MCQOPTIONS
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MCQOPTIONS
This section includes 200 Mcqs, each offering curated multiple-choice questions to sharpen your Organic Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
The reaction of Acyl chlorides with alcohols and phenols will give |
| A. | esters |
| B. | ketones |
| C. | aldehydes |
| D. | haloalkanes |
| Answer» B. ketones | |
| 52. |
SO₂ left at the end of the contact process should not be escaped as it can cause |
| A. | acid rain |
| B. | toxic pollution |
| C. | smog |
| D. | all of above |
| Answer» E. | |
| 53. |
Alkalis turn Universal indicators |
| A. | blue |
| B. | red |
| C. | green |
| D. | yellow |
| Answer» B. red | |
| 54. |
Soda water (H₂CO₃(aq)) has a pH of |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 55. |
Acidic oxides neutralize |
| A. | bases |
| B. | alkalis |
| C. | salt solutions |
| D. | both a and b |
| Answer» E. | |
| 56. |
Acid rain has a pH |
| A. | well below 3 |
| B. | 3 |
| C. | 4 |
| D. | well above 4 |
| Answer» D. well above 4 | |
| 57. |
What is true about phenol and carboxylic acids? |
| A. | they do not react |
| B. | they make acyl chloride |
| C. | they make phenyl ester |
| D. | they make phenyl ethers |
| Answer» B. they make acyl chloride | |
| 58. |
For the synthesis of carboxylic acid, the intermediate product needed is |
| A. | Acyl chloride |
| B. | aryls |
| C. | benzene |
| D. | carboxylic acid |
| Answer» B. aryls | |
| 59. |
Hydroxonium ions (H₃O+) |
| A. | can only exist in water |
| B. | are highly ionic |
| C. | are highly covalent |
| D. | both a and b |
| Answer» E. | |
| 60. |
A pH of 7 is of |
| A. | sugar solution |
| B. | salt solution |
| C. | weak acids and bases |
| D. | both a and b |
| Answer» E. | |
| 61. |
H₂CO₃ is formula of |
| A. | Hydrogen carbonate (s) |
| B. | Carbonic acetate |
| C. | Carbonic acid |
| D. | Hydro citric acid |
| Answer» D. Hydro citric acid | |
| 62. |
One of the four oxides that is acidic is |
| A. | Na₂O |
| B. | MgO |
| C. | SiO₂ |
| D. | P₄O₁₀ |
| Answer» E. | |
| 63. |
For chemical facial peel in clinics the acid used is called |
| A. | ethanoic acid |
| B. | trichloroethanoic acid |
| C. | dichloric acid |
| D. | Methanoic acid |
| Answer» C. dichloric acid | |
| 64. |
Blood has an approximate pH of |
| A. | 3 to 4 |
| B. | 7 to 8 |
| C. | 10 to 11 |
| D. | 13 to 14 |
| Answer» C. 10 to 11 | |
| 65. |
Non-metal oxides include |
| A. | SO₂ |
| B. | CO₂ |
| C. | P₂O₅ |
| D. | all of these |
| Answer» E. | |
| 66. |
The color of the indicator is solely dependent upon concentration of |
| A. | H⁺ ion |
| B. | OH⁻ ion |
| C. | concentration of solute in the solution |
| D. | concentration of solvent in the solution |
| Answer» B. OH⁻ ion | |
| 67. |
When there is a link between product and reactant with a transfer of proton that pair is called |
| A. | conjugate pair |
| B. | proton pair |
| C. | acid pair |
| D. | base pair |
| Answer» B. proton pair | |
| 68. |
The conversion of sulfur dioxide (SO₂) to sulfur trioxide (SO₃) is basically |
| A. | reversible reaction |
| B. | irreversible reaction |
| C. | dynamic reaction |
| D. | static reaction |
| Answer» B. irreversible reaction | |
| 69. |
Washing soda is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | basic |
| Answer» C. neutral | |
| 70. |
Consider equation P₂O₅ + H₂O → HPO₃. moles of products produced after balancing equation are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 71. |
Tartaric acid is found in |
| A. | grapes |
| B. | apples |
| C. | lemons |
| D. | oranges |
| Answer» B. apples | |
| 72. |
In neutralization reactions, for data logging |
| A. | biosensors should be used |
| B. | gas syringe shall be used |
| C. | conductivity meters shall be used |
| D. | heat sensors should be used |
| Answer» D. heat sensors should be used | |
| 73. |
Amphoteric oxides |
| A. | are only acidic oxides |
| B. | are only basic oxides |
| C. | are both acidic and basic oxides |
| D. | are a form of neutral oxides |
| Answer» D. are a form of neutral oxides | |
| 74. |
Bases which partially dissociate to some extent in a solution are known as |
| A. | strong acids |
| B. | weak acids |
| C. | strong bases |
| D. | weak bases |
| Answer» E. | |
| 75. |
In the contact process, a pressure used is just above |
| A. | 100kPa |
| B. | 450kPa |
| C. | 330kPa |
| D. | 900kPa |
| Answer» B. 450kPa | |
| 76. |
Sugar (CnH₂ mOm) is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | salty |
| Answer» D. salty | |
| 77. |
Less corrosive acid is |
| A. | H₂CO₃ |
| B. | H₂SO₄ |
| C. | HNO₃ |
| D. | HCl |
| Answer» B. H₂SO₄ | |
| 78. |
What are products of given reaction? CO₂ + H₂O → |
| A. | CO |
| B. | H₃O |
| C. | H₂CO₃ |
| D. | CO₂ + OH- |
| Answer» D. CO₂ + OH- | |
| 79. |
Mg + H₂SO₄ → |
| A. | MgSO₄ + H₂O |
| B. | MgSO₄ + H₂ |
| C. | MgO + H₂ |
| D. | MgO + H₂ + SO₂ |
| Answer» C. MgO + H₂ | |
| 80. |
Stronger acid, the |
| A. | less the hydrogen ions be |
| B. | the more the hydrogen ions be |
| C. | the more the covalence be |
| D. | the more the hydroxyl ions |
| Answer» C. the more the covalence be | |
| 81. |
Rain water has a pH of |
| A. | 1 |
| B. | 3 |
| C. | 5 |
| D. | 7 |
| Answer» D. 7 | |
| 82. |
PH values has a range of |
| A. | 1 to 7 |
| B. | 0 to 10 |
| C. | 1 to 14 |
| D. | 0 to 14 |
| Answer» E. | |
| 83. |
Ka is called |
| A. | acid dissociation constant |
| B. | base dissociation constant |
| C. | Avogadro constant |
| D. | salt dissociation constant |
| Answer» B. base dissociation constant | |
| 84. |
The position of equilibrium will be left if the value of Ka is |
| A. | high |
| B. | low |
| C. | same |
| D. | constant |
| Answer» C. same | |
| 85. |
Value of Ka can be calculated by determining |
| A. | concentration of acid only |
| B. | pH of solution only |
| C. | concentration of water molecules |
| D. | concentration of acid and pH of solution |
| Answer» E. | |
| 86. |
Al₂O₃ + NaOH + H₂O → |
| A. | NaClH₃O₄ (s) |
| B. | NaAl(OH)₄ (aq) |
| C. | NaAl(OH)₄ (s) |
| D. | NaClH₃O₄ (aq) |
| Answer» C. NaAl(OH)₄ (s) | |
| 87. |
OH- ions are produced by |
| A. | alkalis |
| B. | acids |
| C. | water |
| D. | none of the alkalis and acids |
| Answer» B. acids | |
| 88. |
Water has a pH of |
| A. | 5 |
| B. | 7 |
| C. | 9 |
| D. | 11 |
| Answer» C. 9 | |
| 89. |
Acyl chlorides (-COCl) quickly undergoes hydrolysis at room temperature with |
| A. | strong alkali |
| B. | water |
| C. | strong base |
| D. | strong acid |
| Answer» C. strong base | |
| 90. |
Many of pigments found in living things can be used as |
| A. | indicators |
| B. | reactants |
| C. | catalyst |
| D. | enzymes |
| Answer» B. reactants | |
| 91. |
H₂SO₃ is formula of |
| A. | Sulfatic acid |
| B. | Sulfuric acid |
| C. | Sulfourous acid |
| D. | Sulfite acid |
| Answer» D. Sulfite acid | |
| 92. |
Carminic acid gives purple color with |
| A. | acids (H⁺) |
| B. | alkalis (OH⁻) |
| C. | weak acids (H⁺) |
| D. | none of above |
| Answer» C. weak acids (H⁺) | |
| 93. |
Neutral oxides |
| A. | are soluble in water |
| B. | are insoluble in water |
| C. | are metallic oxides |
| D. | include CO₂ |
| Answer» C. are metallic oxides | |
| 94. |
Nitric acid reacts with copper to form |
| A. | copper oxides |
| B. | copper nitrate |
| C. | copper sulphate |
| D. | None of Above |
| Answer» E. | |
| 95. |
On the description of the proton, the new classification of acid and base was given by |
| A. | J. Bronsted only |
| B. | T. Lowry only |
| C. | J.Dalton |
| D. | J. Bronsted and T. Lowry |
| Answer» E. | |
| 96. |
Strong acids do not include |
| A. | H₂SO₄ |
| B. | HNO₃ |
| C. | HCl |
| D. | H₂SO₃ |
| Answer» E. | |
| 97. |
CH₃COCl is the structural formula for |
| A. | ethanoic acid |
| B. | Ethanoyl chloride |
| C. | ethanal chloride |
| D. | ethanol |
| Answer» C. ethanal chloride | |
| 98. |
To stop emission of SO₂ into atmosphere, the chimneys are covered with |
| A. | scrubbers |
| B. | converters |
| C. | burners |
| D. | metallic nets |
| Answer» B. converters | |
| 99. |
Litmus is used to test either the substance is |
| A. | acidic only |
| B. | alkaline only |
| C. | liquid |
| D. | acid and alkaline |
| Answer» E. | |
| 100. |
Substances which can act like acid (H⁺) or base (OH⁻) are known as |
| A. | amphoteric |
| B. | amorphous |
| C. | alkalis |
| D. | base |
| Answer» B. amorphous | |