chemistry

CLASS 10TH CHEMISTRYOFCARBONCOMPOUNDS BITS

 1. Percentage of carbon in the earth crust is ________

2. The occurrence of same element in two or more different forms is known as ______

3. Important allotropic forms of carbon are __________

4. The density of Diamond is _____________

5. The refractive index of diamond is __________

6. ______________is used as glass cutter.

7. In diamond carbon atoms are in ______________arrangement.

8. The C-C bond length in diamond is ___________

9. The C-C bond angle in diamond is ________________

10. The allotropy of carbon used as lubricant is _____________

11. The density of graphite is _______________

12. Graphite contains carbon atoms in ______________rings.

13. In graphite the C-C bond length is __________

14. In graphite the C-C bond angle is _________________

15. Two successive graphite layers are separated by ___________________

16. C60 contains ________pentagonal rings and _______hexagonal rings of carbon.

17. C60 is a _________________like structure.

18. In C60 the average bond length is _________

19. The poisonous gas mainly found in exhaust fumes of industry and automobiles is __

20. Carbon dioxide is present in air to the extent of about ________by volume.

21. CO2 dissolves in water and gives ________

22. ___________is used as fire extinguisher.

23. Solid carbon dioxide is called ___________

24. The phenomenon in which atoms of same element join together to form long chains is known as

______________

25. Compounds having same molecular formula but different structures are called ________and the

phenomenon is called as ___________

26. The oldest coal is called _______________

27. Anthracite consist ___________carbon.

28. Bituminous coal consists of ____________carbon.

29. Lignite consists of _____________carbon.

30. The compounds containing exclusively carbon and hydrogen are known as ______

31. Example of aromatic hydrocarbon is __________

32. Saturated hydrocarbons are also known as _____________

33. General formula of alkanes is ________________

34. If one hydrogen is removed from alkane it is called ___________group.

35. Alkanes undergo _______________reactions.

36. Formula for chloroform is _______________

37. L.P.G consists of ____________________

38. The unsaturated hydrocarbons having at least one C = C are known as ____________

39. The general formula of alkenes is ____________

40. Alkenes are also known as ______________

41. Alkenes undergo ______________reactions.

42. Ethylene in liquid state undergoes polymerization to give ____________

43. Ethylene mixed with air is used as_________________

44. The unsaturated hydrocarbons consisting C = C are known as __________

45. The general formula of alkynes is _________

46. Common name of ethyne is ______________

47. _______________is used for artificial ripening of fruits.

48. The gas used in welding is __________________

49. The presence of alcoholic functional group is tested by addition of _________metal

50. –COOR is called ___________________

ANSWERS

1) 0.3%

2) Allotropy

3) Diamond and Graphite

4) 3.51 gm/cc

5) 2.41

6) Diamond

7) Tetrahedral

8) 1.54A0

9) 1090 28’

10) Graphite

11) 2.25gm/cc

12) Hexagonal

13) 1.42A0

14) 1200

15) 3.35A0

16) 12, 20

17) Foot ball

18) 1.4A0

19) Co

20) 0.03%

21) Carbonic acid

22) CO2

23) Dry ice

24) Catenation

25) Isomers , Isomerism

26) Anthracite

27) 95%

28) 82%

29) 72%

30) Hydrocarbons

31) Benzene

32) Paraffins

33) CnH2n + 2

34) Alkyl

35) Substitutiion

36) CHCl3

37) Butane (C4H10)

38) Alkene

39) CnH2n

40) Olefins

41) Addition

42) Polythene

43) Anaesthetic

44) Alkynes

45) CnH2n - 2

46) Acetylene

47) Acetylene

48) Acetylene

49) Sodium

50) Ester group