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.
| 151. |
Hydroxonium ions are represented as |
| A. | OH ions |
| B. | H₂O₃ ions |
| C. | H₃O ions |
| D. | H₂O₃ |
| Answer» D. H₂O₃ | |
| 152. |
Consider equation P₄O₁₀ + H₂O → H₃PO₄. Moles of water required in reaction would be |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 153. |
When neutral, indicators show |
| A. | red color |
| B. | blue color |
| C. | yellow/green color |
| D. | pink color |
| Answer» D. pink color | |
| 154. |
Each color is associated with a particular pH in |
| A. | litmus indicator |
| B. | universal indicator |
| C. | methyl orange indicator |
| D. | Phenolphthalein indicators |
| Answer» C. methyl orange indicator | |
| 155. |
In Universal indicators, a pH of 7 is shown with |
| A. | yellow color |
| B. | green color |
| C. | blue color |
| D. | pink color |
| Answer» C. blue color | |
| 156. |
A base which is soluble in water is called |
| A. | hydrous |
| B. | alkali |
| C. | basic |
| D. | acidic |
| Answer» C. basic | |
| 157. |
An alkali (OH-) is a |
| A. | water soluble base |
| B. | water insoluble base |
| C. | oil soluble base |
| D. | oil insoluble base |
| Answer» B. water insoluble base | |
| 158. |
Soap is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | basic |
| Answer» C. neutral | |
| 159. |
Consider equation P₄O₁₀ + H₂O → H₃PO₄. number of moles of H₃PO₄ produced by reaction are |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» C. 6 | |
| 160. |
Apples contain |
| A. | citric acid |
| B. | malic acid |
| C. | tartaric acid |
| D. | acetic acid |
| Answer» C. tartaric acid | |
| 161. |
Phosphoric acid has formula |
| A. | H₂PO₃ |
| B. | H₂PO₄ |
| C. | H₃PO₄ |
| D. | H₃PO₃ |
| Answer» D. H₃PO₃ | |
| 162. |
NaOH + HCl → |
| A. | Na(OH)₂ + H₂ |
| B. | NaCl + H₂ |
| C. | NaCl + H₂O |
| D. | NaCl + H₂ + O₂ |
| Answer» D. NaCl + H₂ + O₂ | |
| 163. |
Bases (OH-) are |
| A. | corrosive |
| B. | turn litmus from blue to red |
| C. | turn litmus from red to blue |
| D. | non-metal oxides |
| Answer» D. non-metal oxides | |
| 164. |
In Universal indicators, red color shows |
| A. | strong acids |
| B. | strong alkalis |
| C. | weak acids |
| D. | weak bases |
| Answer» B. strong alkalis | |
| 165. |
Acids (H+) reacts with metal hydroxides (-OH-) to from |
| A. | salt and water |
| B. | salt and hydrogen gas |
| C. | salt and hydrogen oxides |
| D. | salt and alkali |
| Answer» B. salt and hydrogen gas | |
| 166. |
Acids reacts with metal carbonates to form |
| A. | salt |
| B. | water |
| C. | carbon dioxide |
| D. | all of these |
| Answer» E. | |
| 167. |
Onion juice is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | basic |
| Answer» B. alkaline | |
| 168. |
Universal indicator can be used to |
| A. | test acids and alkalis |
| B. | to test strong acids and weak acids |
| C. | to test concentration of a particular solution |
| D. | both a and b |
| Answer» E. | |
| 169. |
Weak acids include |
| A. | H₂CO₃ |
| B. | H₂SO₃ |
| C. | H₂SO₄ |
| D. | both a and b |
| Answer» E. | |
| 170. |
Acid become colorless when added with |
| A. | screened methyl orange indicators |
| B. | phenolphthalein indicator |
| C. | litmus indicator |
| D. | universal indicator |
| Answer» C. litmus indicator | |
| 171. |
PH of 7 is shown through a color of |
| A. | red |
| B. | blue |
| C. | green |
| D. | yellow |
| Answer» D. yellow | |
| 172. |
Baking Powder is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | salty |
| Answer» C. neutral | |
| 173. |
Insect bites and stinging nettles contain |
| A. | formic acid |
| B. | tartaric acid |
| C. | oxalic acid |
| D. | malic acid |
| Answer» B. tartaric acid | |
| 174. |
Acid shows red color with |
| A. | litmus indicator |
| B. | universal indicator |
| C. | methyl orange indicator |
| D. | all of these |
| Answer» E. | |
| 175. |
Sea water has a pH of |
| A. | 5 |
| B. | 7 |
| C. | 9 |
| D. | 11 |
| Answer» D. 11 | |
| 176. |
Non-metal oxides showing no reaction with acids or alkalis are called as |
| A. | Amphoteric acids |
| B. | neutral oxides |
| C. | acidic oxides |
| D. | basic oxides |
| Answer» C. acidic oxides | |
| 177. |
Lemon juice has a pH of |
| A. | 2 |
| B. | 6 |
| C. | 8 |
| D. | 12 |
| Answer» B. 6 | |
| 178. |
Amphoteric oxides react with acids to form |
| A. | salt |
| B. | water |
| C. | a sweet base |
| D. | both a and b |
| Answer» E. | |
| 179. |
NH₄Cl(s) + NaOH → |
| A. | Na₂CO₃ + H₂+NO₂ |
| B. | Na₂CO₃.(H₂O)₅ + HCl |
| C. | NaCl + H₂O + NH₃ |
| D. | NaCl + HNO₃ |
| Answer» D. NaCl + HNO₃ | |
| 180. |
Consider equation PbO + HCl → PbCl₂ + H₂O. Moles of HCl required to balance equation are |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» C. 3 | |
| 181. |
Chemical formula of Caustic soda is |
| A. | NaOH |
| B. | KOH |
| C. | MgO |
| D. | Ca(OH)₂ |
| Answer» B. KOH | |
| 182. |
In Universal indicators, weak alkalis are indicated through |
| A. | turquoise color |
| B. | blue color |
| C. | light violet color |
| D. | all of these |
| Answer» E. | |
| 183. |
Bleach has an approximate of |
| A. | 5 |
| B. | 8 |
| C. | 11 |
| D. | 14 |
| Answer» D. 14 | |
| 184. |
Best indicator of all is |
| A. | litmus indicator |
| B. | universal indicator |
| C. | methyl orange indicator |
| D. | Phenolphthalein indicators |
| Answer» C. methyl orange indicator | |
| 185. |
Orange juice is |
| A. | acidic |
| B. | alkaline |
| C. | neutral |
| D. | basic |
| Answer» B. alkaline | |
| 186. |
K₂O + H₂O → |
| A. | K(OH)₃ |
| B. | KOH |
| C. | KOH.H₂O |
| D. | KO + H₂ + O₂ |
| Answer» C. KOH.H₂O | |
| 187. |
When an acid (H+) is added to alkali (OH-), product is |
| A. | hydroxides |
| B. | water |
| C. | salts |
| D. | hydrogen gas |
| Answer» D. hydrogen gas | |
| 188. |
More corrosive acid is |
| A. | H₂CO₃ |
| B. | H₂SO₃ |
| C. | HNO₃ |
| D. | C₆H₈O₇ |
| Answer» D. C₆H₈O₇ | |
| 189. |
Excess acidity caused by acid rain can be neutralized by adding |
| A. | more fertilizers |
| B. | by removing the acidified soil |
| C. | by adding P₂O₅ |
| D. | by adding lime |
| Answer» E. | |
| 190. |
Mineral acids are |
| A. | naturally occurring |
| B. | man made |
| C. | include malic acid |
| D. | include formic acid |
| Answer» B. man made | |
| 191. |
WHAT_WILL_BE_THE_PRODUCT_WHEN_HNO3_REACTS_WITH_NH4OH_??$ |
| A. | NH<sub>4</sub> NO<sub>3</sub> |
| B. | 2NH<sub>4</sub> NO<sub>3</sub> |
| C. | NH<sub>4</sub> (NO<sub>3</sub>)<sup>2</sup> |
| D. | NH<sub>2</sub>NO<sub>3</sub> |
| Answer» B. 2NH<sub>4</sub> NO<sub>3</sub> | |
| 192. |
Find_the_odd_one_out:$ |
| A. | Neutral salt : NaCl |
| B. | Acid salt : CuSO<sub>4</sub>.5H<sub>2</sub>O |
| C. | Basic salt: CuCO<sub>3</sub>.Cu(OH)<sup>2</sup> |
| D. | Nonhydrated salt: KNO<sub>3</sub> |
| Answer» C. Basic salt: CuCO<sub>3</sub>.Cu(OH)<sup>2</sup> | |
| 193. |
What is the pH of 0.0001 molar HCl solution? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» E. | |
| 194. |
Which one will change from red litmus to blue? |
| A. | NaCl |
| B. | HCl |
| C. | KOH |
| D. | LiOH |
| Answer» C. KOH | |
| 195. |
Select the one which is neither an acid nor base |
| A. | CH<sub>3</sub>COOH |
| B. | HCl |
| C. | KCl |
| D. | CH<sub>3</sub>OH |
| Answer» D. CH<sub>3</sub>OH | |
| 196. |
MgO + 2HCl —-> X + H2O$ |
| A. | Mg<sub>2</sub>Cl |
| B. | 2MgCl |
| C. | MgCl |
| D. | MgCl<sub>2</sub> |
| Answer» E. | |
| 197. |
Select the one which is wrongly mapped |
| A. | Sodium carbonate – Washing soda |
| B. | Sodium chloride – common salt |
| C. | Calcium carbonate – slaked lime |
| D. | Sodium hydroxide – caustic soda |
| Answer» D. Sodium hydroxide ‚Äö√Ñ√∂‚àö√ë‚àö¬® caustic soda | |
| 198. |
When an acid reacts with a metal, which one of the following gas is usually liberated? |
| A. | ammonia gas |
| B. | chlorine |
| C. | oxygen |
| D. | Hydrogen gas |
| Answer» E. | |
| 199. |
A Strong acid is same as concentrated acid. State true or false |
| A. | False |
| B. | True |
| Answer» B. True | |
| 200. |
Which one is correctly matched? |
| A. | Acids – pH range above7 |
| B. | Acids – pH range below 7 |
| C. | Acids – pH range 7( neutral) |
| D. | Acids – pH range 8-9 |
| Answer» B. Acids ‚Äö√Ñ√∂‚àö√ë‚àö¬® pH range below 7 | |