{"id":12772,"date":"2025-09-23T03:19:46","date_gmt":"2025-09-23T02:19:46","guid":{"rendered":"https:\/\/mcqsadda.com\/?p=12772"},"modified":"2025-10-22T10:24:19","modified_gmt":"2025-10-22T09:24:19","slug":"carbon-and-its-compound-top-100-mcqs-with-answer-and-explanation","status":"publish","type":"post","link":"https:\/\/mcqsadda.com\/index.php\/2025\/09\/23\/carbon-and-its-compound-top-100-mcqs-with-answer-and-explanation\/","title":{"rendered":"Carbon and its compound Top 100 MCQs With Answer and Explanation"},"content":{"rendered":"\n

1. Carbon belongs to which group of the periodic table?<\/mark><\/strong>
A) Group 13
B) Group 14
C) Group 15
D) Group 16
Answer:<\/strong> B) Group 14
Explanation:<\/strong> Carbon is a group 14 element (tetrels) with 4 valence electrons.<\/p>\n\n\n\n

2. The atomic number of carbon is:<\/mark><\/strong>
A) 4
B) 6
C) 8
D) 12
Answer:<\/strong> B) 6
Explanation:<\/strong> Carbon has 6 protons and thus atomic number = 6.<\/p>\n\n\n\n

3. The ability of carbon to form long chains and rings is called:<\/mark><\/strong>
A) Isomerism
B) Catenation
C) Polymerization
D) Hybridization
Answer:<\/strong> B) Catenation
Explanation:<\/strong> Catenation is the property of an element to form bonds with itself.<\/p>\n\n\n\n

4. Which allotrope of carbon is the hardest natural substance?<\/mark><\/strong>
A) Graphite
B) Diamond
C) Fullerene
D) Charcoal
Answer:<\/strong> B) Diamond
Explanation:<\/strong> Diamond is the hardest naturally occurring material due to 3D covalent bonding.<\/p>\n\n\n\n

5. Graphite conducts electricity because:<\/mark><\/strong>
A) It has free protons
B) It has delocalized electrons
C) It contains ions
D) It is metallic
Answer:<\/strong> B) It has delocalized electrons
Explanation:<\/strong> Each carbon in graphite forms 3 bonds; the 4th electron is free to move.<\/p>\n\n\n\n

6. Which of the following is a crystalline allotrope of carbon?<\/mark><\/strong>
A) Coke
B) Lampblack
C) Diamond
D) Charcoal
Answer:<\/strong> C) Diamond
Explanation:<\/strong> Diamond, graphite, and fullerenes are crystalline allotropes.<\/p>\n\n\n\n

7. Buckminsterfullerene (C60) resembles the shape of a:<\/mark><\/strong>
A) Cube
B) Sphere
C) Football
D) Pyramid
Answer:<\/strong> C) Football
Explanation:<\/strong> Fullerene (C60) has a soccer-ball-like structure.<\/p>\n\n\n\n

8. The oxidation state of carbon in CO2 is:<\/mark><\/strong>
A) +2
B) +4
C) -2
D) 0
Answer:<\/strong> B) +4
Explanation:<\/strong> Oxygen is -2, hence carbon = +4.<\/p>\n\n\n\n

9. Which hybridization is present in diamond?<\/mark><\/strong>
A) sp
B) sp\u00b2
C) sp\u00b3
D) dsp\u00b2
Answer:<\/strong> C) sp\u00b3
Explanation:<\/strong> Diamond has tetrahedral geometry with sp\u00b3 hybridization.<\/p>\n\n\n\n

10. Which is the softest form of carbon?<\/mark><\/strong>
A) Diamond
B) Graphite
C) Fullerene
D) Charcoal
Answer:<\/strong> B) Graphite
Explanation:<\/strong> Layers in graphite slide over each other due to weak Van der Waals forces.<\/p>\n\n\n\n

11. Which property makes carbon form a large number of compounds?<\/mark><\/strong>
A) Low ionization energy
B) Catenation and tetravalency
C) High electronegativity
D) Metallic bonding
Answer:<\/strong> B) Catenation and tetravalency
Explanation:<\/strong> Carbon forms strong covalent bonds and long chains.<\/p>\n\n\n\n

12. Which of the following is not an allotrope of carbon?<\/mark><\/strong>
A) Graphite
B) Diamond
C) Fullerene
D) Rust
Answer:<\/strong> D) Rust
Explanation:<\/strong> Rust is hydrated ferric oxide, not a carbon allotrope.<\/p>\n\n\n\n

13. Graphene is a:<\/mark><\/strong>
A) 2D sheet of carbon atoms
B) 3D solid structure
C) Amorphous carbon
D) Compound of carbon and hydrogen
Answer:<\/strong> A) 2D sheet of carbon atoms
Explanation:<\/strong> Graphene is a single layer of carbon atoms in honeycomb structure.<\/p>\n\n\n\n

14. Which allotrope of carbon is used in lead pencils?<\/mark><\/strong>
A) Diamond
B) Graphite
C) Charcoal
D) Fullerene
Answer:<\/strong> B) Graphite
Explanation:<\/strong> Pencil “lead” contains graphite mixed with clay.<\/p>\n\n\n\n

15. The percentage of carbon in diamond is:<\/mark><\/strong>
A) 90%
B) 95%
C) 99%
D) 100%
Answer:<\/strong> D) 100%
Explanation:<\/strong> Diamond is pure crystalline carbon.<\/p>\n\n\n\n

16. In which allotrope of carbon are carbon atoms arranged in tetrahedral units?<\/mark><\/strong>
A) Diamond
B) Graphite
C) Fullerene
D) Coal
Answer:<\/strong> A) Diamond
Explanation:<\/strong> Diamond atoms are tetrahedrally bonded.<\/p>\n\n\n\n

17. Which of the following is amorphous carbon?<\/mark><\/strong>
A) Diamond
B) Graphite
C) Charcoal
D) Fullerene
Answer:<\/strong> C) Charcoal
Explanation:<\/strong> Charcoal lacks definite crystalline structure.<\/p>\n\n\n\n

18. Which property of carbon explains the existence of isomers?<\/mark><\/strong>
A) High electronegativity
B) Catenation
C) Tetravalency
D) Both B and C
Answer:<\/strong> D) Both B and C
Explanation:<\/strong> Long chains and different arrangements cause isomerism.<\/p>\n\n\n\n

19. Which allotrope of carbon is a good lubricant?<\/mark><\/strong>
A) Graphite
B) Diamond
C) Fullerene
D) Coal
Answer:<\/strong> A) Graphite
Explanation:<\/strong> Graphite layers slide easily, used as a dry lubricant.<\/p>\n\n\n\n

20. Which form of carbon is used in making electrodes?<\/mark><\/strong>
A) Diamond
B) Graphite
C) Fullerene
D) Coal
Answer:<\/strong> B) Graphite
Explanation:<\/strong> Graphite conducts electricity, hence used in electrodes.<\/p>\n\n\n\n

21. Dry ice is the solid form of:<\/mark><\/strong>
A) Methane
B) Carbon
C) Carbon dioxide
D) Carbon monoxide
Answer:<\/strong> C) Carbon dioxide
Explanation:<\/strong> Solid CO\u2082 is called dry ice.<\/p>\n\n\n\n

22. Which carbon allotrope is known as the \u201cwonder material\u201d?<\/mark><\/strong>
A) Diamond
B) Graphene
C) Coal
D) Fullerene
Answer:<\/strong> B) Graphene
Explanation:<\/strong> Graphene is super strong, light, and conductive.<\/p>\n\n\n\n

23. The hybridization of carbon in graphite is:<\/mark><\/strong>
A) sp
B) sp\u00b2
C) sp\u00b3
D) sp\u00b3d\u00b2
Answer:<\/strong> B) sp\u00b2
Explanation:<\/strong> Graphite has planar hexagonal sheets with sp\u00b2 bonding.<\/p>\n\n\n\n

24. Which compound of carbon is poisonous and binds with hemoglobin?<\/mark><\/strong>
A) CO\u2082
B) CO
C) CH\u2084
D) C\u2082H\u2082
Answer:<\/strong> B) CO
Explanation:<\/strong> Carbon monoxide binds with hemoglobin to form carboxyhemoglobin.<\/p>\n\n\n\n

25. The main component of biogas is:<\/mark><\/strong>
A) CO\u2082
B) CH\u2084
C) C\u2082H\u2086
D) H\u2082
Answer:<\/strong> B) CH\u2084
Explanation:<\/strong> Methane (CH\u2084) is about 70% of biogas.<\/p>\n\n\n\n

26. The general formula of alkanes is:<\/mark><\/strong>
A) CnH2n
B) CnH2n+2
C) CnH2n\u20132
D) CnHn
Answer:<\/strong> B) CnH2n+2
Explanation:<\/strong> Alkanes are saturated hydrocarbons with single bonds only.<\/p>\n\n\n\n

27. The first member of the alkane series is:<\/mark><\/strong>
A) Methane
B) Ethane
C) Propane
D) Butane
Answer:<\/strong> A) Methane
Explanation:<\/strong> Methane (CH\u2084) is the simplest alkane.<\/p>\n\n\n\n

28. The general formula of alkenes is:<\/mark><\/strong>
A) CnH2n
B) CnH2n+2
C) CnH2n\u20132
D) CnH2n+1
Answer:<\/strong> A) CnH2n
Explanation:<\/strong> Alkenes are unsaturated hydrocarbons with one double bond.<\/p>\n\n\n\n

29. The simplest alkene is:<\/mark><\/strong>
A) Ethene
B) Methene
C) Propene
D) Butene
Answer:<\/strong> A) Ethene
Explanation:<\/strong> \u201cMethene\u201d does not exist, hence ethene (C\u2082H\u2084) is the first alkene.<\/p>\n\n\n\n

30. The general formula of alkynes is:<\/strong><\/mark>
A) CnH2n
B) CnH2n\u20132
C) CnH2n+2
D) CnHn
Answer:<\/strong> B) CnH2n\u20132
Explanation:<\/strong> Alkynes are unsaturated hydrocarbons with one triple bond.<\/p>\n\n\n\n

31. The first member of the alkyne series is:<\/mark><\/strong>
A) Ethyne
B) Methyne
C) Propyne
D) Butyne
Answer:<\/strong> A) Ethyne
Explanation:<\/strong> Methyne is not possible. The first alkyne is ethyne (C\u2082H\u2082).<\/p>\n\n\n\n

32. Which hydrocarbon is called \u201cparaffin\u201d?<\/mark><\/strong>
A) Alkenes
B) Alkynes
C) Alkanes
D) Aromatics
Answer:<\/strong> C) Alkanes
Explanation:<\/strong> Alkanes are chemically less reactive, hence called paraffins (Latin: \u201clittle affinity\u201d).<\/p>\n\n\n\n

33. Which gas is popularly known as \u201cmarsh gas\u201d?<\/mark><\/strong>
A) Ethane
B) Methane
C) Propane
D) Butane
Answer:<\/strong> B) Methane
Explanation:<\/strong> Methane (CH\u2084) is found in marshy areas due to anaerobic decay.<\/p>\n\n\n\n

34. Which of the following hydrocarbons undergo addition reactions?<\/mark><\/strong>
A) Alkanes
B) Alkenes
C) Aromatics
D) All of these
Answer:<\/strong> B) Alkenes
Explanation:<\/strong> Alkenes and alkynes undergo addition due to double\/triple bonds, but alkanes don\u2019t.<\/p>\n\n\n\n

35. The IUPAC name of acetylene is:<\/mark><\/strong>
A) Ethene
B) Ethyne
C) Ethane
D) Propyne
Answer:<\/strong> B) Ethyne
Explanation:<\/strong> Common name acetylene = IUPAC name ethyne (C\u2082H\u2082).<\/p>\n\n\n\n

36. Which of the following is aromatic?<\/mark><\/strong>
A) Benzene
B) Methane
C) Ethene
D) Propyne
Answer:<\/strong> A) Benzene
Explanation:<\/strong> Benzene (C\u2086H\u2086) is the simplest aromatic hydrocarbon.<\/p>\n\n\n\n

37. Which catalyst is used in the hydrogenation of alkenes?<\/mark><\/strong>
A) Ni or Pt
B) Fe
C) Cu
D) Pb
Answer:<\/strong> A) Ni or Pt
Explanation:<\/strong> Hydrogenation requires catalysts like nickel, platinum, or palladium.<\/p>\n\n\n\n

38. The addition of HCl to ethene is an example of:<\/mark><\/strong>
A) Substitution reaction
B) Addition reaction
C) Elimination reaction
D) Polymerization
Answer:<\/strong> B) Addition reaction
Explanation:<\/strong> Alkenes react with HCl in an addition reaction forming chloroethane.<\/p>\n\n\n\n

39. Which is used in oxy-acetylene flame for welding?<\/mark><\/strong>
A) Ethane
B) Ethene
C) Ethyne
D) Methane
Answer:<\/strong> C) Ethyne
Explanation:<\/strong> Ethyne + oxygen burns with a very high temperature (~3000\u00b0C).<\/p>\n\n\n\n

40. Which hydrocarbon undergoes substitution reactions easily?<\/mark><\/strong>
A) Alkanes
B) Alkenes
C) Alkynes
D) Aromatics
Answer:<\/strong> A) Alkanes
Explanation:<\/strong> Alkanes undergo substitution reactions with halogens in presence of sunlight.<\/p>\n\n\n\n

41. The compound benzene (C\u2086H\u2086) was discovered by:<\/mark><\/strong>
A) Kekul\u00e9
B) Faraday
C) Dalton
D) Mendeleev
Answer:<\/strong> B) Faraday
Explanation:<\/strong> Michael Faraday first isolated benzene in 1825.<\/p>\n\n\n\n

42. The structure of benzene was proposed by:<\/mark><\/strong>
A) Kekul\u00e9
B) Dalton
C) Arrhenius
D) Avogadro
Answer:<\/strong> A) Kekul\u00e9
Explanation:<\/strong> August Kekul\u00e9 proposed the cyclic structure with alternating double bonds.<\/p>\n\n\n\n

43. Which of the following hydrocarbons decolorizes bromine water?<\/mark><\/strong>
A) Alkanes
B) Alkenes
C) Aromatics
D) All of these
Answer:<\/strong> B) Alkenes
Explanation:<\/strong> Alkenes\/alkynes decolorize bromine water due to addition reaction.<\/p>\n\n\n\n

44. Which of the following hydrocarbons shows isomerism?<\/mark><\/strong>
A) Methane
B) Ethane
C) Propane
D) Butane
Answer:<\/strong> D) Butane
Explanation:<\/strong> Butane has two structural isomers: n-butane and isobutane.<\/p>\n\n\n\n

45. Toluene is also called:<\/mark><\/strong>
A) Methylbenzene
B) Ethylbenzene
C) Phenylmethane
D) Benzyl alcohol
Answer:<\/strong> A) Methylbenzene
Explanation:<\/strong> Toluene = C\u2086H\u2085\u2013CH\u2083.<\/p>\n\n\n\n

46. Which hydrocarbon is known as \u201cacetylene\u201d?<\/mark><\/strong>
A) Ethene
B) Ethyne
C) Propene
D) Butyne
Answer:<\/strong> B) Ethyne
Explanation:<\/strong> Ethyne is the IUPAC name for acetylene.<\/p>\n\n\n\n

47. Which gas is called \u201cilluminating gas\u201d?<\/mark><\/strong>
A) Hydrogen
B) Acetylene
C) Methane
D) Ethane
Answer:<\/strong> B) Acetylene
Explanation:<\/strong> Ethyne burns with a bright luminous flame, used in lamps earlier.<\/p>\n\n\n\n

48. Benzene undergoes:<\/mark><\/strong>
A) Addition reaction
B) Substitution reaction
C) Elimination reaction
D) None of these
Answer:<\/strong> B) Substitution reaction
Explanation:<\/strong> Benzene resists addition; it undergoes electrophilic substitution to retain aromaticity.<\/p>\n\n\n\n

49. Which is an example of an alkyne?<\/mark><\/strong>
A) CH\u2084
B) C\u2082H\u2082
C) C\u2082H\u2084
D) C\u2086H\u2086
Answer:<\/strong> B) C\u2082H\u2082
Explanation:<\/strong> Ethyne is the simplest alkyne.<\/p>\n\n\n\n

50. Which hydrocarbon is used as LPG fuel?<\/mark><\/strong>
A) Methane
B) Ethane
C) Propane and Butane
D) Ethyne
Answer:<\/strong> C) Propane and Butane
Explanation:<\/strong> LPG mainly contains propane (C\u2083H\u2088) and butane (C\u2084H\u2081\u2080).<\/p>\n\n\n\n

51. A functional group in chemistry is:<\/mark><\/strong>
A) A part of compound which is inert
B) The group responsible for characteristic reactions
C) The longest carbon chain
D) The side chain of hydrocarbons
Answer:<\/strong> B) The group responsible for characteristic reactions
Explanation:<\/strong> Functional groups determine the physical and chemical properties of compounds.<\/p>\n\n\n\n

52. The functional group of alcohols is:<\/mark><\/strong>
A) \u2013CHO
B) \u2013COOH
C) \u2013OH
D) \u2013CO\u2013
Answer:<\/strong> C) \u2013OH
Explanation:<\/strong> Alcohols contain the hydroxyl group (\u2013OH).<\/p>\n\n\n\n

53. The functional group of aldehydes is:<\/mark><\/strong>
A) \u2013CHO
B) \u2013OH
C) \u2013COOH
D) \u2013NH\u2082
Answer:<\/strong> A) \u2013CHO
Explanation:<\/strong> Aldehydes contain the carbonyl group attached to a hydrogen.<\/p>\n\n\n\n

54. The functional group of carboxylic acids is:<\/mark><\/strong>
A) \u2013CHO
B) \u2013OH
C) \u2013COOH
D) \u2013CO\u2013
Answer:<\/strong> C) \u2013COOH
Explanation:<\/strong> Carboxyl group (\u2013COOH) characterizes acids like acetic acid.<\/p>\n\n\n\n

55. The functional group of ketones is:<\/mark><\/strong>
A) \u2013CHO
B) \u2013OH
C) \u2013CO\u2013
D) \u2013NH\u2082
Answer:<\/strong> C) \u2013CO\u2013
Explanation:<\/strong> Ketones contain a carbonyl group bonded to two carbons.<\/p>\n\n\n\n

56. The functional group of amines is:<\/mark><\/strong>
A) \u2013NH\u2082
B) \u2013NO\u2082
C) \u2013CN
D) \u2013OH
Answer:<\/strong> A) \u2013NH\u2082
Explanation:<\/strong> Amines contain amino group (\u2013NH\u2082).<\/p>\n\n\n\n

57. Ethanol is commonly known as:<\/mark><\/strong>
A) Methanol
B) Wood spirit
C) Grain alcohol
D) Glycerol
Answer:<\/strong> C) Grain alcohol
Explanation:<\/strong> Ethanol is obtained by fermentation of sugars.<\/p>\n\n\n\n

58. Methanol is also called:<\/mark><\/strong>
A) Wood alcohol
B) Rectified spirit
C) Ethyl alcohol
D) Methylated spirit
Answer:<\/strong> A) Wood alcohol
Explanation:<\/strong> Methanol is obtained by destructive distillation of wood.<\/p>\n\n\n\n

59. Which alcohol is poisonous and causes blindness?<\/mark><\/strong>
A) Ethanol
B) Methanol
C) Propanol
D) Butanol
Answer:<\/strong> B) Methanol
Explanation:<\/strong> Methanol is highly toxic, causing blindness and death.<\/p>\n\n\n\n

60. The formula of ethanol is:<\/mark><\/strong>
A) CH\u2083OH
B) C\u2082H\u2085OH
C) C\u2083H\u2087OH
D) C\u2084H\u2089OH
Answer:<\/strong> B) C\u2082H\u2085OH
Explanation:<\/strong> Ethanol = CH\u2083\u2013CH\u2082\u2013OH.<\/p>\n\n\n\n

61. Vinegar is a dilute solution of:<\/mark><\/strong>
A) Methanol
B) Ethanol
C) Acetic acid
D) Formic acid
Answer:<\/strong> C) Acetic acid
Explanation:<\/strong> Vinegar is ~5\u20138% aqueous acetic acid (CH\u2083COOH).<\/p>\n\n\n\n

62. The molecular formula of acetic acid is:<\/mark><\/strong>
A) CH\u2083OH
B) C\u2082H\u2085OH
C) CH\u2083COOH
D) HCOOH
Answer:<\/strong> C) CH\u2083COOH
Explanation:<\/strong> Acetic acid contains the carboxyl group.<\/p>\n\n\n\n

63. The simplest carboxylic acid is:<\/mark><\/strong>
A) Formic acid
B) Acetic acid
C) Propionic acid
D) Oxalic acid
Answer:<\/strong> A) Formic acid
Explanation:<\/strong> Formic acid (HCOOH) is the simplest carboxylic acid.<\/p>\n\n\n\n

64. Formaldehyde has the formula:<\/mark><\/strong>
A) HCHO
B) CH\u2083CHO
C) CH\u2083COOH
D) HCOOH
Answer:<\/strong> A) HCHO
Explanation:<\/strong> Formaldehyde is the simplest aldehyde.<\/p>\n\n\n\n

65. Acetaldehyde has the formula:<\/mark><\/strong>
A) HCHO
B) CH\u2083CHO
C) CH\u2083COOH
D) C\u2082H\u2085OH
Answer:<\/strong> B) CH\u2083CHO
Explanation:<\/strong> Acetaldehyde belongs to aldehydes (\u2013CHO).<\/p>\n\n\n\n

66. The IUPAC name of formaldehyde is:<\/mark><\/strong>
A) Methanal
B) Ethanal
C) Methanol
D) Formic acid
Answer:<\/strong> A) Methanal
Explanation:<\/strong> Aldehydes are named as \u201c\u2013anal.\u201d HCHO = methanal.<\/p>\n\n\n\n

67. The IUPAC name of acetaldehyde is:<\/mark><\/strong>
A) Methanal
B) Ethanal
C) Propanal
D) Butanal
Answer:<\/strong> B) Ethanal
Explanation:<\/strong> CH\u2083\u2013CHO is ethanal.<\/p>\n\n\n\n

68. The IUPAC name of acetic acid is:<\/mark><\/strong>
A) Methanoic acid
B) Ethanoic acid
C) Propanoic acid
D) Butanoic acid
Answer:<\/strong> B) Ethanoic acid
Explanation:<\/strong> CH\u2083COOH is ethanoic acid.<\/p>\n\n\n\n

69. Which of the following is used as an antiseptic in low concentration and as a disinfectant in high concentration?<\/mark><\/strong>
A) Formaldehyde
B) Ethanol
C) Phenol
D) Methanol
Answer:<\/strong> C) Phenol
Explanation:<\/strong> Phenol is antiseptic at 0.1% but disinfectant at higher concentration.<\/p>\n\n\n\n

70. The reaction of alcohol with sodium metal produces:<\/mark><\/strong>
A) Hydrogen gas
B) Oxygen gas
C) Carbon dioxide
D) Nitrogen gas
Answer:<\/strong> A) Hydrogen gas
Explanation:<\/strong> 2R\u2013OH + 2Na \u2192 2R\u2013ONa + H\u2082\u2191.<\/p>\n\n\n\n

71. Oxidation of ethanol with alkaline KMnO\u2084 produces:<\/mark><\/strong>
A) Methanol
B) Acetaldehyde
C) Acetic acid
D) Propanol
Answer:<\/strong> C) Acetic acid
Explanation:<\/strong> Ethanol is oxidized stepwise to acetaldehyde, then acetic acid.<\/p>\n\n\n\n

72. Which reagent is used to distinguish between aldehydes and ketones?<\/mark><\/strong>
A) Bromine water
B) Tollen\u2019s reagent
C) Sodium hydroxide
D) Hydrochloric acid
Answer:<\/strong> B) Tollen\u2019s reagent
Explanation:<\/strong> Aldehydes give silver mirror test with Tollen\u2019s reagent; ketones do not.<\/p>\n\n\n\n

73. The oxidation of formaldehyde produces:<\/mark><\/strong>
A) Methanol
B) Formic acid
C) Acetic acid
D) Ethanol
Answer:<\/strong> B) Formic acid
Explanation:<\/strong> HCHO \u2192 HCOOH on oxidation.<\/p>\n\n\n\n

74. Which functional group is present in soaps?<\/mark><\/strong>
A) \u2013CHO
B) \u2013OH
C) \u2013COOH (salt)
D) \u2013NH\u2082
Answer:<\/strong> C) \u2013COOH (salt)
Explanation:<\/strong> Soaps are sodium\/potassium salts of long-chain carboxylic acids.<\/p>\n\n\n\n

75. Esterification is the reaction between:<\/mark><\/strong>
A) Alcohol and ketone
B) Alcohol and aldehyde
C) Alcohol and carboxylic acid
D) Aldehyde and acid
Answer:<\/strong> C) Alcohol and carboxylic acid
Explanation:<\/strong> Alcohol + Carboxylic acid \u2192 Ester + Water (with conc. H\u2082SO\u2084).<\/p>\n\n\n\n

76. The chemical name of baking soda is:<\/mark><\/strong>
A) Sodium carbonate
B) Sodium bicarbonate
C) Calcium carbonate
D) Sodium hydroxide
Answer:<\/strong> B) Sodium bicarbonate
Explanation:<\/strong> Baking soda = NaHCO\u2083.<\/p>\n\n\n\n

77. The chemical name of washing soda is:<\/mark><\/strong>
A) Sodium carbonate
B) Sodium bicarbonate
C) Sodium chloride
D) Calcium carbonate
Answer:<\/strong> A) Sodium carbonate
Explanation:<\/strong> Washing soda = Na\u2082CO\u2083\u00b710H\u2082O.<\/p>\n\n\n\n

78. Which gas is produced when vinegar reacts with baking soda?<\/mark><\/strong>
A) O\u2082
B) H\u2082
C) CO\u2082
D) N\u2082
Answer:<\/strong> C) CO\u2082
Explanation:<\/strong> CH\u2083COOH + NaHCO\u2083 \u2192 CO\u2082 + H\u2082O + CH\u2083COONa.<\/p>\n\n\n\n

79. Hard water does not lather easily with soap because it contains:<\/mark><\/strong>
A) Na\u207a and K\u207a ions
B) Ca\u00b2\u207a and Mg\u00b2\u207a ions
C) Fe\u00b3\u207a ions
D) Cl\u207b ions
Answer:<\/strong> B) Ca\u00b2\u207a and Mg\u00b2\u207a ions
Explanation:<\/strong> These form insoluble salts with soap.<\/p>\n\n\n\n

80. Detergents are effective even in hard water because they are:<\/mark><\/strong>
A) Sodium salts of fatty acids
B) Ammonium or sulphonate salts
C) Simple hydrocarbons
D) Aldehydes
Answer:<\/strong> B) Ammonium or sulphonate salts
Explanation:<\/strong> Detergents do not form scum with Ca\u00b2\u207a and Mg\u00b2\u207a.<\/p>\n\n\n\n

81. The process of converting vegetable oils into fats is called:<\/mark><\/strong>
A) Esterification
B) Hydrogenation
C) Polymerization
D) Saponification
Answer:<\/strong> B) Hydrogenation
Explanation:<\/strong> Addition of hydrogen to unsaturated oils using Ni catalyst makes them solid.<\/p>\n\n\n\n

82. The process of making soap from oils\/fats is called:<\/mark><\/strong>
A) Esterification
B) Hydrogenation
C) Saponification
D) Cracking
Answer:<\/strong> C) Saponification
Explanation:<\/strong> Oils + NaOH \u2192 Soap + Glycerol.<\/p>\n\n\n\n

83. Which polymer is known as \u201cpolythene\u201d?<\/mark><\/strong>
A) Polyvinyl chloride
B) Polyethylene
C) Polystyrene
D) Polypropylene
Answer:<\/strong> B) Polyethylene
Explanation:<\/strong> Polythene is made from polymerization of ethene.<\/p>\n\n\n\n

84. Teflon is a polymer of:<\/mark><\/strong>
A) Ethene
B) Tetrafluoroethene
C) Propene
D) Styrene
Answer:<\/strong> B) Tetrafluoroethene
Explanation:<\/strong> PTFE (Teflon) is made from CF\u2082=CF\u2082 monomers.<\/p>\n\n\n\n

85. PVC stands for:<\/mark><\/strong>
A) Polyvinyl chloride
B) Polyvinyl carbonate
C) Polyvinyl carbazole
D) Polyvinyl cyanide
Answer:<\/strong> A) Polyvinyl chloride
Explanation:<\/strong> PVC = (\u2013CH\u2082\u2013CHCl\u2013)n.<\/p>\n\n\n\n

86. Bakelite is a polymer of:<\/mark><\/strong>
A) Phenol and methanal
B) Ethene and propene
C) Styrene and butadiene
D) Vinyl chloride and acrylonitrile
Answer:<\/strong> A) Phenol and methanal
Explanation:<\/strong> Bakelite is a condensation polymer used in electrical goods.<\/p>\n\n\n\n

87. Nylon is a:<\/mark><\/strong>
A) Natural polymer
B) Synthetic polymer
C) Semi-synthetic polymer
D) Inorganic polymer
Answer:<\/strong> B) Synthetic polymer
Explanation:<\/strong> Nylon is prepared from diamines and dicarboxylic acids.<\/p>\n\n\n\n

88. Rayon is obtained from:<\/mark><\/strong>
A) Cotton
B) Petroleum
C) Wood pulp
D) Coal tar
Answer:<\/strong> C) Wood pulp
Explanation:<\/strong> Rayon is a regenerated cellulose fiber.<\/p>\n\n\n\n

89. Which is called artificial silk?<\/mark><\/strong>
A) Nylon
B) Rayon
C) Polyester
D) Terylene
Answer:<\/strong> B) Rayon
Explanation:<\/strong> Rayon has silky texture, hence called artificial silk.<\/p>\n\n\n\n

90. Which polymer is used in making non-stick cookware?<\/mark><\/strong>
A) PVC
B) Polystyrene
C) Teflon
D) Nylon
Answer:<\/strong> C) Teflon
Explanation:<\/strong> PTFE (Teflon) is heat-resistant and non-stick.<\/p>\n\n\n\n

91. Which of the following is a natural polymer?<\/mark><\/strong>
A) Starch
B) PVC
C) Teflon
D) Polystyrene
Answer:<\/strong> A) Starch
Explanation:<\/strong> Starch, cellulose, proteins are natural polymers.<\/p>\n\n\n\n

92. Which of the following is a biodegradable polymer?<\/mark><\/strong>
A) Nylon
B) Polyester
C) Cellulose
D) Polythene
Answer:<\/strong> C) Cellulose
Explanation:<\/strong> Natural polymers are biodegradable, unlike synthetic plastics.<\/p>\n\n\n\n

93. Which gas is commonly used in the ripening of fruits?<\/mark><\/strong>
A) Ethane
B) Ethene
C) Ethyne
D) Methane
Answer:<\/strong> B) Ethene
Explanation:<\/strong> Ethene acts as a plant hormone for fruit ripening.<\/p>\n\n\n\n

94. Which carbon compound is used as an anaesthetic?<\/mark><\/strong>
A) Ethanol
B) Chloroform
C) Methane
D) Acetone
Answer:<\/strong> B) Chloroform
Explanation:<\/strong> Chloroform (CHCl\u2083) was used historically as an anaesthetic.<\/p>\n\n\n\n

95. Which carbon compound is used as a solvent in nail polish removers?<\/mark><\/strong>
A) Ethanol
B) Methanol
C) Acetone
D) Formaldehyde
Answer:<\/strong> C) Acetone
Explanation:<\/strong> Acetone (CH\u2083COCH\u2083) is a common organic solvent.<\/p>\n\n\n\n

96. Which polymer is used in making bottles and carry bags?<\/mark><\/strong>
A) PVC
B) Polythene
C) Nylon
D) Teflon
Answer:<\/strong> B) Polythene
Explanation:<\/strong> High\/low-density polyethylene is used in bags and containers.<\/p>\n\n\n\n

97. Which compound is called \u201cantifreeze\u201d?<\/mark><\/strong>
A) Methanol
B) Ethanol
C) Ethylene glycol
D) Acetic acid
Answer:<\/strong> C) Ethylene glycol
Explanation:<\/strong> Ethylene glycol is added to car radiators to prevent freezing.<\/p>\n\n\n\n

98. Which compound is commonly used as a preservative in pickles?<\/mark><\/strong>
A) Acetic acid
B) Formaldehyde
C) Methanol
D) Ethanol
Answer:<\/strong> A) Acetic acid
Explanation:<\/strong> Vinegar (acetic acid) prevents microbial growth in pickles.<\/p>\n\n\n\n

99. The compound used in preparation of sweeteners like aspartame is derived from:<\/mark><\/strong>
A) Amino acids
B) Hydrocarbons
C) Aldehydes
D) Alcohols
Answer:<\/strong> A) Amino acids
Explanation:<\/strong> Aspartame is an artificial sweetener made from aspartic acid and phenylalanine.<\/p>\n\n\n\n

100. Which of the following is a thermosetting plastic?<\/mark><\/strong>
A) Polythene
B) PVC
C) Bakelite
D) Nylon
Answer:<\/strong> C) Bakelite
Explanation:<\/strong> Thermosetting plastics harden permanently on heating (Bakelite, melamine).<\/p>\n","protected":false},"excerpt":{"rendered":"

1. Carbon belongs to which group of the periodic table?A) Group 13B) Group 14C) Group 15D) Group 16Answer: B) Group 14Explanation: Carbon is a group 14 element (tetrels) with 4 valence electrons. 2. The atomic number of carbon is:A) 4B) 6C) 8D) 12Answer: B) 6Explanation: Carbon has 6 protons and thus atomic number = 6.<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[15992,16004,15994,15999,16000,16002,10973,16003,15993,15995,16007,15886,15892,15876,15898,15901,15887,15899,15879,15883,15996,16006,15998,15997,4029,15897,5649,5652,5623,15927,16001,16005,15900,15896,15894],"class_list":{"0":"post-12772","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-chemistry","7":"tag-alcohols","8":"tag-aldehydes-and-ketones","9":"tag-alkanes","10":"tag-alkenes","11":"tag-alkynes","12":"tag-aromatic-compounds","13":"tag-carbon-and-its-compound-top-100-mcqs-with-answer-and-explanation","14":"tag-carbon-bonding","15":"tag-carbon-compounds","16":"tag-carboxylic-acids","17":"tag-chemical-reactions","18":"tag-chemistry-formulas","19":"tag-chemistry-learning","20":"tag-chemistry-mcqs","21":"tag-chemistry-preparation-material","22":"tag-chemistry-questions-and-answers","23":"tag-chemistry-quiz","24":"tag-chemistry-revision","25":"tag-chemistry-study-material","26":"tag-competitive-exam-chemistry","27":"tag-esters","28":"tag-functional-groups","29":"tag-hydrocarbons","30":"tag-isomerism","31":"tag-mcqs-adda","32":"tag-mcqs-for-chemistry-exam","33":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","34":"tag-mcqs-for-pc-psi-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-examsin-kannada","35":"tag-mcqs-for-sda-fda-pdo-vao-banking-kas-ias-ssc-gd-ssc-chsl-ssc-cgl-for-all-compitative-exams","36":"tag-molecular-structure","37":"tag-organic-chemistry","38":"tag-organic-compounds","39":"tag-psc-chemistry-mcqs","40":"tag-ssc-chemistry-mcqs","41":"tag-upsc-chemistry-mcqs"},"_links":{"self":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12772","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/comments?post=12772"}],"version-history":[{"count":4,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12772\/revisions"}],"predecessor-version":[{"id":12937,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/posts\/12772\/revisions\/12937"}],"wp:attachment":[{"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/media?parent=12772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/categories?post=12772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mcqsadda.com\/index.php\/wp-json\/wp\/v2\/tags?post=12772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}