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MCQs

Total Questions : 1678 | Page 43 of 168 pages
Question 421. Eample of more toxic element is
  1.    Fe
  2.    C
  3.    Hg
  4.    Ag
 Discuss Question
Answer: Option C. -> Hg
Answer: (c).Hg
Question 422. Poisoning of CO can be reversed by giving oxygen at pressure
  1.    Low
  2.    High
  3.    Moderate
  4.    Least
 Discuss Question
Answer: Option B. -> High
Answer: (b).High
Question 423. In water, most oxidizing agent is dissolved O₂ in the concentration ranges from
  1.    2 - 4 ppm
  2.    4 - 8 ppm
  3.    3 - 6 ppm
  4.    8 - 10 ppm
 Discuss Question
Answer: Option B. -> 4 - 8 ppm
Answer: (b).4 - 8 ppm
Question 424. PAN, Ozone, sulphuric acid, peroxybenzol, aldehydes and ketones are called
  1.    Primary pollutants
  2.    Secondary pollutants
  3.    Major pollutants
  4.    Minor pollutants
 Discuss Question
Answer: Option B. -> Secondary pollutants
Answer: (b).Secondary pollutants
Question 425. The gas essential for life is
  1.    O₂
  2.    CO₂
  3.    N₂
  4.    Ar
 Discuss Question
Answer: Option A. -> O₂
Answer: (a).O₂
Question 426. The word acid is derived from Latin word 'Acids' meaning
  1.    Sour
  2.    Salty
  3.    Sweet
  4.    Bitter
 Discuss Question
Answer: Option A. -> Sour
Answer: (a).Sour
Question 427. Best example of spontaneous reaction is
  1.    Pumping of water uphill
  2.    Lightning
  3.    Burning of coal
  4.    All of above
 Discuss Question
Answer: Option C. -> Burning of coal
Answer: (c).Burning of coal
Question 428. The substance present in small amount in the solution is
  1.    Solution
  2.    Solvent
  3.    Solute
  4.    Mixture
 Discuss Question
Answer: Option C. -> Solute
Answer: (c).Solute
Question 429. Decomposition of N₂O₅ is
  1.    First order reaction
  2.    Second order reaction
  3.    Third order reaction
  4.    Zero order reaction
 Discuss Question
Answer: Option A. -> First order reaction
Answer: (a).First order reaction
Question 430. All reactions occur in
  1.    A single step
  2.    A series of steps
  3.    Two steps
  4.    Both a and b
 Discuss Question
Answer: Option D. -> Both a and b
Answer: (d).Both a and b

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