AP EAMCET202315 May 2023Evening ShiftChemistryp Block Elements (Group 13 & 14)Actual
The correct order of melting points of Al , Ga , In is
Options
- AGa < In < Al
- BIn < Ga < Al
- CAl < Ga < In
- DGa < Al < In
Correct answer
A. Ga < In < Al
Step-by-step solution
The melting points of group 13 elements follow the order:- B > Al > Tl > In > Ga This is due to strong crystalline structure of B and soft metallic nature of the rest of the metals. Gallium has unusually low melting point due to very high electro positivity.