MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Hydrogen sulphate HSO |
| A. | negative charge |
| B. | positive charge |
| C. | None of Above |
| D. | double negative charge |
| Answer» B. positive charge | |
| 2. |
Consider the reaction: AgNO |
| A. | aqueous |
| B. | solid |
| C. | None of Above |
| D. | Both A and B |
| Answer» C. None of Above | |
| 3. |
Consider the equation: Fe+2 (aq) + 2OH- (aq) → Fe(OH) |
| A. | blue color |
| B. | green color |
| C. | white color |
| D. | brown color |
| Answer» C. white color | |
| 4. |
In H |
| A. | 0.5032 |
| B. | 0.1111 |
| C. | 0.3265 |
| D. | 0.6531 |
| Answer» E. | |
| 5. |
Ethanol C |
| A. | non-electrolyte |
| B. | strong electrolyte |
| C. | None of Above |
| D. | weak electrolyte |
| Answer» B. strong electrolyte | |
| 6. |
Sublimation, dissolving and filtration can only be carried out in |
| A. | insoluble substances in liquids |
| B. | soluble-substances in solution |
| C. | solid-solid mixtures |
| D. | liquid-liquid mixtures |
| Answer» D. liquid-liquid mixtures | |
| 7. |
State symbol indicate the |
| A. | the solubility |
| B. | state form |
| C. | the volatility |
| D. | the rigidity |
| Answer» C. the volatility | |
| 8. |
NH |
| A. | double positive charge |
| B. | positive charge |
| C. | double negative charge |
| D. | negative charge |
| Answer» C. double negative charge | |
| 9. |
The formula Al(NO |
| A. | three molecules of aluminum are combined with three molecules of Nitrate ion |
| B. | three molecules of aluminum are combined with three molecules of Nitrogen oxide |
| C. | None of Above |
| D. | one molecules of aluminum is combined with three molecules of Nitrate ion |
| Answer» E. | |
| 10. |
The melting point of silicon is |
| A. | 110 °C |
| B. | 410 °C |
| C. | 1410 °C |
| D. | 140 °C |
| Answer» D. 140 °C | |
| 11. |
MSG (Monosodium glutamate) is added in food |
| A. | as a food flavourer |
| B. | as a preservative |
| C. | None of Above |
| D. | to enable quick cooking when consumed |
| Answer» B. as a preservative | |
| 12. |
Conversion of copper hydroxide into copper oxide and water is an example of |
| A. | Thermal decomposition |
| B. | combustion |
| C. | Respiration |
| D. | Neutralization |
| Answer» B. combustion | |
| 13. |
Covalent compounds readily become soluble in |
| A. | non-polar solvents |
| B. | polar solvents |
| C. | None of Above |
| D. | Both A and B |
| Answer» B. polar solvents | |
| 14. |
Liquid-liquid miscible mixtures can be separated through |
| A. | fractional distillation |
| B. | chromatography |
| C. | None of Above |
| D. | Both A and B |
| Answer» E. | |
| 15. |
In electroplating, the solution must be of the salt of the metal |
| A. | of the object to be electroplated |
| B. | to electroplate with |
| C. | None of Above |
| D. | to any type of liquid |
| Answer» C. None of Above | |
| 16. |
Through the separating funnel, immiscible solutions |
| A. | can not be separated completely |
| B. | can not be separated |
| C. | can be centrifuged |
| D. | can be easily decanted |
| Answer» B. can not be separated | |
| 17. |
A non-electrolyte |
| A. | is a covalent substances |
| B. | does not conduct electricity |
| C. | all of these |
| D. | does not form ions |
| Answer» D. does not form ions | |
| 18. |
When the heating begins in miscible solutions, the vapors formed will be |
| A. | of liquid higher in boiling point |
| B. | of liquid lower in boiling point |
| C. | collected in a gas syringe |
| D. | vapors will be of both liquids with a higher concentration of liquid having low boiling point |
| Answer» E. | |
| 19. |
In electronic industry, silicon is used in making |
| A. | television sets |
| B. | microwave oven bodies |
| C. | motherboards |
| D. | microchips |
| Answer» E. | |
| 20. |
Same number of shells are found in elements of |
| A. | same period |
| B. | same group |
| C. | None of Above |
| D. | Both A and B |
| Answer» B. same group | |
| 21. |
The distillate formed after distillation is |
| A. | may contain impurities |
| B. | a diluted solution |
| C. | a concentrated solution |
| D. | a condensed solution |
| Answer» E. | |
| 22. |
Common covalent bonds include |
| A. | KF |
| B. | MgO |
| C. | CH |
| D. | |
| E. | LiCl |
| Answer» D. | |
| 23. |
In acid and base reaction, the product includes |
| A. | water |
| B. | a salt(s) |
| C. | all of these |
| D. | Both A and B |
| Answer» E. | |
| 24. |
In an acidified solution of potassium dichromate (VI), dichromate ion becomes reduced to |
| A. | chromium (III) ions |
| B. | chromate (V) ions |
| C. | None of Above |
| D. | Chromium (II) ions |
| Answer» B. chromate (V) ions | |
| 25. |
Elevation of boiling points occur due to |
| A. | a reduced pressure |
| B. | presence of impurities |
| C. | lower rate of evaporation |
| D. | a high pressure |
| Answer» C. lower rate of evaporation | |
| 26. |
In electrolysis of copper purification, at cathode |
| A. | the object to be electroplated is kept |
| B. | pure copper gets deposited |
| C. | None of Above |
| D. | Both A and B |
| Answer» C. None of Above | |
| 27. |
Ethanoic acid CH |
| A. | non-electrolyte |
| B. | strong electrolyte |
| C. | good conductors |
| D. | weak electrolyte |
| Answer» E. | |
| 28. |
Presence of pesticides and herbicides can be tested through |
| A. | decanting |
| B. | careful distillation |
| C. | chromatographs |
| D. | boiling points |
| Answer» D. boiling points | |
| 29. |
An average size cigarette burns in 10 seconds |
| A. | in pure oxygen |
| B. | in pure hydrogen |
| C. | at room temperature |
| D. | in pure carbon dioxide |
| Answer» B. in pure hydrogen | |
| 30. |
The main elements of living things does not include |
| A. | Phosphorus |
| B. | nitrogen |
| C. | Calcium |
| D. | Sodium |
| Answer» E. | |
| 31. |
In solid state, ionic compounds |
| A. | have low boiling points |
| B. | have low melting points |
| C. | are non-conductors of electricity |
| D. | conduct electricity |
| Answer» D. conduct electricity | |
| 32. |
Water-soluble gases do not include |
| A. | carbon dioxide |
| B. | ammonia |
| C. | oxygen |
| D. | hydrogen |
| Answer» E. | |
| 33. |
HCl is a |
| A. | covalent compound |
| B. | ionic compound |
| C. | None of Above |
| D. | Both A and B |
| Answer» E. | |
| 34. |
The range of −5 |
| A. | latent heat of freezing |
| B. | depression of freezing point of ice |
| C. | melting pure ice |
| D. | melting salted ice |
| Answer» E. | |
| 35. |
In the electrolysis of dilute HCl, at cathode |
| A. | hydrogen gas is given off |
| B. | oxygen gas is given off |
| C. | None of Above |
| D. | chlorine gas is given off at anode |
| Answer» B. oxygen gas is given off | |
| 36. |
Crystals refers to |
| A. | a solid that re appears from other substances |
| B. | a solid that can be dissolved in liquids |
| C. | can be obtained through sublimation |
| D. | a solid that reappears from the solution |
| Answer» E. | |
| 37. |
Consider the equation: Zn+2 (aq) + 2OH- (aq) → Zn(OH) |
| A. | blue color |
| B. | green color |
| C. | white color |
| D. | brown color |
| Answer» D. brown color | |
| 38. |
In order to separate colors, dyes and amino acids, useful method will be |
| A. | centrifugation |
| B. | crystallization |
| C. | chromatography |
| D. | filtration |
| Answer» D. filtration | |
| 39. |
Empirical formula can be obtained if knowns are the |
| A. | relative atomic mass Ar |
| B. | %age or mass of each element |
| C. | Both A and B |
| D. | None of These |
| Answer» D. None of These | |
| 40. |
Electronic thermometers |
| A. | alcohol in glass thermometer |
| B. | are mercury in glass thermometer |
| C. | are greatly replaced by alcohol in glass thermometer |
| D. | are used to reduce the risk of mercury poisoning if broken |
| Answer» E. | |
| 41. |
In Cu |
| A. | +2 |
| B. | +1 |
| C. | −2 |
| D. | −1 |
| Answer» C. −2 | |
| 42. |
Adsorption refers to the |
| A. | diffusion of one substance to the bulk of other substances completely |
| B. | bounding of a substance to the surface of another substance |
| C. | an inability to bond something at the surface |
| D. | boiling of liquid at the surface |
| Answer» C. an inability to bond something at the surface | |
| 43. |
Traces of water can be removed from the ethanol distillate |
| A. | through decanting water |
| B. | through evaporation of water |
| C. | through the use of a suitable during agent |
| D. | through the use of vacuum distillation |
| Answer» D. through the use of vacuum distillation | |
| 44. |
In order to form copper(II) hydroxide, number of hydroxy ions to gain stability with one Copper ion will be |
| A. | 2 |
| B. | 1 |
| C. | 4 |
| D. | 3 |
| Answer» B. 1 | |
| 45. |
In the electrolysis of aqueous CuSO |
| A. | Sulphur dioxide is given off at anode |
| B. | oxygen gas is given off at anode |
| C. | Sulphur dioxide is given off at cathode |
| D. | oxygen gas is given off at cathode |
| Answer» C. Sulphur dioxide is given off at cathode | |
| 46. |
If molten lead bromide is electrolyzed, |
| A. | at anode molten lead can be seen |
| B. | at anode brown fumes of bromide gas are given off |
| C. | None of Above |
| D. | at cathode, brown fumes can be seen |
| Answer» C. None of Above | |
| 47. |
Liquid carbon dioxide is used in making |
| A. | decaffeinated tea |
| B. | caffeine |
| C. | fat-rich foods |
| D. | decaffeinated coffee |
| Answer» E. | |
| 48. |
Sulphourous acid H |
| A. | non-electrolyte |
| B. | strong electrolyte |
| C. | None of Above |
| D. | weak electrolyte |
| Answer» E. | |
| 49. |
The formula Ca(OH) |
| A. | calcium hydroxy acids |
| B. | Calcium Hydrogen per oxide |
| C. | calcium hydroxide |
| D. | calcium hydrogen peroxide |
| Answer» D. calcium hydrogen peroxide | |
| 50. |
Formation of Cl |
| A. | one pair of electron |
| B. | one electron |
| C. | None of Above |
| D. | three electrons |
| Answer» C. None of Above | |