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Q.

The correct statements among I to III regarding group 13 elements oxidizing state and trends in chemical reactivity are,
(I) Relative stability of +1 oxidation state:  Al < Ga < In < Tl
(II) In thallium +1 oxidation state is highly oxidizing in character
(III) The compounds in +1 oxidation state are more ionic than those in +3 oxidation states

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a

I and II only 

b

I, II and III
 

c

I and III only 

d

II and III only

answer is C.

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Detailed Solution

Thallium +3 oxidation state is highly oxidizing in character

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