MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Chemistry knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Alkali metals dissolving in Ammonia liquid give the blue solution, this is due to the formation of ammoniated _____________ |
| A. | ions |
| B. | metal cations only |
| C. | metal cations and electrons |
| D. | electrons only |
| Answer» D. electrons only | |
| 2. |
Lithium fluoride is _____________ in water. |
| A. | completely soluble |
| B. | soluble |
| C. | insoluble |
| D. | cannot say |
| Answer» D. cannot say | |
| 3. |
Which of the following is true regarding the reactivity order of alkali metals towards hydrogen? |
| A. | Li < Na < K > Rb |
| B. | Lithium < Na < K < Rb < Cs |
| C. | Li > Na < Cs |
| D. | Li < Rb > Cs |
| Answer» C. Li > Na < Cs | |
| 4. |
Sodium Peroxide is _____________ in colour and potassium superoxide is used as a source of _____________ |
| A. | blue, yellow |
| B. | yellow, hydrogen |
| C. | blue, oxygen |
| D. | yellow, oxygen |
| Answer» E. | |
| 5. |
What happens when alkali metals are exposed to moist air? |
| A. | formation of nitrates |
| B. | formation of oxides |
| C. | formation of chlorides |
| D. | formation of sulphates |
| Answer» C. formation of chlorides | |
| 6. |
All alkali metals are good dash agents? |
| A. | oxidizing |
| B. | reducing |
| C. | both oxidising and reducing |
| D. | neither oxidizing not reducing |
| Answer» C. both oxidising and reducing | |
| 7. |
Caesium has the highest electrical conductivity in its group. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 8. |
The flame of caesium is in the colour _____________ |
| A. | white |
| B. | red violet |
| C. | yellow |
| D. | blue |
| Answer» E. | |
| 9. |
Does the degree of hydration depend upon the size of the cation? |
| A. | Yes |
| B. | No |
| C. | Maybe |
| D. | Cannot say |
| Answer» B. No | |
| 10. |
Alkaline earth metals show +1 Oxidation state and their atomic volume _____________ down the group. |
| A. | is irregular |
| B. | increase |
| C. | decrease |
| D. | do not change |
| Answer» D. do not change | |
| 11. |
Alkali metals are strongly _____________ |
| A. | neutral |
| B. | electropositive |
| C. | electronegative |
| D. | non-metallic |
| Answer» C. electronegative | |
| 12. |
Is there removal of second electron difficult in alkali metals? |
| A. | Yes |
| B. | No |
| C. | Maybe |
| D. | Cannot say |
| Answer» B. No | |
| 13. |
The melting point of alkali metal is _____________ |
| A. | depends on the atmosphere |
| B. | low |
| C. | high |
| D. | zero |
| Answer» C. high | |
| 14. |
Alkali metals have the biggest atomic radii. |
| A. | true |
| B. | false |
| Answer» B. false | |
| 15. |
Which of the following metal is not an alkali metal? |
| A. | magnesium |
| B. | rubidium |
| C. | sodium |
| D. | caesium |
| Answer» B. rubidium | |