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The set representing the correct order o...

The set representing the correct order of ionic radius is : a)`Na^(+) gt Mg^(2+) gt Al^(3+) gt Be^(2+) gt Li^(+)` b)`Na^(+) gt Li^(+) gt Mg^(2+) gt Al^(3+) gt Be^(2+)` c)`Na^(+) gt Mg^(2+) gt Al^(3+) gt Li^(+) gt Be^(2+)` d)`Na^(+) gt Mg^(2+) gt Li^(+) gt Be^(2+) gt Al^(3+)`

A

`Na^(+) gt Li^(+) gt Mg ^(2+) gt Be ^(2+)`

B

`Ni^(+) gt Na^(+) gt Mg^(2+) gt Be ^(2+)`

C

`Mg^(2+) gt Be ^(2+) gt Li^(+) Na^(+)`

D

`Li^(+) gt Be ^(2+) gt Na^(+) gt Mg^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
A
The ionic radii of alkali metal ions are larger than those of alkaline earth metal ions belonging to the same period. Also the ionic radii increase down the group. Hecne the correct order of the ionic radii is `Na^(+)gt Li^(+) Mg(2+)gt Be ^(2+).`
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  15. Which of the following if good source of potassium ?

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  16. The first ionization enthalpy of magnesium is lower than the first ion...

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  17. Which of the following feact only with boiling water ?

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  18. Mg burns in air to give

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  19. Beryllium and aluminium exhibit many properties which are similar . Bu...

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