Carbon and its Compounds MCQs with Answers

Question-1. Which of the following statements is correct?

1. Ethane and ethene belong to the same homologous series.
2. Propene contains three hydrogen atoms per molecule.
3. Chloroethane contains two carbon atoms per molecule.
4. Most organic compounds are ionic compounds.

Question-2. Which of the following statements is not correct?

1. Two consecutive members of a homologous series differ by a ?CH3 group.
2. The members of a homologous series can be represented by one general formul
3. Different members of a homologous series have similar chemical properties.
4. A common functional group is present in different members of a homologous series.

Question-3. Which of the following statements regarding graphite is not correct?

1. Graphite is manufactured by heating coke at 3000oC
2. Graphite is a bad conductor of heat and electricity.
3. Graphite possesses a metallic lustre and soapy touch.
4. Graphite is a black and soft crystalline substance

Question-4. Which of the given can be used for the denaturation of ethyl alcohol?

1. Pyridines
2. Copper sulphate
3. All of these
4. Methyl alcohol

Question-5. Which of the given is a noble gas?

1. Argon
2. Nitrogen
3. Hydrogen
4. Carbon

Question-6. Which one of the given is an unsaturated hydrocarbon?

1. Butane
2. Propane
3. Decane
4. Acetylene

Question-7. Which type of bond is present between carbon-carbon atoms in acetylene?

1. Double covalent bond
2. Triple covalent bond
3. Electrovalent bond
4. Single covalent bond

Question-8. While cooking, if the bottom of the vessel is getting blackened on the outside, it means that

1. the fuel is not burning completely.
2. the fuel is wet.
3. the fuel is burning completely.
4. the food is not cooked completely

Question-9. Why does carbon form compounds mainly by covalent bonding?

1. It requires large amount of energy to form C4+ or C4?
2. It shares its valence electrons to complete its octet.
3. All the above
4. There are four electrons in the outermost shell of carbon

Question-10. ….............is widely used as a fuel and is a major component of bio-gas and CNG. It is also one of the simplest compounds formed by carbon.

1. Propane
2. Carbon dioxide
3. Methane
4. Ethane

Question-11. - C=O represents the functional group:

1. Alcohols
2. Carboxylic acids
3. Acids
4. ketones

Question-12. 100% pure ethanol is called

1. Acetic acid
2. Denatured alcohol
3. Power alcohol
4. Absolute alcohol

Question-13. 2ml of acetic acid is added to 5ml of water and was shaken up for 1minute, it was noticed that:

1. The acid formed a separate layer on the top of water
2. Water formed a separate layer on the top of the acid
3. A pink and clear solution is formed
4. A clear and homogeneous solution is formed

Question-14. Sodium carbonate solution is added to dilute ethanoic aci It is observed that :

1. A solid settles at the bottom
2. The mixture becomes warm
3. The colour of the mixture
4. A gas evolves

Question-15. The number of covalent bonds in C5H12 is:

1. 15
2. 17
3. 18
4. 16

Question-16. The number of isomers of C6H14 are

1. 4
2. 5
3. 7
4. 6

Question-17. The odour of acetic acid resembles that of:

1. Tomato
2. Kerosene
3. Lemon juice
4. Vinegar

Question-18. Which among the following contains triple bond:

1. C2H4
2. C3H4
3. C2H6
4. C2H2

Question-19. Which amongst the following does not conduct electricity:

1. CH3COOH
2. HCOOH
3. NaCl(aq)
4. C3H7OH

Question-20. 100% pure ethanol is called

1. Absolute alcohol
2. Denatured alcohol
3. Power alcohol
4. Rectified spirit

Question-21. 2ml of acetic acid is added to 5ml of water and was shaken up for 1minute, it was noticed that:

1. Water formed a separate layer on the top of the acid
2. A clear and homogeneous solution is formed
3. A pink and clear solution is formed
4. The acid formed a separate layer on the top of water

Question-22. A compound with the molecular formula C2H2 must contain

1. one double bond
2. one triple bond
3. none of the above
4. all single bonds

Question-23. A functional group mainly determines the

1. Chemical properties
2. Both
3. None of these
4. Physical properties

Question-24. A hydrocarbon should have a minimum of how many carbon atoms to show isomerism?

1. Four
2. Five
3. Six
4. Three

Question-25. Artificial flavour for orange is obtained from

1. isoamyl valerate
2. methyl butyrate
3. octyl acetate
4. amyl acetate

Question-26. Atomic number of Cl

1. 12
2. 17
3. 18
4. 16

Question-27. Butanone is a four carbon compound with functional group:

1. alcohol
2. ketone
3. aldehyde
4. carboxylic acid

Question-28. C3H8 belongs to the homologous series of

1. Alkenes
2. Alkanes
3. Cyclo alkanes
4. Alkynes

Question-29. Carbon Exists In The Atmosphere In the form of:

1. Carbon monoxide in traces and carbon dioxide
2. Only Carbon dioxide
3. Coal
4. Only carbon monoxide

Question-30. Carboxylic acid containing one carbon atom is

1. Acetic acid
2. Citric acid
3. Vinegar
4. Formic acid

Question-31. Catenation is maximum in

1. Oxygen
2. Sulphur
3. Phosphorous
4. Carbon

Question-32. Compounds with…..............molecular formula with different structures called …......

1. Different, structural isomerism
2. Same, monomeric structures
3. Different, monomeric structures
4. Same, structural isomerism

Question-33. Cooking oils contain

1. Saturated acids
2. Unsaturated healthy acids
3. Unsaturated fatty acids
4. Saturated healthy acids

Question-34. Ethane and ethene can be distinguished by using

1. Chlorine water
2. I2
3. HCl
4. Bromine water

Question-35. Ethane, with the molecular formula C2H6 has

1. 7 covalent bonds.
2. 8 covalent bonds.
3. 9 covalent bonds.
4. 6 covalent bonds

Question-36. Ethanol on oxidation gives

1. Formalin
2. Ethanoic acid
3. Methane
4. Ethane

Question-37. Ethanol reacts with Na metal to form

1. C2H5ONa + H2
2. CH3COONa + H2
3. CH3C00H + H2O
4. CH3ONa + H2

Question-38. From where can we get ethanol?

1. Beet root
2. Sugarcane
3. Orange
4. Grapes

Question-39. Graphite is good conductor of electricity due to the

1. presence of ions
2. presence van der waal forces
3. presence of free electron
4. presence of hexagonal rings

Question-40. How many structural isomers are possible for pentane (C5H12)?

1. 4
2. 2
3. 3
4. 1

Question-41. Hydrophobic end of micelles attack on

1. Oil
2. Acid
3. Base
4. Water

Question-42. In C6H14 the number of possible isomers is

1. 6
2. 4
3. 5
4. 3

Question-43. Ionic compounds have does not show below property

1. High boiling point
2. Conduction of electricity in solid state
3. Conduction of electricity in molten state
4. High melting point

Question-44. IUPAC name of first member of homologous series of ketones is

1. methanone
2. Propanone
3. Butanone
4. Ethanone

Question-45. Methane is

1. nitrogen compound
2. Saturated compound
3. Ionic compound
4. Unsaturated compound

Question-46. Methane reacts with one mole of Chlorine in presence of sunlight to give….................The reaction is called

1. Dichloromethane, addition
2. Trichloromethane, elimination
3. Tetra chloro methane, combustion
4. Chloromethane, substitution

Question-47. No of protons, electrons and neutrons respectively in carbon atom is

1. 6,6,6
2. 8,6,8
3. 6,7,8
4. 6,6,8

Question-48. Number of electrons shared between carboncarbon atoms in ethene is

1. 4
2. 6
3. 8
4. 2

Question-49. Number of free electron(s) in each carbon atom in graphite is/are

1. four
2. one
3. three.
4. two

Question-50. On adding NaHCO3 to acetic acid, a gas is evolved which turns lime water milky due to the formation of

1. Calcium Hydroxide
2. Calcium bicarbonate
3. Calcium Acetate
4. Calcium Carbonate

Question-51. Organic compounds are generally

1. ionic in nature
2. insoluble in organic solvents
3. soluble in water
4. covalent in nature

Question-52. Organic compounds will always contains

1. hydrogen
2. nitrogen
3. sulphur
4. carbon

Question-53. Read The Following Sentences Carefully, And Choose The Incorrect One:

1. Graphite is used for making carbon electrodes or graphite electrodes in dry cells and electric arcs.
2. Diamonds can be made artificially by subjecting pure carbon to very high pressure and temperature.
3. Diamond ?dies? are used for drawing thin wires like the tungsten filament of an electric bul(
4. Graphite is non-volatile, so, it can-not be used for lubricating

Question-54. Rectified spirit is

1. 80% ethanol
2. 95% ethanol
3. 40 to 50% ethanol
4. 50% ethanol

Question-55. Rigid Three dimensional structure of carbon allotrope forming 4 bond with each carbon

1. Diamond
2. Graphite
3. Carbon ball
4. Fullerene

Question-56. Sodium carbonate solution is added to dilute ethanoic aci

1. A gas evolves
2. A solid settles at the bottom
3. The mixture becomes warmd) The colour of the mixture
4. It is observed that :

Question-57. Subsequent members of homologous series differ by how many atomic mass units?

1. 16
2. 24
3. 28
4. 14

Question-58. The difference in the molecular formula and molecular mass of CH4 and C2H6 is

1. CH2 and 12u
2. CH3 and 14u
3. CH2 and 14u
4. CH3 and 12u

Question-59. The first member of alkyne homologous series is

1. Ethene
2. Propyne
3. Methane
4. Ethyne

Question-60. The general formula of cycloalkanes is

1. CnH2n ? 2
2. CnH2n ? 1
3. CnH2n
4. CnH2n + 2

Question-61. The isomeric pair is

1. Propane and butane
2. Ethane and ethane
3. Butane and 2-methylpropane
4. Ethane and propane

Question-62. The isomers always possess similar

1. molecular formula
2. physical properties
3. structural formula
4. chemical properties

Question-63. The next higher homologue of propane is

1. C3H4
2. C4H10
3. C5H12
4. C2H6

Question-64. The number of C-H bonds in ethane(C2H6) molecule are:

1. 8
2. 6
3. 4
4. 10

Question-65. The number of covalent bonds in C5H12 is:

1. 16
2. 17
3. 18
4. 15

Question-66. The number of isomers of C6H14 are

1. 5
2. 6
3. 7
4. 4

Question-67. The odour of acetic acid resembles that of

1. Burning Plastic
2. Vinegar
3. Kerosene
4. Rose

Question-68. The odour of acetic acid resembles that of

1. Kerosene
2. Vinegar
3. Lemon juice
4. Tomato

Question-69. The organic compounds having functional group are known as:

1. Ketone
2. Carboxylic acids
3. Alcohol
4. Aldehyde

Question-70. The property of self-linkage among identical atoms to form long chain compounds is known as:

1. Isomerisation
2. Superposition
3. Halogenation
4. Catenation

Question-71. Three carbon chain with ketone functional group would name in following

1. Butanoate
2. Propanol
3. Propanoate
4. Butanol

Question-72. Which amongst the following does not conduct electricity

1. C3H7OH
2. HCOOH
3. NaCl(aq)
4. CH3COOH

Question-73. Which is denatured spirit?

1. ethanol and methanol (50%)
2. ethanol and methanol (5%)
3. methanol only
4. ethanol only

Question-74. Which is not correct for isomers of a compound?

1. They differ in chemical properties
2. They have same molecular formula
3. They have same structural formula
4. They differ in physical properties

Question-75. Which of the following are members of the same homologous series

1. CH3OH and CH3Cl
2. C2H5OH and C3H7OH
3. CH3OCH3 and C2H5OH
4. CH4 and C2H4

Question-76. Which of the following compounds has a triple bond?

1. C3H4
2. C3H8
3. C4H10
4. C2H4

Question-77. Which of the following exists as a simple triatomic molecule?

1. Fluorine
2. Nitrogen
3. Ozone
4. Argon

Question-78. Which of the following has shortest carboncarbon bond length?

1. C2H4
2. C2H6
3. C6H6
4. C2H2

Question-79. Which of the following is a crystalline form of carbon ?

1. Coal
2. Graphite
3. Lamp black
4. Charcoal

Question-80. Which of the following is correct about the structure of diamond?

1. Electrons move freely through the structure.
2. Layers of atoms slide easily over each other.
3. Carbon atoms conduct electricity in the molten state.
4. Carbon atoms are held together by single covalent bonds.

Question-81. Which of the following is ethanol?

1. CH3COOH
2. CH3CH2
3. CH3COOCH3
4. CH3CHO

Question-82. Which of the following is not a characteristic of members of a homologous series?

1. Their physical properties vary in regular and predictable manner.
2. Their formulae fit the general molecular formul
3. Adjacent members differ by one carbon and two hydrogen atoms.
4. They possess varying chemical properties.

Question-83. Which of the following molecules has all its atoms joined together by double covalent bonds?

1. Water
2. Carbon dioxide
3. Nitrogen trichloride
4. Methane

Question-84. Which of the following name is wrong for CH2=CHCH2Cl ?

1. 1-Chloroprop-3-ene
2. 3-Chloroprop-1-ene
3. 3-Chloropropylene
4. Chloro propene

Question-85. Which of the following organic compounds does not have the same chemical properties as methanol?

1. C5H10O
2. C4H10O
3. C7H16O
4. C2H6O

Question-86. Which of the following represents cyclohexane

1. C6H12
2. C6H10
3. C6H6
4. C6H14

Question-87. Which of the following represents neopentyl alcohol ?

1. (CH3)3CCH2OH
2. CH3CH2CH2CH2OH
3. CH3CH2CH(OH)CH2
4. CH3CH(CH3)CH2CH2OH

Question-88. Which of the following statements about diamond and graphite is true?

1. They have same degree of hardness
2. They have same electrical conductivity
3. They have same chemical properties.
4. They have same crystal structure

Question-89. Which of the following statements is correct about a substance that has a giant covalent structure?

1. A large amount of energy is needed to break down the lattice structure.
2. It conducts electricity in the molten state.
3. It dissolves in water but is more soluble in organic solvents.
4. All its ions are arranged in a giant three dimensional lattice.