Carbon and its Compounds MCQ With Answers

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Free PDF Download of CBSE Class 10 Science Chapter 4 Carbon and its Compounds MCQ With Answers.

The two characteristic features are seen in carbon, that is, tetravalency and catenation, put together give rise to a large number of compounds. Many have the same non-carbon atom or group of atoms attached to different carbon chains. These compounds were initially extracted from natural substances and it was thought that these carbon compounds or organic compounds could only be formed within a living system. That is, it was postulated that a ‘vital force’ was necessary for their synthesis. Friedrich Wöhler disproved this in 1828 by preparing urea from ammonium cyanate. But carbon compounds, except for oxides of carbon, carbonate, and hydrogen carbonate salts continue to be studied under organic chemistry

  1. Which of the following statements are correct for carbon compounds?
    (i) Most carbon compounds are good conductors of electricity.
    (ii) Most carbon compounds are poor conductors of electricity.
    (iii) Force of attraction between molecules of carbon compounds is not very strong.
    (iv) Force of attraction between molecules of carbon compounds is very strong.
    (a) (ii) and (iv)
    (b) (ii) and (iii)
    (c) (i) and (iv)
    (d) (i) and (iii)

    Answer b
    As in general carbon forms only covalent bonds as accepting and donating four electrons is very difficult. As all are covalent compounds these are poor conductors of electricity. They do not have strong forces because covalent bond is weaker than ionic bond. Hence, option D is the correct answer.

  2.  
  • C3H8 belongs to the homologous series of CnH2n+2 Alkane !
  • C3H6 belongs to the homologous series of CnH2n Alkene !
  • C3H4 belongs to the homologous series of CnH2n-2 Alkyne !
  • Alkene and alkyne will undergo addition reactions.
  • Ethanol on complete oxidation gives CO2 and water
  • CH3COOH will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid

Fill in the Blanks
1. ………. is a versatile element that forms the basis for all living organisms and many of the things we use.
2. Covalent bonds are formed by the ………. of electrons between two atoms so that both can achieve a
completely filled outermost shell.
3. The unsaturated hydrocarbons which contain one or more double bonds are called
4. The general formula of alkynes is ………..
5. A group of organic compounds having similar structures and similar chemical properties in which the successive compounds differ by CH2 group is called a ………..
6. ………. are sweet-smelling substances that are used in making perfumes.

ANSWERS
1. Carbon
2. sharing
3. alkenes
4. CnH2n-2
5. homologous series
6. Esters

  • MCQ Questions for Class 10 Science Carbon and Its Compounds with Answers

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