A metal $$M$$ reacts with sodium hydroxide to give a white precipitate $$X$$ which is soluble in excess of $$NaOH$$ to give $$Y.$$ Compound $$X$$ is soluble in $$HCl$$ to form a compound $$Z.$$ Identify $$M, X, Y$$ and $$Z.$$

$$M$$ $$X$$ $$Y$$ $$Z$$

(a) $$Si$$ $$Si{O_2}$$ $$N{a_2}Si{O_3}$$ $$SiC{l_4}$$

(b) $$Al$$ $$Al{\left( {OH} \right)_3}$$ $$NaAl{O_2}$$ $$AlC{l_3}$$

(c) $$Mg$$ $$Mg{\left( {OH} \right)_3}$$ $$NaMg{O_3}$$ $$MgC{l_2}$$

(d) $$Ca$$ $$Ca{\left( {OH} \right)_2}$$ $$N{a_2}C{O_3}$$ $$NaHC{O_3}$$

Question

A metal $$M$$ reacts with sodium hydroxide to give a white precipitate $$X$$ which is soluble in excess of $$NaOH$$ to give $$Y.$$ Compound $$X$$ is soluble in $$HCl$$ to form a compound $$Z.$$ Identify $$M, X, Y$$ and $$Z.$$

$$M$$ $$X$$ $$Y$$ $$Z$$

(a) $$Si$$ $$Si{O_2}$$ $$N{a_2}Si{O_3}$$ $$SiC{l_4}$$

(b) $$Al$$ $$Al{\left( {OH} \right)_3}$$ $$NaAl{O_2}$$ $$AlC{l_3}$$

(c) $$Mg$$ $$Mg{\left( {OH} \right)_3}$$ $$NaMg{O_3}$$ $$MgC{l_2}$$

(d) $$Ca$$ $$Ca{\left( {OH} \right)_2}$$ $$N{a_2}C{O_3}$$ $$NaHC{O_3}$$

A. (a)

B. (b)

C. (c)

D. (d)

Answer : (b)

Solution :
$$\mathop {2Al}\limits_{\left( M \right)} + 2NaOH + 6{H_2}O \to \mathop {2Al{{\left( {OH} \right)}_3}}\limits_{\left( X \right)} $$ \[\xrightarrow[NaOH]{\text{Excess}\,\,\text{of}}\underset{\left( Y \right)}{\mathop{2NaAl{{O}_{2}}}}\,+4{{H}_{2}}O\]
\[\underset{\left( X \right)}{\mathop{Al{{\left( OH \right)}_{3}}}}\,+3HCl\to \underset{\left( Z \right)}{\mathop{AlC{{l}_{3}}}}\,+3{{H}_{2}}O\]

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. $$HI$$

View Answer

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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	$$M$$	$$X$$	$$Y$$	$$Z$$
(a)	$$Si$$	$$Si{O_2}$$	$$N{a_2}Si{O_3}$$	$$SiC{l_4}$$
(b)	$$Al$$	$$Al{\left( {OH} \right)_3}$$	$$NaAl{O_2}$$	$$AlC{l_3}$$
(c)	$$Mg$$	$$Mg{\left( {OH} \right)_3}$$	$$NaMg{O_3}$$	$$MgC{l_2}$$
(d)	$$Ca$$	$$Ca{\left( {OH} \right)_2}$$	$$N{a_2}C{O_3}$$	$$NaHC{O_3}$$

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

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

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

Which of the following is most stable to heat

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

Practice More Releted MCQ Question on P - Block Elements

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

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P - Block Elements