CBSE  /  Class 10  /  Science  /  Carbon and Its Compounds

  • 1. 
    A reagent which can help us to distinguish between alkenes and alkynes is:

  • Bromine water
  • Carbon tetrachloride
  • Alkaline KMnO
  • Ammoniacal cuprous chloride

  • 2. 
    The correct structural formula of butanoic acid is
    MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers 1

  • a
  • b
  • c
  • d

  • 3. 
    The soap molecule has a

  • hydrophilic head and a hydrophobic tail
  • hydrophobic head and a hydrophilic tail
  • hydrophobic head and a hydrophobic tail
  • hydrophilic head and a hydrophilic tail

  • 4. 
    Detergents can be used for washing of clothes

  • only in hard water
  • only in soft water
  • both in soft and hard water
  • None of the above

  • 5. 
    Which among the following are unsaturated hydrocarbons?
    MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers 2

  • (i) and (iii)
  • (ii) and (iii)
  • (ii) and (iv)
  • (iii) and (iv)

  • 6. 
    Acetic acid was added to a solid X kept in a test tube. A colourless, odourless gas Y was evolved. The gas was passed through lime water, which turned milky. It was concluded that

  • solid X is sodium hydroxide and the gas Y is CO2
  • solid X is sodium bicarbonate and the gas Y is CO2
  • solid X is sodium acetate and the gas Y is CO2
  • solid X is sodium bicarbonate and the gas Y is SO2.

  • 7. 
    Pentane has the molecular formula C5H12. It has

  • 5 covalent bonds
  • 12 covalent bonds
  • 16 covalent bonds
  • 17 covalent bonds

  • 8. 
    Structural formula of ethyne is
    MCQ Questions for Class 10 Science Chapter 4 Carbon and Its Compounds with Answers 3

  • a
  • b
  • c
  • d

  • 9. 
    A student while observing the properties of acetic acid would report that this smells like

  • vinegar and turns red litmus blue
  • rotten egg and turns red litmus blue
  • vinegar and turns blue litmus red
  • rotten egg and turns blue litmus red

  • 10. 
    Vinegar is a solution of

  • 50% – 60% acetic acid in alcohol
  • 5% – 8% acetic acid in alcohol
  • 5% – 8% acetic acid in water
  • 50% – 60% acetic acid in water
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