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.
| 101. |
Carboxylic acids produce salt plus water by reacting with |
| A. | acids |
| B. | bases |
| C. | alkalis |
| D. | water |
| Answer» C. alkalis | |
| 102. |
Consider equation ZnO + NaOH + H₂O → Na₂Zn(OH)₄. Moles of H₂O required to balance equation would be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 103. |
PH value above 7 is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | basic |
| Answer» C. neutral | |
| 104. |
The taste of lemon is due to the presence of |
| A. | citric acid |
| B. | acetic acid |
| C. | ethanoic acid |
| D. | benzoic acid |
| Answer» B. acetic acid | |
| 105. |
H₂SO₄ is formula of |
| A. | Sulfatic acid |
| B. | Sulfuric acid |
| C. | Sulfurous acid |
| D. | Hydrogen Sulfide |
| Answer» C. Sulfurous acid | |
| 106. |
In Universal indicators, a pH of 4 to 7 indicates |
| A. | strong acids |
| B. | weak acids |
| C. | weak alkalis |
| D. | strong alkalis |
| Answer» C. weak alkalis | |
| 107. |
A base is a class of chemical substances which includes all |
| A. | metal oxides |
| B. | metal hydroxides |
| C. | non-metal oxides |
| D. | both a and b |
| Answer» D. both a and b | |
| 108. |
With acids, universal indicators show a color |
| A. | of red |
| B. | of blue |
| C. | of green |
| D. | of violet |
| Answer» B. of blue | |
| 109. |
HCl(g) dissolved in Methylbenzene (C₇H₈) shows no change on litmus paper because |
| A. | it is highly acidic |
| B. | no free hydrogen protons are available |
| C. | the solution is highly ionic |
| D. | the solution contains hydroxyl ions only |
| Answer» C. the solution is highly ionic | |
| 110. |
Reaction of amines with Acyl chlorides will give off organic product as |
| A. | unsubstituted amide |
| B. | substituted amide |
| C. | added amide |
| D. | subtracted hydrogen |
| Answer» C. added amide | |
| 111. |
A Bronsted-Lowry base is a |
| A. | proton donor |
| B. | proton acceptor |
| C. | neutron donor |
| D. | neutron acceptor |
| Answer» C. neutron donor | |
| 112. |
Phenolphthalein changes color in |
| A. | acids |
| B. | alkalis |
| C. | water |
| D. | salt solutions |
| Answer» C. water | |
| 113. |
Lone pair of an electron to attack carbonyl carbon atom in Acyl chlorides is provided by |
| A. | amides |
| B. | amines |
| C. | ammonia |
| D. | nitrogen |
| Answer» C. ammonia | |
| 114. |
Distinction between a weak acid or strong acid can be made through |
| A. | litmus indicator |
| B. | universal indicator |
| C. | methyl orange indicator |
| D. | Phenolphthalein indicators |
| Answer» C. methyl orange indicator | |
| 115. |
Consider equation ZnO + NaOH + H₂O → Na₂Zn(OH)₄. Moles of product required to balance equation would be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» B. 2 | |
| 116. |
Consider equation Al₂O₃ + NaOH + H₂O →NaAl(OH)₄. Moles of H₂O required to balance equation would be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 117. |
In neutralization reactions, conductivity meters are an ideal choice |
| A. | to record change in pH |
| B. | to measure and remove the H+ and OH- ions |
| C. | to record heat given out |
| D. | to measure the amount of current flowing |
| Answer» C. to record heat given out | |
| 118. |
Saccharin is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | salt solution |
| Answer» B. alkaline | |
| 119. |
In Universal indicators, a pH of 11 to 14 is indicated through |
| A. | turquoise color |
| B. | violet color |
| C. | blue color |
| D. | light violet color |
| Answer» C. blue color | |
| 120. |
Acidic oxides do not include |
| A. | CO₂ |
| B. | SO₂ |
| C. | P₂O₅ |
| D. | PbO |
| Answer» E. | |
| 121. |
The insect which feeds on cactus has a scarlet pigment known as |
| A. | cochineal only |
| B. | Carminic acid only |
| C. | chloroplast |
| D. | cochineal and Carminic acid |
| Answer» E. | |
| 122. |
A reactive organic compound related to a carboxylic acid, with OH⁻ group, replaced by a Cl atom is known as |
| A. | Acyl chloride |
| B. | aryls |
| C. | benzene |
| D. | carboxylic acid |
| Answer» B. aryls | |
| 123. |
PH of soil can be controlled through |
| A. | acid rains |
| B. | neutralization |
| C. | hydrolases |
| D. | reversible reactions |
| Answer» C. hydrolases | |
| 124. |
Vinegar contains a carboxylic acid known as |
| A. | citric acid |
| B. | ethanoic acid |
| C. | nitric acid |
| D. | Methanoic acid |
| Answer» C. nitric acid | |
| 125. |
The country is more developed if it is utilizing more chemical |
| A. | sulfuric acid |
| B. | nitric acid |
| C. | benzoic acid |
| D. | acetic acid |
| Answer» B. nitric acid | |
| 126. |
Chlorine atoms are regarded as electron |
| A. | withdrawing group |
| B. | acceptor |
| C. | donators |
| D. | none of above |
| Answer» B. acceptor | |
| 127. |
The Acyl chloride react with nucleophile breaking C-Cl bond producing white fumes of |
| A. | hydrogen chloride |
| B. | carbon chloride |
| C. | chlorine gas (Cl₂) |
| D. | hydrogen gas (H₂) |
| Answer» B. carbon chloride | |
| 128. |
Acid ionizes and forms hydrogen ions when dissolved in |
| A. | water |
| B. | base |
| C. | alcohol |
| D. | alkali |
| Answer» B. base | |
| 129. |
Sulfur can be mined from the ground and the states exporting it around the world are |
| A. | Poland and America |
| B. | China and India |
| C. | America and England |
| D. | Brazil and Poland |
| Answer» B. China and India | |
| 130. |
Carboxylic acids are high/very |
| A. | unreactive |
| B. | reactive |
| C. | easily made |
| D. | soft |
| Answer» B. reactive | |
| 131. |
In Universal indicators, violet color indicates |
| A. | strong acids |
| B. | strong alkalis |
| C. | weak acids |
| D. | weak bases |
| Answer» C. weak acids | |
| 132. |
Most metals react with acids to form |
| A. | salt |
| B. | hydrogen gas |
| C. | alkalis |
| D. | both a and b |
| Answer» E. | |
| 133. |
Basic oxides do not include |
| A. | K₂O |
| B. | P₄O₁₀ |
| C. | Na₂O |
| D. | CaO |
| Answer» C. Na₂O | |
| 134. |
Oven Cleaner has a pH of |
| A. | 0 |
| B. | 1 |
| C. | 7 |
| D. | 14 |
| Answer» E. | |
| 135. |
In presence of phenolphthalein, alkali shows |
| A. | blue color |
| B. | violet color |
| C. | pink color |
| D. | green color |
| Answer» D. green color | |
| 136. |
Amphoteric oxides include |
| A. | SO₂ |
| B. | ZnO |
| C. | P₂O₅ |
| D. | P₄O₁₀ |
| Answer» C. P₂O₅ | |
| 137. |
The amphoteric oxide among the given four is |
| A. | Na₂O |
| B. | MgO |
| C. | Al₂O₃ |
| D. | SO₃ |
| Answer» D. SO₃ | |
| 138. |
CCl₃COOH is the strongest of |
| A. | acids |
| B. | bases |
| C. | alkalis |
| D. | compounds |
| Answer» B. bases | |
| 139. |
The scrubbers acts against unconverted SO₂ and |
| A. | neutralize it |
| B. | accelerate it |
| C. | recycle it |
| D. | none of above |
| Answer» B. accelerate it | |
| 140. |
Acyl chloride which does not undergo hydrolysis at all is |
| A. | chlorobenzene |
| B. | iodobenzene |
| C. | fluorobenzene |
| D. | none of above |
| Answer» B. iodobenzene | |
| 141. |
In neutralization reactions, instead of pH meter, |
| A. | barometer should be used |
| B. | gas syringe shall be used |
| C. | data loggers are a better choice |
| D. | heat sensors should be used |
| Answer» E. | |
| 142. |
Corrosive acids like sulfuric acid can act like |
| A. | base |
| B. | alkali |
| C. | acid |
| D. | neutral |
| Answer» B. alkali | |
| 143. |
The raw material required for the production of sulfuric acid is |
| A. | sulfur |
| B. | air |
| C. | water |
| D. | all of above |
| Answer» E. | |
| 144. |
The pH of a weak acid can be calculated by knowing |
| A. | concentration of acid only |
| B. | value of Ka only |
| C. | water potential |
| D. | concentration of acid and value of Ka |
| Answer» E. | |
| 145. |
Consider equation Al₂O₃ + NaOH + H₂O →NaAl(OH)₄. Moles of product required to balance reaction would be |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 146. |
Scrubbers are composed of |
| A. | calcium hydroxide |
| B. | calcium carbonate only |
| C. | calcium hydroxide |
| D. | calcium hydroxide and calcium carbonate |
| Answer» E. | |
| 147. |
Cider is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | basic |
| Answer» B. alkaline | |
| 148. |
In Universal indicators, weak acids are represented through a color of |
| A. | Reddish orange |
| B. | Orange |
| C. | Yellow |
| D. | all of these |
| Answer» E. | |
| 149. |
In solution, acids |
| A. | become ionic |
| B. | cannot act as covalent |
| C. | become electrolyte |
| D. | all of these |
| Answer» E. | |
| 150. |
Vinegar has a pH of |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |