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MCQs

Total Questions : 217 | Page 3 of 22 pages
Question 21. The oxides of sodium (Na) and magnesium (Mg) react with water (H₂O) to give off
  1.    oxides
  2.    dioxide
  3.    hydroxides
  4.    chlorides
 Discuss Question
Answer: Option C. -> hydroxides
Answer: (c).hydroxides
Question 22. Group II metals burn with characteristic colors because
  1.    they are highly colored
  2.    they are reduced when they react
  3.    they are oxidized when they react
  4.    they are highly densed
 Discuss Question
Answer: Option C. -> they are oxidized when they react
Answer: (c).they are oxidized when they react
Question 23. Which metal is most vigorously hydrolyzed?
  1.    Be
  2.    Ca
  3.    Sr
  4.    Ba
 Discuss Question
Answer: Option D. -> Ba
Answer: (d).Ba
Question 24. Sulphuric(VI) acid (H₂SO₄) is formed upon the reaction of H₂O and
  1.    SO
  2.    SO₂
  3.    S₂O₂
  4.    SO₃
 Discuss Question
Answer: Option B. -> SO₂
Answer: (b).SO₂
Question 25. Metals are more reactive with oxygen
  1.    left to right in a period
  2.    right to left in a period
  3.    down the Group-II
  4.    up the Group-II
 Discuss Question
Answer: Option C. -> down the Group-II
Answer: (c).down the Group-II
Question 26. In Redox reactions, electrons maybe
  1.    gained only
  2.    lost only
  3.    shared
  4.    gained and lost
 Discuss Question
Answer: Option D. -> gained and lost
Answer: (d).gained and lost
Question 27. The species gaining electrons will be reduced and act as
  1.    reducing agent
  2.    oxidizing agent
  3.    neutralizing agent
  4.    reagent
 Discuss Question
Answer: Option B. -> oxidizing agent
Answer: (b).oxidizing agent
Question 28. Any specie can be reduced if the oxidation state is
  1.    oxidized
  2.    gained
  3.    reduced
  4.    lost
 Discuss Question
Answer: Option C. -> reduced
Answer: (c).reduced
Question 29. The oxide state of transition elements can be changed by treating it with a suitable
  1.    reactant
  2.    catalyst
  3.    reagent
  4.    none of above
 Discuss Question
Answer: Option C. -> reagent
Answer: (c).reagent
Question 30. The electrical conductivity of calcium is much higher than any
  1.    transition element
  2.    noble gas
  3.    alkali
  4.    acids
 Discuss Question
Answer: Option A. -> transition element
Answer: (a).transition element

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