Chapter-wise MCQ Questions

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

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

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

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

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

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

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

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

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

  1. Carbon
  2. Argon
  3. Nitrogen
  4. Hydrogen
Answer-5

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

  1. Acetylene
  2. Butane
  3. Propane
  4. Decane
Answer-6

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

  1. Single covalent bond
  2. Double covalent bond
  3. Triple covalent bond
  4. Electrovalent bond
Answer-7

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

  1. the food is not cooked completely
  2. the fuel is not burning completely.
  3. the fuel is wet.
  4. the fuel is burning completely.
Answer-8

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

  1. There are four electrons in the outermost shell of carbon
  2. It requires large amount of energy to form C4+ or C4?
  3. It shares its valence electrons to complete its octet.
  4. All the above
Answer-9

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. Ethane
  2. Propane
  3. Carbon dioxide
  4. Methane
Answer-10

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

  1. ketones
  2. Alcohols
  3. Carboxylic acids
  4. Acids
Answer-11

Question-12. 100% pure ethanol is called

  1. Absolute alcohol
  2. Acetic acid
  3. Denatured alcohol
  4. Power alcohol
Answer-12

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

  1. A clear and homogeneous solution is formed
  2. The acid formed a separate layer on the top of water
  3. Water formed a separate layer on the top of the acid
  4. A pink and clear solution is formed
Answer-13

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

  1. A gas evolves
  2. A solid settles at the bottom
  3. The mixture becomes warm
  4. The colour of the mixture
Answer-14

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

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

Question-16. The number of isomers of C6H14 are

  1. 6
  2. 4
  3. 5
  4. 7
Answer-16

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

  1. Vinegar
  2. Tomato
  3. Kerosene
  4. Lemon juice
Answer-17

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

  1. C2H2
  2. C2H4
  3. C3H4
  4. C2H6
Answer-18

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

  1. C3H7OH
  2. CH3COOH
  3. HCOOH
  4. NaCl(aq)
Answer-19

Question-20. 100% pure ethanol is called

  1. Rectified spirit
  2. Absolute alcohol
  3. Denatured alcohol
  4. Power alcohol
Answer-20

Question-21. 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 clear and homogeneous solution is formed
  4. A pink and clear solution is formed
Answer-21

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

  1. all single bonds
  2. one double bond
  3. one triple bond
  4. none of the above
Answer-22

Question-23. A functional group mainly determines the

  1. Physical properties
  2. Chemical properties
  3. Both
  4. None of these
Answer-23

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

  1. Three
  2. Four
  3. Five
  4. Six
Answer-24

Question-25. Artificial flavour for orange is obtained from

  1. amyl acetate
  2. isoamyl valerate
  3. methyl butyrate
  4. octyl acetate
Answer-25

Question-26. Atomic number of Cl

  1. 16
  2. 12
  3. 17
  4. 18
Answer-26

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

  1. carboxylic acid
  2. alcohol
  3. ketone
  4. aldehyde
Answer-27

Question-28. C3H8 belongs to the homologous series of

  1. Alkynes
  2. Alkenes
  3. Alkanes
  4. Cyclo alkanes
Answer-28

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

  1. Only carbon monoxide
  2. Carbon monoxide in traces and carbon dioxide
  3. Only Carbon dioxide
  4. Coal
Answer-29

Question-30. Carboxylic acid containing one carbon atom is

  1. Formic acid
  2. Acetic acid
  3. Citric acid
  4. Vinegar
Answer-30

Question-31. Catenation is maximum in

  1. Carbon
  2. Oxygen
  3. Sulphur
  4. Phosphorous
Answer-31

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

  1. Same, structural isomerism
  2. Different, structural isomerism
  3. Same, monomeric structures
  4. Different, monomeric structures
Answer-32

Question-33. Cooking oils contain

  1. Saturated healthy acids
  2. Saturated acids
  3. Unsaturated healthy acids
  4. Unsaturated fatty acids
Answer-33

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

  1. Bromine water
  2. Chlorine water
  3. I2
  4. HCl
Answer-34

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

  1. 6 covalent bonds
  2. 7 covalent bonds.
  3. 8 covalent bonds.
  4. 9 covalent bonds.
Answer-35

Question-36. Ethanol on oxidation gives

  1. Ethane
  2. Formalin
  3. Ethanoic acid
  4. Methane
Answer-36

Question-37. Ethanol reacts with Na metal to form

  1. CH3ONa + H2
  2. C2H5ONa + H2
  3. CH3COONa + H2
  4. CH3C00H + H2O
Answer-37

Question-38. From where can we get ethanol?

  1. Grapes
  2. Beet root
  3. Sugarcane
  4. Orange
Answer-38

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

  1. presence of hexagonal rings
  2. presence of ions
  3. presence van der waal forces
  4. presence of free electron
Answer-39

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

  1. 1
  2. 4
  3. 2
  4. 3
Answer-40

Question-41. Hydrophobic end of micelles attack on

  1. Water
  2. Oil
  3. Acid
  4. Base
Answer-41

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

  1. 3
  2. 6
  3. 4
  4. 5
Answer-42

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

  1. High melting point
  2. High boiling point
  3. Conduction of electricity in solid state
  4. Conduction of electricity in molten state
Answer-43

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

  1. Ethanone
  2. methanone
  3. Propanone
  4. Butanone
Answer-44

Question-45. Methane is

  1. Unsaturated compound
  2. nitrogen compound
  3. Saturated compound
  4. Ionic compound
Answer-45

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

  1. Chloromethane, substitution
  2. Dichloromethane, addition
  3. Trichloromethane, elimination
  4. Tetra chloro methane, combustion
Answer-46

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

  1. 6,6,8
  2. 6,6,6
  3. 8,6,8
  4. 6,7,8
Answer-47

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

  1. 2
  2. 4
  3. 6
  4. 8
Answer-48

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

  1. two
  2. four
  3. one
  4. three.
Answer-49

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

  1. Calcium Carbonate
  2. Calcium Hydroxide
  3. Calcium bicarbonate
  4. Calcium Acetate
Answer-50

Question-51. Organic compounds are generally

  1. covalent in nature
  2. ionic in nature
  3. insoluble in organic solvents
  4. soluble in water
Answer-51

Question-52. Organic compounds will always contains

  1. carbon
  2. hydrogen
  3. nitrogen
  4. sulphur
Answer-52

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

  1. Graphite is non-volatile, so, it can-not be used for lubricating
  2. Graphite is used for making carbon electrodes or graphite electrodes in dry cells and electric arcs.
  3. Diamonds can be made artificially by subjecting pure carbon to very high pressure and temperature.
  4. Diamond ?dies? are used for drawing thin wires like the tungsten filament of an electric bul(
Answer-53

Question-54. Rectified spirit is

  1. 50% ethanol
  2. 80% ethanol
  3. 95% ethanol
  4. 40 to 50% ethanol
Answer-54

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

  1. Fullerene
  2. Diamond
  3. Graphite
  4. Carbon ball
Answer-55

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

  1. It is observed that :
  2. A gas evolves
  3. A solid settles at the bottom
  4. The mixture becomes warmd) The colour of the mixture
Answer-56

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

  1. 14
  2. 16
  3. 24
  4. 28
Answer-57

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

  1. CH3 and 12u
  2. CH2 and 12u
  3. CH3 and 14u
  4. CH2 and 14u
Answer-58

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

  1. Ethyne
  2. Ethene
  3. Propyne
  4. Methane
Answer-59

Question-60. The general formula of cycloalkanes is

  1. CnH2n + 2
  2. CnH2n ? 2
  3. CnH2n ? 1
  4. CnH2n
Answer-60

Question-61. The isomeric pair is

  1. Ethane and propane
  2. Propane and butane
  3. Ethane and ethane
  4. Butane and 2-methylpropane
Answer-61

Question-62. The isomers always possess similar

  1. chemical properties
  2. molecular formula
  3. physical properties
  4. structural formula
Answer-62

Question-63. The next higher homologue of propane is

  1. C2H6
  2. C3H4
  3. C4H10
  4. C5H12
Answer-63

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

  1. 10
  2. 8
  3. 6
  4. 4
Answer-64

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

  1. 15
  2. 16
  3. 17
  4. 18
Answer-65

Question-66. The number of isomers of C6H14 are

  1. 4
  2. 5
  3. 6
  4. 7
Answer-66

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

  1. Rose
  2. Burning Plastic
  3. Vinegar
  4. Kerosene
Answer-67

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

  1. Tomato
  2. Kerosene
  3. Vinegar
  4. Lemon juice
Answer-68

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

  1. Aldehyde
  2. Ketone
  3. Carboxylic acids
  4. Alcohol
Answer-69

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

  1. Catenation
  2. Isomerisation
  3. Superposition
  4. Halogenation
Answer-70

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

  1. Butanol
  2. Butanoate
  3. Propanol
  4. Propanoate
Answer-71

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

  1. CH3COOH
  2. C3H7OH
  3. HCOOH
  4. NaCl(aq)
Answer-72

Question-73. Which is denatured spirit?

  1. ethanol only
  2. ethanol and methanol (50%)
  3. ethanol and methanol (5%)
  4. methanol only
Answer-73

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

  1. They differ in physical properties
  2. They differ in chemical properties
  3. They have same molecular formula
  4. They have same structural formula
Answer-74

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

  1. CH4 and C2H4
  2. CH3OH and CH3Cl
  3. C2H5OH and C3H7OH
  4. CH3OCH3 and C2H5OH
Answer-75

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

  1. C2H4
  2. C3H4
  3. C3H8
  4. C4H10
Answer-76

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

  1. Argon
  2. Fluorine
  3. Nitrogen
  4. Ozone
Answer-77

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

  1. C2H2
  2. C2H4
  3. C2H6
  4. C6H6
Answer-78

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

  1. Charcoal
  2. Coal
  3. Graphite
  4. Lamp black
Answer-79

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

  1. Carbon atoms are held together by single covalent bonds.
  2. Electrons move freely through the structure.
  3. Layers of atoms slide easily over each other.
  4. Carbon atoms conduct electricity in the molten state.
Answer-80

Question-81. Which of the following is ethanol?

  1. CH3CHO
  2. CH3COOH
  3. CH3CH2
  4. CH3COOCH3
Answer-81

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

  1. They possess varying chemical properties.
  2. Their physical properties vary in regular and predictable manner.
  3. Their formulae fit the general molecular formul
  4. Adjacent members differ by one carbon and two hydrogen atoms.
Answer-82

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

  1. Methane
  2. Water
  3. Carbon dioxide
  4. Nitrogen trichloride
Answer-83

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

  1. Chloro propene
  2. 1-Chloroprop-3-ene
  3. 3-Chloroprop-1-ene
  4. 3-Chloropropylene
Answer-84

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

  1. C2H6O
  2. C5H10O
  3. C4H10O
  4. C7H16O
Answer-85

Question-86. Which of the following represents cyclohexane

  1. C6H14
  2. C6H12
  3. C6H10
  4. C6H6
Answer-86

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

  1. CH3CH(CH3)CH2CH2OH
  2. (CH3)3CCH2OH
  3. CH3CH2CH2CH2OH
  4. CH3CH2CH(OH)CH2
Answer-87

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

  1. They have same crystal structure
  2. They have same degree of hardness
  3. They have same electrical conductivity
  4. They have same chemical properties.
Answer-88

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

  1. All its ions are arranged in a giant three dimensional lattice.
  2. A large amount of energy is needed to break down the lattice structure.
  3. It conducts electricity in the molten state.
  4. It dissolves in water but is more soluble in organic solvents.
Answer-89



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