AP EAMCET · Chemistry · p Block Elements (Group 13 & 14)
The correct order of melting points of \(\mathrm{Al}, \mathrm{Ga}, \mathrm{In}\) is
- A \(\mathrm{Ga} < \mathrm{In} < \mathrm{Al}\)
- B In \( < \mathrm{Ga} < \mathrm{Al}\)
- C \(\mathrm{Al} < \mathrm{Ga} < \mathrm{In}\)
- D \(\mathrm{Ga} < \mathrm{Al} < \) In
Answer & Solution
Correct Answer
(A) \(\mathrm{Ga} < \mathrm{In} < \mathrm{Al}\)
Step-by-step Solution
Detailed explanation
The melting points of group 13 elements follow the order:- \(\mathrm{B}>\mathrm{Al}>\mathrm{Tl}>\mathrm{In}>\mathrm{Ga}\) 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…
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