Wednesday, November 2, 2011

CBSE | NCERT Ch - Carbon and its compounds F.A. - III Class 10

CARBON AND ITS COMPOUNDS F.A. - III-2011-12 TIME: 40 min.  Max. Marks. -40.

1. Name the compound formed on heating ethanol at 443 K with excess of conc. H2SO4.1

2. What happens when a small piece of sodium is dropped into ethanol?1

3. Write the chemical equation for the decarboxylation reaction of ethanoic acid.1
4. Give an example of esterification reaction.1

5. Name the product obtained when ethanol is oxidized by either chromic anhydride oralkaline Potassium per manganate. 1

6. Write the chemical equation representing the preparation reaction of ethanol from ethene.1

7. Name the two elements which are present both in CNG and petroleum.                     2

8. Draw the electronic dot structure of ethane molecule (C2H6).                                    2

9. Write the IUPAC name of the next homologue of CH3OHCH 2 CH3                         2

10. Define homologous series of organic compounds. Mention any two characteristics of homologous series.              2

11. Describe a chemical test to distinguish between ethanol and ethanoic acid.               2

12. Give the name of functional groups. (i) –CHO (ii) –C = 0                                          2

13. Why does carbon form compounds mainly by covalent bonding?                               2

14. Give a chemical test to distinguish ethanol from ethanoic acid.                                  2

15. Allotropy is a property shown by which class: Substances, elements, compounds or Mixtures? Give one 
example of allotropy.                        2

16. How may be the following be obtained from ethanol? Express giving chemical equations.

(i) Ethyl ethanoate (ii) Sodium ethoxide.                                                                          2

17. Describe with chemical equation how ethanoic acid may be obtained from:

(i) Ethanol (ii) methanol                                                                                                     2

18. Explain the cleansing action of soap.                                                                            3

19. Distinguish between esterification and saponification reactions of organic compounds. 3

20. Explain the structure of graphite in terms of bonding and give one property based on this Structure.3

21. Name the organic acid present in vinegar. Write a chemical equation which represents the Commercial method for the preparation of this acid from methanol.      3

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