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Unfortunately, Mr. M. Subramanian, who maintained this website lost his battle to cancer and passed away in July, 2019. The database has over 50,000 questions. If you are interested in purchasing the website/database, please reach out using the form here.
Khub.info Learn TNPSC exam and online pratice
Q1. Which of the following is used as a catalyst in the manufacture of sulphuric acid?
Q2. Oil of vitriol is………………
Q3. The term for the reaction between sugar and concentrated sulphuric acid is…
Q4. The head of a matchstick contains……………….
Q5. White phosphorous is a ………….
Q6. Iron sulphides, used in matches, act as the………..
Q7. Of the following which one is used for the treatment of blood cancer?
Q8. Of the following which one mainly contain phosphorous?
Q9. Who enunciated the laws of electrolysis?
Q10. The general purpose of electroplating is for……………
Q11. When an electric current is passed through the electrolyte ......
Q12. Who described the concept of electrolytic dissociation?
Q13. The degree of dissociation of an electrolyte depends on……..
Q14. The purpose of electrorefining is for the ……………..
Q15. A strong electrolyte in water………
Q16. Which of the following is an example of true solution?
Q17. Soda water is a solution of……….
Q18. The solute in the solution can be separated by…….
Q19. True Solution belongs to…….
Q20. An example of gas in liquid is ............
Q21. Smoke is an example of which of the following?
Q22. Brass is a solution of
Q23. What happens when copper sulphate is dissolved in water?
Q24. The content of Homo nuclear molecules are
Q25. Benzene is a …………..solvent
Q26. The general content of Organic compounds are……
Q27. How does an "anion" is formed?
Q28. How does a 'Cation" is formed?
Q29. In comparison, the melting point of covalent compounds to that of ionic compounds is.......
Q30. Which of the following bond is found in Sodium Chloride?
Q31. How does the Covalent bond is formed?
Q32. Among the following compounds, which compound does not conduct electricity?
Q33. In which of the following, Covalent compounds are soluble?
Q34. Ionic compounds are generally in ....... State.
Q35. Covalent compounds are generally in………….. State.
Q36. What is the term for the sum of number of protons and neutrons present in the atomic nucleus?
Q37. Sodium hasw atomic number 11 and mass number 23. What will be the number of neutrons in its nucleus?
Q38. What is the content in the Nucleus of an atom?
Q39. What happens when an electrons jumps from M Shell to K Shell?
Q40. Who suggested the concept of 'elliptical orbitals'?
Q41. Gain of one or more electrons by an atom in a chemical reaction is called….
Q42. The term for the loss of one or more electrons by an atom in a chemical reaction is........
Q43. Isotopes differ in their .....
Q44. The instrument used to identify isotopes is.........
Q45. Who among the following discovered the presence of isotopes in an element?
Q46. Atomic number is equal to the number of .....
Q47. The term for the total number of protons and neutrons present inside the nucleus is…...
Q48. How many electrons can be accommodated in d-orbital?
Q49. The term for the number of electrons present in the outermost orbital of an element is .....
Q50. The number of electrons that can be present in p-orbital is…..