First slide

Atomic and physical properties

Question

Which one of the following is a false statement

Moderate

A

Melting point of the Gallium is high
B

Thallium shows inert pair effect
C

Boron cannot form trivalent cations
D

Indium has the least ${IP}_{1}$ value in 13th group

Solution

Melting point of the Gallium is low(302K).
Thallium shows inert pair effect, it is more stable in +1 state than in +3 state.
Boron cannot form trivalent cations due to very high sum of IP₁, IP₂ and IP₃ values.
${IP}_{1}$ trend - B > Tl > Ga > Al > In.

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