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Khub.info Learn TNPSC exam and online pratice
Q1. Of the following, which one is present in the Sun?
Q2. What is the percentage of gold in an 18 carat gold ornament?
Q3. In a 22 carat gold ornament, what is the percentage of gold content?
Q4. What type of iron is used for making rails and sewage pipes?
Q5. Earth's composition of iron is.......
Q6. Among the following which one is used for making electromagnets?
Q7. What is the most important ore of iron?
Q8. What is the purest form of iron?
Q9. The most common ore of aluminium is........
Q10. Among the following which one will be in liquid state at room temperature?
Q11. Which of the following compound has the strong smell of Chlorine?
Q12. What is the acid present in apples?
Q13. What is the acid present in grapes and tamarind?
Q14. pH value of a base is ...
Q15. pH value of soft drinks is
Q16. pH value of neutral solution is.......
Q17. pH value of gastric juice is.......
Q18. The chemical name of vinegar is........
Q19. Among the following which one is used in the manufacture of surgical instruments?
Q20. By addition of what the setting rate of cement is slowed down?
Q21. What is the chemical name of bleaching powder?
Q22. The bleaching nature of bleaching powder is due to the evolution of nascent…………………
Q23. Baking powder is........
Q24. Among the following which steel is used for manufacturing electro magnet?
Q25. Which steel is used for manufacturing drilling tools?
Q26. Which of the following is used is medicine as well as in production of toys?
Q27. Which one of the following is used in the fire extinguishers?
Q28. What causes the setting of plaster of paris?
Q29. Among the following which one acts as an antacid?
Q30. Production of 'bleaching powder' involves the passing of Chlorine through……..
Q31. Concentrated solution of sodium chloride is known as……
Q32. How the reaction between Barium Chloride and dilute Sulphuric acid is classified?
Q33. Which of the following turns a red litmus to blue?
Q34. Which of the following turns a blue litmus to red?
Q35. Among the following which one has a bitter taste?
Q36. pH value of blood is.......
Q37. Arrhenius concept of an acid is the one that……..
Q38. An acid has which of the following tastes?
Q39. The reaction in which the reactants absorb light are called………
Q40. Combustion reactions are always
Q41. Among the following which one is used as a catalyst in the decomposition of Hydrogen peroxide?
Q42. Among the following which one acts as a "catalyst"in the laboratory preparation of Oxygen?
Q43. Rusting of is an example of .....
Q44. If the pH of a solution is zero, then it would be a .....
Q45. Which of the following acid is the strongest?
Q46. Among the following acids which one is not the strongest?
Q47. When Zinc reacts with hydrochloric acid which of the following gas will get liberated?
Q48. What will be pH of 0.1m NaOH?
Q49. What will be the pH of 0.1m HCl?
Q50. What will be the pH of 0.01m HCl?
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