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The correct arrangement of increasing or...

The correct arrangement of increasing order of atomic radius among Na, K, Mg, Rb is

A

Na `gt` K `gt` Mg `gt` Rb

B

K `gt` Na `gt` Mg `gt` Rb

C

Na `gt` Mg `gt` K `gt` Rb

D

Mg `gt` Na `gt` K `gt` Rb.

Text Solution

Verified by Experts

The correct Answer is:
D
The increasing order of atomic radius (metallic) is
Mg(160 pm) `lt` Na (180 pm) `lt` K (227 pm) `lt` Rb (248 pm)
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DINESH PUBLICATION-THE ALKALI METALS-RQ
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  2. Excess of Na^(+) ions in our system causes

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  3. The correct arrangement of increasing order of atomic radius among Na,...

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  4. The metal that dissolves in liquid ammonia, giving a dark blue coloure...

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  5. The number of electrons in [K^(40)]^(-1) are

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  6. Oxone is

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  7. Which one of the following reactions is not associated with the Solvay...

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  8. Aqueous sodium hydroxide reacts with white phosphorus to form phosphin...

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  9. Crystalline sodium chloride is a bad conductor of electricity because

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  10. Solution of K(2)O in water in basic, because it contains a significant...

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  11. Which one of the following metallic hydroxides does not dissolve in so...

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  12. In organic reactions, sodium in liquid ammonia is used as……

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  13. In view of their low ionisation energies, the alkali metals are

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  14. Which of the following has lowest melting point ?

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  15. When sodium is treated with sufficient oxygen/air, the product obtaine...

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  16. Which of the following has the least ionization potential ?

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  17. Smallest among these species is

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  18. In electrolysis of NaCl when Pt electrode is taken H(2) is liberated a...

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  19. An aqueous solution of sodium carbonate is alkaline because sodium car...

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