MCQOPTIONS
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MCQOPTIONS
This section includes 181 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Ceramics are |
| A. | resistant to flow of electricity |
| B. | good conductors of electricity |
| C. | form of sublimates |
| D. | are largely transitioned elements |
| Answer» B. good conductors of electricity | |
| 2. |
In electrolysis of pure ionic molten compounds, metal is formed at |
| A. | anode |
| B. | cathode |
| C. | inert electrode |
| D. | base of the apparatus |
| Answer» C. inert electrode | |
| 3. |
Hydrochloric Acid (HCl) is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | natural acid |
| Answer» B. non-electrolyte | |
| 4. |
Electrolysis is used for |
| A. | electroplating |
| B. | electrorefinning |
| C. | extraction of metals |
| D. | all of these |
| Answer» E. | |
| 5. |
Non-conductors include |
| A. | non-metals |
| B. | plastics |
| C. | nylon |
| D. | both a and b |
| Answer» D. both a and b | |
| 6. |
Distilled water is an example of |
| A. | strong electrolyte |
| B. | non-electrolyte |
| C. | weak electrolyte |
| D. | catalyst |
| Answer» C. weak electrolyte | |
| 7. |
Position of metals in reactivity series does not determine the |
| A. | rate of polarization |
| B. | duration the light bulb will glow |
| C. | brightness of the light |
| D. | nature of bonding |
| Answer» B. duration the light bulb will glow | |
| 8. |
In a Magnesium-Copper battery with dilute acid as electrolyte, at cathode, element is |
| A. | hydrogen gas is bubbled off |
| B. | electrons are produced |
| C. | copper takes up the electrons produced by magnesium |
| D. | Chlorine gas is bubbled off |
| Answer» B. electrons are produced | |
| 9. |
Selective charges occurs for the |
| A. | ions which require least energy to be discharged |
| B. | ions which require most energy to be discharged |
| C. | elements of group VII |
| D. | metal chlorides |
| Answer» B. ions which require most energy to be discharged | |
| 10. |
During electrolysis, anions travel towards |
| A. | cathode |
| B. | anode |
| C. | electrode |
| D. | inert electrode |
| Answer» C. electrode | |
| 11. |
Ceramics can conduct |
| A. | heat |
| B. | electricity |
| C. | light |
| D. | none of above |
| Answer» E. | |
| 12. |
The part of a platinum electrode in a reaction is |
| A. | more |
| B. | less |
| C. | neutral |
| D. | often |
| Answer» C. neutral | |
| 13. |
The concentrated aqueous solution of sodium chloride is called |
| A. | brine |
| B. | milk of magnesia |
| C. | sludge |
| D. | bauxite |
| Answer» B. milk of magnesia | |
| 14. |
Electrolysis purify bauxite (Al(OH)₃) to give pure |
| A. | Al₂O₃ |
| B. | AlCl₃ |
| C. | AlO |
| D. | AlCl |
| Answer» B. AlCl₃ | |
| 15. |
Since ions are held in fixed positions by strong forces, electricity is not conducted by |
| A. | electrodes |
| B. | electrolytes |
| C. | insulators |
| D. | metals |
| Answer» D. metals | |
| 16. |
Porcelain is made for making crockery which is itself being prepared by |
| A. | mud |
| B. | soil |
| C. | clay |
| D. | silicon |
| Answer» D. silicon | |
| 17. |
In electrolysis of brine, ions moving to cathode include |
| A. | sodium + hydrogen ions |
| B. | hydroxide ions |
| C. | chloride ions |
| D. | hydrogen gas is bubbled off |
| Answer» B. hydroxide ions | |
| 18. |
Electrodes refer to the |
| A. | switches in a battery |
| B. | the metal plates carrying electricity in the liquid |
| C. | cathode |
| D. | anode |
| Answer» C. cathode | |
| 19. |
Faraday has proposed two laws of |
| A. | electrolysis |
| B. | hydrolysis |
| C. | electromagnetism |
| D. | gravity |
| Answer» B. hydrolysis | |
| 20. |
Valuable metals are attached to the anode, which is known as |
| A. | ore |
| B. | sludge |
| C. | cryolite |
| D. | bauxite |
| Answer» C. cryolite | |
| 21. |
The difference in potential between metal ion system and another system is called |
| A. | electrode difference |
| B. | electrode potential |
| C. | potential difference |
| D. | electrode charge |
| Answer» C. potential difference | |
| 22. |
The Greek words 'way up ' and 'way down' were given to |
| A. | anode and cathode |
| B. | electrolyte |
| C. | solution |
| D. | electrode |
| Answer» B. electrolyte | |
| 23. |
Electrolysis is used to |
| A. | produce metals |
| B. | purify metals |
| C. | refine metals |
| D. | three of above |
| Answer» E. | |
| 24. |
Conventionally, the electrode potential refers to |
| A. | oxidation |
| B. | reduction |
| C. | neutralization |
| D. | charge potential |
| Answer» C. neutralization | |
| 25. |
Na₃AlF₆ that melts at 1000 °C is known as |
| A. | cryolite |
| B. | bauxite |
| C. | brine |
| D. | sludge |
| Answer» B. bauxite | |
| 26. |
Saucepans can be manufactured through electrolysis of |
| A. | nickel |
| B. | galvanized zinc |
| C. | chromium |
| D. | copper |
| Answer» E. | |
| 27. |
Salts of gold, silver, and platinum are found in droplets falling from |
| A. | anode |
| B. | cathode |
| C. | inert electrode |
| D. | bi-charged electrode |
| Answer» B. cathode | |
| 28. |
Metal core in power cable is not made up of |
| A. | sulphur |
| B. | phosphorus |
| C. | mercury |
| D. | all of these |
| Answer» E. | |
| 29. |
The best electric insulator in four of the following is |
| A. | Al₂O₃ |
| B. | P₄O₁₀ |
| C. | MgO |
| D. | Na₂O |
| Answer» C. MgO | |
| 30. |
Variety of ceramics made up of |
| A. | silicon dioxide |
| B. | silicon(II) oxide |
| C. | silicon trioxide |
| D. | silicon IV oxide |
| Answer» D. silicon IV oxide | |
| 31. |
Impurities like silver and gold are found in anode of |
| A. | Magnesium |
| B. | Copper |
| C. | Graphite |
| D. | Carbon |
| Answer» C. Graphite | |
| 32. |
Ceramics with silicon(II) oxide (SiO) is used for |
| A. | furnace linings |
| B. | abrasives |
| C. | glass and porcelain |
| D. | all of above |
| Answer» E. | |
| 33. |
In a magnesium-copper battery with dilute acid as electrolyte, |
| A. | the bulb can stay bright for very long |
| B. | the duration of bulb brightness is shorter |
| C. | the bulb gets dimmer |
| D. | the bulb cannot be lighten up. |
| Answer» C. the bulb gets dimmer | |
| 34. |
The purification of copper is only possible by |
| A. | hydrolysis |
| B. | electrolysis |
| C. | photolytic |
| D. | heating |
| Answer» C. photolytic | |
| 35. |
The particles which move towards cathode are called |
| A. | anions |
| B. | cations |
| C. | photons |
| D. | positrons |
| Answer» C. photons | |
| 36. |
The carbon or graphite rod which is used to conduct electricity in electrolyte is called |
| A. | electrode |
| B. | anode |
| C. | cathode |
| D. | all of above |
| Answer» E. | |
| 37. |
The liquid in an electrolytic cell should always flows towards |
| A. | anode |
| B. | cathode |
| C. | all around |
| D. | nowhere |
| Answer» C. all around | |
| 38. |
Species with higher oxidation are always written in an equation on the |
| A. | left hand side |
| B. | right hand side |
| C. | middle |
| D. | nowhere |
| Answer» B. right hand side | |
| 39. |
The types of half cell include |
| A. | metal/metal ion |
| B. | non-metal/non-metal |
| C. | ion/ion |
| D. | all of above |
| Answer» E. | |
| 40. |
Ceramics bear the properties of |
| A. | high melting and boiling point |
| B. | hard |
| C. | chemically unreactive |
| D. | all of above |
| Answer» E. | |
| 41. |
Aluminum oxide has the melting point of |
| A. | 2140 °C |
| B. | 2040 °C |
| C. | 2000 °C |
| D. | 4020 °C |
| Answer» C. 2000 °C | |
| 42. |
To know, that electricity is flowing through circuit, |
| A. | switches are used |
| B. | a bulb is attached |
| C. | it is held in middle fingers |
| D. | a micro chronometer shall be used |
| Answer» C. it is held in middle fingers | |
| 43. |
The inorganic non-metallic solid which is made by heating a mixture of substance to a very high temperature gives off |
| A. | ceramic |
| B. | molten |
| C. | solid |
| D. | brass |
| Answer» B. molten | |
| 44. |
Electrolyte liquid may include |
| A. | solutions |
| B. | molten solids |
| C. | gases |
| D. | both a and b |
| Answer» E. | |
| 45. |
Ions discharged in electrolysis depends on |
| A. | relative electrode potential |
| B. | concentration of ions |
| C. | relative electrode charge |
| D. | density of electrolyte |
| Answer» D. density of electrolyte | |
| 46. |
Types of electrodes used during electrolysis affect the |
| A. | rate of electrolysis |
| B. | products of electrolysis |
| C. | selective discharge of ions |
| D. | formation of hydrogen ions |
| Answer» C. selective discharge of ions | |
| 47. |
Advantages dry cells offer are that they are |
| A. | cheap |
| B. | convenient |
| C. | portable |
| D. | all of these |
| Answer» E. | |
| 48. |
The process of decomposition of a compound into its elements by the passage of electric current is called as |
| A. | hydrolysis |
| B. | electrolysis |
| C. | proteolysis |
| D. | catalysis |
| Answer» C. proteolysis | |
| 49. |
Even a small amount of impurities can affect the conductivity of |
| A. | iron |
| B. | copper |
| C. | ammonia |
| D. | calcium |
| Answer» C. ammonia | |
| 50. |
The benefits of cryolite |
| A. | dissolves aluminum oxide only |
| B. | improves electrical conductivity only |
| C. | oxidizes the electrolyte |
| D. | dissolves aluminum oxide and improves electrical conductivity |
| Answer» E. | |