Sail E0 Webinar

General Knowledge > General Science

CHEMISTRY MCQs

Total Questions : 2589 | Page 6 of 259 pages
Question 51. Silver nitrate solution is kept in brown bottles in laboratory because
  1.    It reacts with ordinary white bottles
  2.    Brown bottles stops the passage of light through it
  3.    Brown bottles do not react with it
  4.    Brown bottles react with it
 Discuss Question
Answer: Option B. -> Brown bottles stops the passage of light through it
Question 52. Which colour is produce by Arsenic during flame test?
  1.    Green
  2.    Red
  3.    Crimson
  4.    Blue
 Discuss Question
Answer: Option D. -> Blue
Question 53. Bleaching action of moist sulphur dioxide is because of its
  1.    Basic property
  2.    Acidic property
  3.    Oxidising property
  4.    Reducing property
 Discuss Question
Answer: Option C. -> Oxidising property
Question 54. Which one of the following is commonly used for pulp bleaching in the paper industry?
  1.    Mild sulphuric acid
  2.    Glucose isomerase
  3.    Hydrogen peroxide
  4.    Iodine and water
 Discuss Question
Answer: Option C. -> Hydrogen peroxide
Question 55. Sulphur dioxide bleaches colouring matter by :
  1.    Reduction
  2.    Dehydration
  3.    Decomposition
  4.    Oxidation
 Discuss Question
Answer: Option A. -> Reduction
Question 56. Which one of the following is used to restore the colour of old oil paintings ?
  1.    Ozone
  2.    Hydrogen peroxide
  3.    Barium peroxide
  4.    Sodium peroxide
 Discuss Question
Answer: Option B. -> Hydrogen peroxide
Question 57. In upper layer of atmosphere ozone is formed by
  1.    The action of ultraviolet rays on oxygen
  2.    The combination of oxygen molecules
  3.    Subjecting oxygen to high pressure
  4.    The action of nitrogen on oxygen in atmosphere
 Discuss Question
Answer: Option A. -> The action of ultraviolet rays on oxygen
Question 58. Ozone consists of
  1.    Oxygen only
  2.    Oxygen and Nitrogen
  3.    Hydrogen and Carbon
  4.    Oxygen and Carbon
 Discuss Question
Answer: Option A. -> Oxygen only
Question 59. Ozone layer is present in
  1.    Troposphere
  2.    Ionosphere
  3.    Stratosphere
  4.    Exosphere
 Discuss Question
Answer: Option C. -> Stratosphere
Question 60. The presence of ozone in the stratosphere is responsible for
  1.    Increasing the average global temperature in recent years
  2.    Higher rate of photosynthesis
  3.    Checking the penetration of ultraviolet rays to the earth
  4.    Supplying oxygen for people travelling in jets
 Discuss Question
Answer: Option C. -> Checking the penetration of ultraviolet rays to the earth

Latest Videos

Latest Test Papers