Q.

Considering the elements B, Al, Mg and K, the correct decreasing order of their metallic character is

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a

B > Al > Mg > K

b

Al > Mg > B > K

c

Mg > Al > K > B

d

K > Mg > Al > B

answer is D.

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Detailed Solution

In a group, metallic character increases from top to bottom as ionisation energy decreases and in a period metallic character decreases from left to right as tendency to lose electron decreases.Therefore, the correct order isK > Mg > Al > B.
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