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General Knowledge on Chemistry

(Click on suggested Options to select the answer | Color Red means : Wrong & Green Means: Correct)
31. Which one among the following is the natural polymer?
32. Which one among the following statement about an atom is not correct?
  • A. Atoms always combine to from molecule
  • B. Atoms are the basic units from which molecules and ions are formed
  • C. Atoms are always neutral in nature
  • D. Atoms aggregate in large numbers to from the matter that we can see, feel and touch
  • Check Answer | Discussion
33. Which one of the following is used as a mordant in dyeing and tanning industry?
34. The product of equivalent weight and valency of an element is equal to
35. Motion of an oscillating liquid column in a U-tube is
  • A. periodic but not simple harmonic
  • B. non-periodic
  • C. simple harmonic and time period is independent of the density of the liquid
  • D. simple harmonic and time period depends of the density of the liquid
  • Check Answer | Discussion
36. Why hard water does not give lather with soap?
  • A. Hard water contains calcium and magnesium ions, which from precipitate with soap
  • B. Hard water contains sulphate and chloride ions, which from precipitate
  • C. pH of hard water is high
  • D. pH of hard water is less
  • Check Answer | Discussion
37. Which one among the following chemicals can be used to clean the surface of gold ornaments?
  • A. Sodium thiosulphate solution
  • B. Aqua-regia
  • C. Concentrated sodium hydroxide
  • D. Concentrated sulphuric acid
  • Check Answer | Discussion
38. Which one of the following has been producing/can produce light by a chemical change?
39. Which one of the following enzyme is used to digest gelatine in the process of recovering silver from the photographic film?
40. The most electronegative element among the following is

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