Question

Which of the following hydroxides is acidic?

A. $$Al{\left( {OH} \right)_3}$$
B. $$Ga{\left( {OH} \right)_3}$$
C. $$Tl{\left( {OH} \right)_3}$$
D. $$B{\left( {OH} \right)_3}$$  
Answer :   $$B{\left( {OH} \right)_3}$$
Solution :
$$B{\left( {OH} \right)_3}$$  orthoboric acid is acidic in nature and can accept $$O{H^ - }$$ ions to release $${H^ + }$$ in solution.
$${H_3}B{O_3} + 2{H_2}O \to $$     $${H_3}{O^ + } + {\left[ {B{{\left( {OH} \right)}_4}} \right]^ - }$$

Releted MCQ Question on
Inorganic Chemistry >> P - Block Elements

Releted Question 1

The reddish brown coloured gas formed when nitric oxide is oxidised by air is

A. $${N_2}{O_5}$$
B. $${N_2}{O_4}$$
C. $$N{O_2}$$
D. $${N_2}{O_3}$$
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Releted Question 2

The temporary hardness of water due to calcium carbonate can be removed by adding —

A. $$CaC{O_3}$$
B. $$Ca{\left( {OH} \right)_2}\,$$
C. $$CaC{l_2}$$
D. $$\,HCl$$
View Answer
Releted Question 3

Which of the following is most stable to heat

A. $$HCl$$
B. $$HOCl$$
C. $$HBr$$
D. $$HI$$
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Releted Question 4

White $$P$$ reacts with caustic soda. The products are $$P{H_3}$$ and $$Na{H_2}P{O_2}.$$   This reaction is an example of

A. Oxidation
B. Reduction
C. oxidation and reduction
D. Neutralisation
View Answer

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P - Block Elements

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