
Ans. Decibel
Q2. What is the SI unit of Mass?
Ans. Kilogram
Q3. What is the SI unit of time?
Ans. Second
Q4. What is the SI unit of electric current?
Ans. Ampere
Q5. What is the SI unit of Temperature?
Ans. kelvin
Q6. What is the SI unit of amount of substance?
Ans. Mole
Q7. What is the SI unit of luminous intensity?
Ans. Candela
Q8. Which type of mirror used in automobiles to see the traffic on the rear side?
Ans. Convex mirror
Q9. What is the SI unit of electrical resistance?
Ans. Ohm
Q10. What is the SI unit of electrical resistance?
Ans. Mho
Q11. At what temperature the numerical value on Celsius and Fahrenheit scales become equal?
Ans. -40
Let, C=F
C=5/9 (F-32)
THEREFORE F=5/9 (F-32)
9F=5(F-32)
9F=5F-160
9F-5F=-160
4F=-160
F=-40 [PROVED]
Q12. What is the major constituent of gobar gas?
Ans. Methane [CH4]
Q13. Which endocrine gland is also known as the master gland?
Ans. Pituitary gland
Q15. What is the functional unit of the kidney?
Ans. Nephron
Q16. ……………. Is responsible for water transportation in the plant?
Ans. Xylem
Q17. ……………. Is responsible for food transportation in the plant?
Ans. Phloem
Q18. Which gas is involved in the Bhopal gas tragedy?
Ans. Methyl isocyanate [ FORMULA- C2H3NO / CH3NCO ]
Q19. Which form of coal contains the highest percentage of carbon?
Ans. anthracite
Q20. Name the largest gland in the human body?
Ans. Liver
Q21. Iron is prevented from rusting by coating with zinc this process is called?
Ans. Galvanization
Q22. Name the instrument which uses sound waves to measure the depth of the Ocean?
Ans. SONAR
Q23. What is the full form of SONAR?
Ans. Sound navigation and ranging
Q24. In which of the following medium speed of sound will be maximum?
Ans. Steel / solid
Q25. What type of lens is used to correct the vision of a person suffering from myopia?
Ans. concave lens
Myopia {Condition in which close object appear clearly, but for once don't}
Q26. Which gas is used as a fire extinguisher?
Ans. Carbon dioxide (CO2)
Q27. Brass is an alloy of which two metal?
Ans. Copper (Cu) and Zinc (Zn)
Q28. What is the chemical name of milk of magnesia?
Ans. magnesium hydroxide [Mg(OH)2]
Q29. In vulcanization, process rubber can be hardened by adding?
Ans. sulpher (s)
Q30. Which vitamins plays important role in blood clotting?
Ans. Vitamin K
Q31. What is the scientific name of vitamin A?
Ans. Retinol
Q32. What is the scientific name of vitamin B1?
Ans. Thiamine
Q32. What is the scientific name of vitamin B2?
Ans. Riboflavin
Q32. What is the scientific name of vitamin B3?
Ans. Niacin
Q33. What is the scientific name of vitamin B5?
Ans. Pantothenic Acid
Q34. What is the scientific name of vitamin B6?
Ans. Pyridoxine
Q35. What is the scientific name of vitamin B7?
Ans. Biotin
Q36. What is the scientific name of vitamin B9?
Ans. Folic Acid
Q37. What is the scientific name of vitamin B12?
Ans. Cobalamin
Q38. What is the scientific name of vitamin C?
Ans. Ascorbic acid
Q39. What is the scientific name of vitamin D?
Ans. Calciferol
Q40. What is the scientific name of vitamin E?
Ans. Tocopherol
Q41. What is the scientific name of vitamin K?
Ans. Phytonadione
Q42. Optical Fibre used in communication works on which principle?
Ans. Total internal reflection of light [TIR]
Q43. Name the longest bone in the human body?
Ans. Femur
Q44. Name the smallest bone in the human body?
Ans. Stapes
Q45. ………….. Is called the powerhouse of the cell?
Ans. Mitochondria
Q46. What is the working principle of hydraulic brakes In automobiles?
Ans. Pascal’s law
Q47. The sun hit the earth through?
Ans. Radiation
Q48. Ozone Layer above the surface of earth protects from?
Ans. Ultraviolet rays
Q49. The audible range of sound for an average adult human being is?
Ans. 20 Hz To 20000Hz
Q50. The reason for a swimming pool to appear less deep than the actual depth is?
Ans. Refraction of light