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Q.

Which one of the following is a correct statement about 13th group elements is

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a

Melting point of the Gallium is high

b

Thallium is more stable in  +1 oxidation state than in +3 oxidation state

c

Boron can easily form trivalent cations

d

Aluminium has the least IP1 value in 13th group

answer is B.

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Detailed 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.IP1 trend - B > Tl > Ga > Al > In.
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