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Certain characteristics lithium differ f...

Certain characteristics lithium differ from those of other alkali metals, the main reason for this is

A

Small size of lithium atom and `Li^(+)` ion

B

Extremely high electropositivity of Li

C

Greater hardness of Li

D

Hydration of `Li^(+)` ion.

Text Solution

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The correct Answer is:
A

Li differ from other members of the group, mainly due to its small size.
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Discuss the important characteristics in which Li differs from other alkali metals

Both alkali metals and alkaline earth metals are s- block elements. They resemble each other in many respects but still there are certain dissimilarities in their properties due to different number of electrons in the valence shell, different atomic radii, ionisation enthalpy, electronegativity, etc. Like lithium, Be also differs from rest of the alkaline earth metals on account of its small atomic size and high electronetativity. Be^(2+) ion is very small and exerts a high polarising effect on any anion associated with it. The correct sequence of increasing covalent character is

Both alkali metals and alkaline earth metals are s- block elements. They resemble each other in many respects but still there are certain dissimilarities in their properties due to different number of electrons in the valence shell, different atomic radii, ionisation enthalpy, electronegativity, etc. Like lithium, Be also differs from rest of the alkaline earth metals on account of its small atomic size and high electronetativity. Be^(2+) ion is very small and exerts a high polarising effect on any anion associated with it. Which of the bicarbonate does not exist in solid state?

Both alkali metals and alkaline earth metals are s- block elements. They resemble each other in many respects but still there are certain dissimilarities in their properties due to different number of electrons in the valence shell, different atomic radii, ionisation enthalpy, electronegativity, etc. Like lithium, Be also differs from rest of the alkaline earth metals on account of its small atomic size and high electronetativity. Be^(2+) ion is very small and exerts a high polarising effect on any anion associated with it. Which is least thermally stable?

Lithium is the hardest alkali metal.

What makes lithium to show properties uncommon to rest of the alkali metals ?

Lithium is the _____among all alkali metals.

DINESH PUBLICATION-THE ALKALI METALS-RQ
  1. Which one of the following has highest electropositive character ?

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  2. The electronic configuration of metal M is 1s^(2)2s^(2)2p^(6)3s^(1). T...

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  3. Certain characteristics lithium differ from those of other alkali meta...

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  4. The stability of the following alkali metal chlorides follows the orde...

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  5. Which of the following has the highest melting point ?

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  6. When CO is passed over solid NaOH heated to 200^(@)C , it forms

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  7. When a substance a reacts with water, it produces a combustible gas B ...

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  8. The metal extracted by electrolysis of its fused salt is

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  9. Which of the following has the highest conductivity ?

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  10. Cs^(+) ions impart violet colour to Bunsen flame. This is due to the f...

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  11. Which of the following electronic configuration corresponds to an ele...

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  12. A solution of sodium metal in liquid ammonia is strongly reducing due ...

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  13. Anhydrous mixture of KF and HF contains which type of ions ?

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  14. On heating sodium metal in a current of ammonia the compound formed is

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  15. Which of the following alkali metal ions has the lowest ionic mobility...

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  16. In NaCl, the chloride ions occuphy the space in a fashion of

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  17. Lithium is strongest reducing agent among alkali metals due to which o...

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  18. The alkali metal that reacts with nitrogen directly to form nitride is

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  19. Excess of Na^(+) ions in our system causes

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

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