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  • Question
  • Which one of the following statements is correct?


  • Options
  • A. The oxidation number for hydrogen is always zero.
  • B. The oxidation number for hydrogen is always + 1.
  • C. The oxidation number for hydrogen is always -1.
  • D. Hydrogen can have more than one oxidation number.

  • Correct Answer
  • Hydrogen can have more than one oxidation number. 

    Explanation

    Hydrogen has two possible oxidation numbers: +1 and -1.

    -1 in case of hydrides.

  • Tags: Bank Exams

    Chemistry problems


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    • 1. Highest percentage of carbon is found in which form of coal?

    • Options
    • A. Anthracite
    • B. Bituminous
    • C. Peat
    • D. lignite
    • Discuss
    • 2. Which one of the following elements does not form solid hydrogen carbonate?

    • Options
    • A. Sodium
    • B. Potassium
    • C. Caesium
    • D. Lithium
    • Discuss
    • 3. Bee sting contains________________

    • Options
    • A. An acidic liquid
    • B. a salt solution
    • C. an alkaline liquid
    • D. a corrosive liquid
    • Discuss
    • 4. Which one of the followingis notan allotrope of carbon?

    • Options
    • A. Coal
    • B. Diamond
    • C. Graphite
    • D. Graphene
    • Discuss
    • 5. Which of the following compounds from nitrites with nitrous acid?

    • Options
    • A. Primary amines
    • B. Secondary amines
    • C. Tertiary amines
    • D. All of these
    • Discuss
    • 6. Match List -I with List -II and select the correct answer using the code given below the Lists : List -I List-II (Compound/Molecule) (Shape of Molecule) A. CH3F 1. Trigonal planar B. HCHO 2. Tetrahedral C. HCN 3. Trigonal pyramidal D. NH3 4. Linear

    • Options
    • A. 2 4 1 3
    • B. 2 1 4 3
    • C. 3 4 1 2
    • D. 3 1 4 2
    • Discuss
    • 7. Which one of the following elements cannot be detected by "Lassaigne's test"?

    • Options
    • A. I
    • B. Cl
    • C. S
    • D. F
    • Discuss
    • 8. In which of the following, functional group isomerism is not possible?

    • Options
    • A. Alcohols
    • B. Aldehydes
    • C. Alkyl halides
    • D. Cyanides
    • Discuss
    • 9. Which one of the following statements is not correct?

    • Options
    • A. Fischer projection represents the molecule in an eclipsed conformation
    • B. Newman projection can be represented in eclipsed, staggered and skew conformations
    • C. Fischer projection of the molecule is its most stable conformation
    • D. In Sawhorse projections, the lines are inclined at an angle of 120 deg to each other.
    • Discuss
    • 10. Which of the following is most important for absorption of heat radiated from the Sun as well as from the Earth?

    • Options
    • A. Carbon dioxide
    • B. Oxygen
    • C. Carbon monoxide
    • D. Nitrogen
    • Discuss


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