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NTA Abhyas NEET2020Chemistryp Block Elements (Group 13 & 14)Practice

The elements having the maximum and minimum melting points among the members of group 13 are respectively -

Options

  1. AB, Tl
  2. BTl, B
  3. CB, Ga
  4. DAl, Tl

Correct answer

C. B, Ga

Step-by-step 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.

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