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HYDROGEN MCQs

Total Questions : 35 | Page 3 of 4 pages
Question 21. During electrolysis of water , hydrogen is collected at
  1.    anode
  2.    cathode
  3.    positive electrode
  4.    All of above
 Discuss Question
Answer: Option B. -> cathode
Question 22. During electrolysis of water oxygen is collected at
  1.    anode
  2.    cathode
  3.    none
  4.    none of the above
 Discuss Question
Answer: Option A. -> anode
Question 23. Atomic no
  1.    1
  2.    2
  3.    3
  4.    4
 Discuss Question
Answer: Option A. -> 1
Question 24. Current leaves the electrolyte through the ________________
  1.    Cathode
  2.    anode
  3.    none
  4.    Both A & B
 Discuss Question
Answer: Option A. -> Cathode
Question 25. When hydrogen peroxide is shaken with an acidified solution of potassium dichromate in presence of ether, the ethereal layer turns blue due to the formation of
  1.    Cr2O3
  2.    CrO(O2)2
  3.    CrO4 2–
  4.    All of above
 Discuss Question
Answer: Option B. -> CrO(O2)2
Question 26. The hybridisation of oxygen atom is H2 O and H2O2 are, respectively
  1.    sp and sp3
  2.    sp3 and sp3
  3.    sp and sp2
  4.    sp and sp
 Discuss Question
Answer: Option B. -> sp3 and sp3
Question 27. In the laboratoryH2O2 is prepared by the action of
  1.    cold dilute H2SO4 on hydrated BaO2
  2.    dil.HCl on MnO2
  3.    cold H2SO4 on MnO2
  4.    aqueous alkali on Na2O2
 Discuss Question
Answer: Option A. -> cold dilute H2SO4 on hydrated BaO2
Question 28. Hydrogen is odorless, colorless and tasteless gas
  1.    True
  2.    False
 Discuss Question
Answer: Option A. -> True
Question 29. ___________ is the radioactive isotope of Hydrogen
  1.    Deuterium
  2.    Tritium
 Discuss Question
Answer: Option B. -> Tritium
Question 30. Passing electric current through aqueous solution/ molten state to form ions
  1.    electrolysis
  2.    electrolyte
  3.    non electrolyte
  4.    Both A & B
 Discuss Question
Answer: Option A. -> electrolysis

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