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Assertion: Lithium resembles magnesium d...

Assertion: Lithium resembles magnesium diagonally placed in next group.
Reason: The size of `Li^(+) and Mg^(2+)` are different and their electropositive character is same.

A

If both (A) and (R ) are correct and (R ) is the correct explanation of (A).

B

If both (A) and (R ) are correct, but (R ) is not the correct explanation of (A).

C

If (A) is correct, but (R ) is incorrect.

D

If (A) is incorrect, but (R ) is correct.

Text Solution

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The correct Answer is:
A
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CENGAGE CHEMISTRY ENGLISH-S-BLOCK GROUP 1 - ALKALI METALS-Exercises Assertion Reasoning
  1. Assertion (A): NaOH is a stronger base than KOH. Reason (R ): KOH is...

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  2. Assertion (A): Sodium reacts with oxygen to form Na(2)O(2) whereas pot...

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  3. Assertion (A): Aqueous solution of Na(2)CO(3) is alkaline in nature. ...

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  4. Assertion: Lithium resembles magnesium diagonally placed in next group...

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  5. Assertion (A): Alkali metals do not occur in native state. Reason (R...

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  6. Assertion (A) : LiCl is predominantly a covalent compound. Reason (R...

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  7. Assertion (A): Caesium metal when dissolved in liquid amtmonia forms a...

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  8. Assertion (A): Alkali metals dissolve in liquid ammoia to give blue so...

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  9. Assertion (A): Li^(o+) (aq) has large ionic redius than Na^(o+) (aq). ...

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  10. Assertion (A): In rainy season, common salt becomes damp after sometim...

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  11. Assertion (A): Na(2)CO(3) and Li(2)CO(3) are thermally stable. Reaso...

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  12. Assertion (A): Lithium reacts with oxygen to form Li(2)O, but potassiu...

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  13. Assertion (A): Among the alkali metals caesium salts exhibit the maxim...

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  14. Assertion (A): CuCI is more covalent than NaCI. Reason (R ): Na^(o+)...

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  15. A: Sodium ions are discharged when aqueous solution of NaCl is electro...

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  16. Assertion (A): Alkali metlas impart colour to the flame. Reason (R )...

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  17. Assertion (A): Alkali metals are strong reducing agents. Reason (R )...

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  18. Assertion: Potassium is not obtained by the the electrolysis of fused...

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  19. Assertion (A): Alkali metals can form ionic hydrides which contain hyd...

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  20. Assertion (A): Ether can exteract LiCI form a mixture of LiCI, NaCI an...

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