Q.
The elements having the maximum and minimum melting points among the members of group 13 are respectively -
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NTA AbhyasNTA Abhyas 2020The p-Block Elements - Part2
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Solution:
Melting point in group - 13 decreases down the group but the trend is not regular. Boron has the highest melting point because of its very strong covalent structure. Gallium has a very low melting point (29.8 K) and, therefore, could exist in liquid state during summer.