Carbon And It's Compounds MCQs with Answer

Carbon And It's Compounds
Class:10|Chapter:4

Multiple Choice Questions

1. Which of the following is the purest form of carbon
a. Charcoal
b. Coal
c. Diamond
d. Graphite

2. When methane is burnt in excess of air, the products of combustion are
a. C and H₂O
b. CO and H₂O
C. CO₂ and H₂
d. CO₂ and H₂O

3. Chlorine reacts with saturated hydrocarbons at room temperature in the
a. Absence of sunlight
b. Presence of sunlight
c. Presence of water
d. Presence of hydrochloric acid

4. Which of the following does not belong to the same homologous series?
(a) CH₄
(b) C₂H₆
(c) C₃H₈
(d) C₄H₈

5. 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)

6. Detergents can lather well in
(a) Soft water
(b) Hard water
(c) River water
(d) Any one of the above

7. Which of the following is / are detergents
(a) Sodium alkyl sulphonate
(b) Sodium chloride
(c) Sodium sulphonate
(d) Sodium stearate

8. The fermentation reactions are carried out in temperature range of
(a) 20-30°C
(b) 30-40°C
(c) 40-50°C
(d) 50-60°C

9. When vanaspati oil reacts with hydrogen then it convert into vanaspati ghee. In this process catalyst used is
(a) Fe
(b) Mo
(c) V
(d) Ni

10. Pentane has the molecular formula C₅H₁₂. It has
(a) 5 covalent bonds
(b) 12 covalent bonds
(c) 16 covalent bonds
(d) 17 covalent bonds

11. C₃H₈ belongs to the homologous series of
(a) Alkynes
(b) Alkenes
(c) Alkanes
(d) Cyclo alkanes

12. The number of isomers of pentane is
(a) 2
(b) 3
(c) 4
(d) 5

13. Which of the following will undergo addition reactions?
(a) CH₄
(b) C₃H₈
(C) C₂H₆
(d) C₂H₄

14. Ethanol on complete oxidation gives
(a) acetic acid/ethanoic acid
(b) CO₂ and water
(c) ethanal
(d) acetone/ethanone

15. Which of the following will give a pleasant smell of ester when heated with ethanol and a small quantity of sulphuric acid?
(a) CH₃COOH
(b) CH₃CH₂OH
(c) CH₃OH
(d) CH₃CHO

16. Name the functional group present in CH₃COCH₃
(a) Alcohol
(b) Carboxylic acid
(c) Ketone
(d) Aldehyde

17. Why does carbon form compounds mainly by covalent bonding?
(a) There are four electrons in the outermost shell of carbon.
(b) It requires large amount of energy to form C₄⁺ or C₄^-.
(c) It shares its valence electrons to complete its octet.
(d) All of the above

18. Addition reactions are undergone by
(a) saturated hydrocarbons (alkanes)
(b) only alkenes
(c) only alkynes
(d) both alkenes and alkynes

19. Identify ‘A’ in the following reaction:
CH₃COOH + Na₂CO₃ → A + CO₂ + H₂O
(a) CH₃COONa
(b) CH₂(Na)COOH
(c) NaOH
(d) NaHCO₃

20. Which of the following belongs to homologous series of alkynes?
C₆H₆, C₂H₆, C₂H₄, C₃H₄
(a) C₆H₆
(b) C₂H₄
(C) C₂H₆
(d) C₃H₄

21. A hydrocarbon has four carbon atoms. Give its molecular formula if it is an alkene
(a) C₄H₁₀
(b) C₄H₈
(C) C₄H₆
(d) C₄H₄

22. Give the IUPAC name of CH₃COOC₂H₅
(a) Ethyl ethanoic acid
(b) Butanoate
(c) Ethyl ethanoate
(d) Etyl methyl carboxylic acid

23. The first member of the alkyne homologous series is
(a) propyne
(b) ethyne
(c) methane
(d) ethene

24. In diamond, each carbon atom is bonded to four other carbon atoms to form
(a) a hexagonal array
(b) a rigid three-dimensional structure
(c) a structure in the shape of a football
(d) a structure of a ring

25. A soap molecule has a
(a) hydrophobic head and hydrophobic tail
(b) hydrophobic head and hydrophilic tail
(c) hydrophilic head and hydrophilic tail
(d) hydrophilic head and hydrophobic tail

26. The isomeric pair is
(a) Ethane and propane
(b) Propane and butane
(c) Ethane and ethane
(d) Butane and 2-methylpropane

27. Which of the given is used to oxidise ethanol to ethanoic acid?
(a) Alkaline KMnO₄
(b) Conc. H₂SO₄
(c) Acidified K₂Cr₂O₇
(d) All of these

28. Which is denatured spirit?
(a) Ethanol only
(b) Ethanol and methanol (50%)
(c) Ethanol and methanol (5%)
(d) Methanol only

29. Tertiary butanol gets oxidised with oxidising agents like alkaline KMNO₄ to
(a) Isobutane
(b) Ter-butyl alcohol
(c) Secondary-propyl alcohol
(d) All of these

30. The substance not responsible for the hardness of water is
(a) Sodium nitrate
(b) Calcium hydrogen carbonate
(c) Calcium carbonate
(d)Magnesium carbonate

31. The by product of soap is
(a) Isoprene
(b) Glycerol
(c) Butene
(d) Ethylene glycol

32. Covalent compounds
(a) Have high melting and boiling poin
(b) Are mostly soluble in water
(c) Are formed between atoms of metals and non-metals
(d) Are formed by the sharing of electrons in the bonding atoms

33. Vinegar is a solution of
(a) 30% – 40% acetic acid in alcohol
(b) 5% – 8% acetic acid in alcohol
(c) 5% – 8% acetic acid in water
(d) 15% -20% acetic acid in water

34. Which of the given can be used for the denaturation of ethyl alcohol?
(a) Methyl alcohol
(b) Pyridines
(c) Copper sulphate
(d) All of these

35. Soaps are formed by saponification of
(a) Alcohols
(b) Glycosides
(c) Simple esters
(d) Carboxylic acids

36. Carbon exists in the atmosphere in the form of
(a) Only carbon monoxide
(b) Carbon monoxide in traces and carbon dioxide
(c) Only carbon dioxide
(d) Coal

37. Which of the following statements are usually correct for carbon compounds? These
(a) Are good conductors of electricity.
(b) Are poor conductors of electricity.
(c) Have strong forces of attraction between their molecules.
(d) Do not have strong forces of attraction between their molecules.
(a) (A) & (C)
(b) (B) & (C)
(c) (A) & (D)
(d) (B) & (D)

38. A molecule of ammonia (NH₃) has
(a) Only single bonds
(b) Only double bonds
(c) Only triple bonds
(d) Two double bonds and one single bond

39. Buckminsterfullerene is an allotropic form of
(a) Phosphorus
(b) Sulphur
(c) Carbon
(d) Tin

40. Which of the given is not an aliphatic hydrocarbon?
(a) Ethene
(b) Ethane
(c) Propyne
(d) Benzene

41. In the given reaction, alkaline KMnO₄ acts as:

(a) Reducing agent
(b) Oxidising agent
(c) Catalyst
(d) Dehydrating agent

42. Oils on treating with hydrogen in the presence of palladium or nickel catalyst form fats. This is an example of
(a) Addition reaction
(b) Substitution reaction
(c) Displacement reaction
(d) Oxidation reaction

43. In which of the given compounds -OH is the functional group?
(a) Butanone
(b) Butanol
(c) Butanoic
(d) Butanal

44. The soap molecule has a - Hydrophilic head and a
(a) hydrophobic tail
(b) Hydrophobic head and a hydrophilic tail
(c) Hydrophobic head and a hydrophobic tail
(d) Hydrophilic head and a hydrophilic tail

45. Identify the unsaturated compounds from the following:
(a) Propane
(b) Propene
(c) Propyne
(d) Chloropropane
(a) (A) & (B)
(b) (B) & (D)
(c) (C) & (D)
(d) (B) & (C)

46. The earth’s crust has only ………… carbon in the form of minerals
(a) 0.02%
(b) 0.002%
(c) 0.001%
(d) 0.01%

47. Ionic compounds have does not show below property
(a) High melting
(b) High boiling point
(c) Conduction of electricity in solid state
(d) Conduction of electricity in molten state

48. Compound which made of carbon called
(a) Inorganic compound
(b) Organic compound
(c) Salts
(d) Acids

49. Two electron in outer shell. Name the noble gas of element
(a) Hydrogen
(b) Helium
(c) Carbon
(d) Argon

50. Only 6 electron present in outermost L shell .name the element
(a) Hydrogen
(b) Helium
(c) Carbon
(d) Oxygen

51. Carbon compounds with single bond called
(a) Unsaturated compound
(b) Carbon compounds
(c) Saturated compounds
(d) Ionic compounds

52. Name of the molecule having formula C₃H₈
(a) Butane
(b) Butane
(c) Propane
(d) Propene

53. name the compound CH₃OH
(a) Methanol
(b) Ethanol
(c) Ethanoic acid
(d) Methanoic acid

54. General formula of alkyne
(a) C_nH_2n
(b) C_nH_2n+2
(c) C_nH_2n-2
(d) C_nH₂

55. Three carbon chain with ketone functional group would name in following.
(a) Butanol
(b) Butanoate
(c) Propanol
(d) Propanoate

Answer:

1-c	2-d	3-b	4-d	5-b
6-d	7-a	8-b	9-d	10-c
11-c	12-b	13-d	14-b	15-a
16-c	17-d	18-d	19-a	20-d
21-b	22-c	23-b	24-b	25-d
26-d	27-d	28-c	29-b	30-a
31-b	32-d	33-c	34-d	35-c
36-c	37-d	38-a	39-c	40-d
41-b	42-a	43-b	44-a	45-d
46-a	47-c	48-b	49-b	50-d
51-c	52-d	53-a	54-c	55-d