MCQOPTIONS
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MCQOPTIONS
This section includes 20 Mcqs, each offering curated multiple-choice questions to sharpen your Applied Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Metal nano particles particularly _____________ nano particles are prepared by the chemical reduction method. |
| A. | Silver |
| B. | Gold |
| C. | Platinum |
| D. | Tungsten |
| Answer» B. Gold | |
| 2. |
Sol-gel method can produce __________ systems. |
| A. | Uniform multi component |
| B. | Non uniform multi component |
| C. | Multi component |
| D. | Non uniform multi component |
| Answer» B. Non uniform multi component | |
| 3. |
One of the advantages of sol-gel method is able to get uniform and _________ powder. |
| A. | Micro size |
| B. | Large size |
| C. | Nano size |
| D. | Small size |
| Answer» E. | |
| 4. |
After drying process the liquid phase is removed from the gel and ___________ is performed. |
| A. | Calcination |
| B. | De-oxygenation |
| C. | Oxygenation |
| D. | Hydrogenation |
| Answer» B. De-oxygenation | |
| 5. |
Formation of an inorganic continuous network containing the metal centres with _________ |
| A. | Azo |
| B. | Oxo |
| C. | Nitro |
| D. | Hydro |
| Answer» C. Nitro | |
| 6. |
AFTER_DRYING_PROCESS_THE_LIQUID_PHASE_IS_REMOVED_FROM_THE_GEL_AND_____________IS_PERFORMED.?$ |
| A. | Calcination |
| B. | De-oxygenation |
| C. | Oxygenation |
| D. | Hydrogenation |
| Answer» B. De-oxygenation | |
| 7. |
Sol-gel method can produce __________ systems. |
| A. | Uniform multi component |
| B. | Non uniform multi component |
| C. | Multi component |
| D. | Non uniform multi component |
| Answer» B. Non uniform multi component | |
| 8. |
One of the advantages of sol-gel method is able to get uniform and___________powder. |
| A. | Micro size |
| B. | Large size |
| C. | Nano size |
| D. | Small size |
| Answer» E. | |
| 9. |
The transparent colourless solution solution is changed into pale yellow from ___________ in chemical reduction method. |
| A. | pale blue |
| B. | Purple |
| C. | Pale red |
| D. | Dark brown |
| Answer» D. Dark brown | |
| 10. |
To remove the excess silver ions the solution is washed with _________ under nitrogen stream. |
| A. | Heavy water |
| B. | Mineral water |
| C. | Deioniser water |
| D. | Impure water |
| Answer» D. Impure water | |
| 11. |
The ___________ and citrate solution are used as reducing agents in chemical reduction method. |
| A. | Hydrazine hydrate |
| B. | Hydrazine |
| C. | Hydrazone |
| D. | Semi carbazene |
| Answer» B. Hydrazine | |
| 12. |
Metal_nano_particles_particularly_______________nano_particles_are_prepared_by_the_chemical_reduction_method. |
| A. | Silver |
| B. | Gold |
| C. | Platinum |
| D. | Tungsten |
| Answer» B. Gold | |
| 13. |
Formation of an inorganic continuous network containing the metal centres with ________? |
| A. | Azo |
| B. | Oxo |
| C. | Nitro |
| D. | Hydro |
| Answer» C. Nitro | |
| 14. |
The solvent evolves towards the formation of an inorganic continuous network containing a ___________ |
| A. | Gaseous phase |
| B. | Gel |
| C. | Solid phase |
| D. | Semi solid phase |
| Answer» C. Solid phase | |
| 15. |
__________ undergo hydrolysis and poly condensation reactions. |
| A. | Metal ions |
| B. | Metal carbonates |
| C. | Metal nitrates |
| D. | Metal oxides |
| Answer» E. | |
| 16. |
Sol-gel method is ________ chemical process. |
| A. | Dry |
| B. | Wet |
| C. | Semi liquid |
| D. | Semi solid |
| Answer» C. Semi liquid | |
| 17. |
The gel is a ___________ mass. |
| A. | Heavy molecular |
| B. | Semi regid |
| C. | Regid |
| D. | Light molecular |
| Answer» C. Regid | |
| 18. |
The sol-gel is a __________ of solid particle. |
| A. | Sublimation |
| B. | Melting |
| C. | Colloidal suspension |
| D. | Cool down |
| Answer» D. Cool down | |
| 19. |
Sol-gel method is known since ____________ |
| A. | 1970 |
| B. | 1960 |
| C. | 1980 |
| D. | 1990 |
| Answer» D. 1990 | |
| 20. |
Sol-gel method is ________ approach. |
| A. | Bottom up |
| B. | Up bottom |
| C. | Top down |
| D. | Down top |
| Answer» B. Up bottom | |