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Question

Consider the M(OH)3 formed by all the group 13 elements. The correct sequence of acidic strength of hydroxides [M(OH)3] is:-

A
B(OH)3<Al(OH)3>Ga(OH)3>In(OH)3>Tl(OH)3
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B
B(OH)3>Tl(OH)3>Al(OH)3>In(OH)3>Ga(OH)3
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C
Al(OH)3>Ga(OH)3>B(OH)3>In(OH)3>Tl(OH)3
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D
B(OH)3>Al(OH)3>Ga(OH)3>In(OH)3>Tl(OH)3
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Solution

The correct option is D B(OH)3>Al(OH)3>Ga(OH)3>In(OH)3>Tl(OH)3
As we know,

I.P acidic strength of hydroxides

and B>Al>Ga>In>Ti−−−−−−−−−−−−−−I.P.

So order of acidic strength is

B(OH)3>Al(OH)3>Ga(OH)3>Ti(OH)3

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