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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