MCQOPTIONS
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MCQOPTIONS
This section includes 168 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 151. |
In order to separate colors, dyes and amino acids, useful method will be |
| A. | crystallization |
| B. | centrifugation |
| C. | filtration |
| D. | chromatography |
| Answer» E. | |
| 152. |
Funnel should be at top of circumference of paper by |
| A. | 3-4cm |
| B. | 1-2cm |
| C. | 4-5cm |
| D. | 5-6cm |
| Answer» C. 4-5cm | |
| 153. |
Larger crystals can be obtained if the |
| A. | evaporation is at high temperature |
| B. | evaporation rate is slow |
| C. | evaporation rate is fast |
| D. | evaporation speed remains stable |
| Answer» C. evaporation rate is fast | |
| 154. |
Hydrogen (H₂) is not |
| A. | heavier than carbon dioxide |
| B. | lighter than air |
| C. | colored |
| D. | insoluble |
| Answer» E. | |
| 155. |
An effective way of purifying liquids containing suspensions is |
| A. | crystallization |
| B. | decanting |
| C. | centrifuging |
| D. | separating funnel |
| Answer» D. separating funnel | |
| 156. |
Water can be separated from sea water through |
| A. | centrifugation |
| B. | separating funnel |
| C. | fractional distillation |
| D. | simple distillation |
| Answer» E. | |
| 157. |
Immiscible liquids can be separated through |
| A. | centrifugation |
| B. | decanting |
| C. | separating funnel |
| D. | evaporation |
| Answer» D. evaporation | |
| 158. |
Dissolving, filtering and evaporating are methods of |
| A. | ice melting |
| B. | purification |
| C. | diffusion |
| D. | change of state |
| Answer» C. diffusion | |
| 159. |
Filtration is a slow process if carried by |
| A. | tube |
| B. | clay funnel |
| C. | plastic funnel |
| D. | glass funnel |
| Answer» D. glass funnel | |
| 160. |
Filter paper is made into |
| A. | cone |
| B. | triangle |
| C. | square |
| D. | circle |
| Answer» B. triangle | |
| 161. |
Availability of filter papers is according to various |
| A. | shapes |
| B. | colours |
| C. | dots |
| D. | porosites |
| Answer» E. | |
| 162. |
By using fluted filter paper rate of filtration is |
| A. | unchanged |
| B. | equal |
| C. | decreased |
| D. | increased |
| Answer» E. | |
| 163. |
Hit and trail method is used in crystallization to choose |
| A. | solvent |
| B. | solute |
| C. | solution |
| D. | medium |
| Answer» B. solute | |
| 164. |
One of most common solvent used for crystallization is |
| A. | water |
| B. | syrup |
| C. | normal saline |
| D. | sulphuric acid |
| Answer» B. syrup | |
| 165. |
Process used to separate insoluble particles from liquids is |
| A. | drying |
| B. | filtration |
| C. | sieving |
| D. | extraction |
| Answer» C. sieving | |
| 166. |
Most common example of extraction is with help of |
| A. | Ether |
| B. | alcohol |
| C. | benzene |
| D. | chloroform |
| Answer» B. alcohol | |
| 167. |
Chromatography is used to separate |
| A. | solution |
| B. | mixtures |
| C. | molecules |
| D. | atoms |
| Answer» C. molecules | |
| 168. |
If tip of funnel touches side of beaker it avoids |
| A. | splashing |
| B. | bubbling |
| C. | bumping |
| D. | backflow |
| Answer» B. bubbling | |