Chapter-wise MCQ Questions

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  1. All the above
  2. There are four electrons in the outermost shell of carbon
  3. It requires large amount of energy to form C4+ or C4?
  4. It shares its valence electrons to complete its octet.
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. Methane
  2. Ethane
  3. Propane
  4. Carbon dioxide
Answer-10

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

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

Question-12. 100% pure ethanol is called

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

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

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

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

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

Question-16. The number of isomers of C6H14 are

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

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

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

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

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

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

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

Question-20. 100% pure ethanol is called

  1. Power alcohol
  2. Rectified spirit
  3. Absolute alcohol
  4. Denatured 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. A pink and clear 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 clear and homogeneous solution is formed
Answer-21

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

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

Question-23. A functional group mainly determines the

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

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

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

Question-25. Artificial flavour for orange is obtained from

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

Question-26. Atomic number of Cl

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

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

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

Question-28. C3H8 belongs to the homologous series of

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

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

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

Question-30. Carboxylic acid containing one carbon atom is

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

Question-31. Catenation is maximum in

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

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

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

Question-33. Cooking oils contain

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

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

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

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

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

Question-36. Ethanol on oxidation gives

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

Question-37. Ethanol reacts with Na metal to form

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

Question-38. From where can we get ethanol?

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

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

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

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

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

Question-41. Hydrophobic end of micelles attack on

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

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

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

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

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

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

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

Question-45. Methane is

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

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

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

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

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

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

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

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

  1. three.
  2. two
  3. four
  4. one
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 Acetate
  2. Calcium Carbonate
  3. Calcium Hydroxide
  4. Calcium bicarbonate
Answer-50

Question-51. Organic compounds are generally

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

Question-52. Organic compounds will always contains

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

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

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

Question-54. Rectified spirit is

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

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

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

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

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

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

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

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

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

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

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

Question-60. The general formula of cycloalkanes is

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

Question-61. The isomeric pair is

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

Question-62. The isomers always possess similar

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

Question-63. The next higher homologue of propane is

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

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

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

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

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

Question-66. The number of isomers of C6H14 are

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-73. Which is denatured spirit?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Question-81. Which of the following is ethanol?

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

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

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

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

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

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

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

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

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

Question-86. Which of the following represents cyclohexane

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

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

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

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

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

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

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



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