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CBSE Class 10 worksheet 2024 : Science : carbon and its compounds

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Class: 10 Subject: Chemistry Worksheet: CARBON AND ITS COMPOUNDS. 1. Define catenation. 2. The formulae of four organic compounds are given below: 3. a) Explain why carbon forms covalent bond? Give two reasons for carbon forming a large number of compounds. b) Explain the formation of ammonia molecule. c) Why -CHO group cannot be present in the middle of the carbon atom chain. 4. (a) Write molecular and structural formulae of an organic compound having two carbon atoms with a Carboxylic acid as a functional group. (b) also write the number and type of bonds involved in the structure of the above written compound in question (a). 5. You are given balls and stick model of six carbon atoms and fourteen hydrogen atoms and sufficient number of sticks. In how many ways one can join the models of six carbon atoms and fourteen hydrogen atoms to form different molecules of C6H14. 6. Draw the structural formulae of all the possible isomers of the compound with the molecular formula C3H6O and also give their electron dot structures. 7. Which of the following is not observed in a homologous series? Give reason for your choice. a) Change in chemical properties b) Difference in -CH2 and 14u molecular mass c) Gradation in physical properties d) Same functional group 8. Give a test that can be used to confirm the presence of carbon in a compound. With a valency of 4, how is carbon able to attain noble gas configuration in its compounds? 9. The number of carbon compounds is more than those formed by all other elements put together. Justify the statement by giving two reasons. 10. An alkane has molecular weight 86. Write its molecular formula. What will be its physical state. 11. (a). What is a homologous series of carbon compounds? (b). Write the molecular formula of second and third member of homologous series whose first member is methane. 12. Write the molecular formula of third and fourth member of homologous series whose first member is ethyne. 13. Write the name and equation for the reactions, (a) Conversion of alkene to alkane. (b) Conversion of ethanol to alkene. (c) Conversion of ethanol to acid 14. Why are most carbon compounds poor conductors of electricity? 15. Write the name and structure of a saturated compound in which the carbon atoms are arranged in a ring. Give the number of single bonds present in this compound.

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