General Science Questions and Answers

SCIENCE GK QUESTIONS AND ANSWERS

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


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