Question

Identify $$W, X, Y$$  and $$Z$$ respectively in the given reactions.
\[CaC{{O}_{3}}\xrightarrow{\Delta }W+X\]
$$\eqalign{ & W + {H_2}O \to Y \cr & Y + Z \to NaOH + CaC{O_3} \cr} $$
$$W$$ $$X$$ $$Y$$ $$Z$$
(a) $$CaO$$ $$C{O_2}$$ $$CaC{O_3}$$ $$N{a_2}C{O_3}$$
(b) $$C{O_2}$$ $$Ca{\left( {OH} \right)_2}$$ $$Ca{\left( {HCO} \right)_3}$$ $$NaHC{O_3}$$
(c) $$CaO$$ $$C{O_2}$$ $$Ca{\left( {OH} \right)_2}$$ $$N{a_2}C{O_3}$$
(d) $$C{O_2}$$ $$CaO$$ $${H_2}C{O_3}$$ $$N{a_2}C{O_3}$$

A. (a)
B. (b)
C. (c)  
D. (d)
Answer :   (c)
Solution :
\[CaC{{O}_{3}}\xrightarrow{\Delta }\underset{\left( W \right)}{\mathop{CaO}}\,+\underset{\left( X \right)}{\mathop{C{{O}_{2}}}}\,\]
$$\mathop {CaO}\limits_{\left( W \right)} + {H_2}O \to \mathop {Ca{{\left( {OH} \right)}_2}}\limits_{\left( Y \right)} $$
$$\mathop {Ca{{\left( {OH} \right)}_2}}\limits_{\left( Y \right)} + \mathop {N{a_2}C{O_3}}\limits_{\left( Z \right)} \to $$     $$CaC{O_3} + 2NaOH$$

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

Releted Question 1

A substance absorbs $$C{O_2}$$  and voilently reacts with water. The substance is

A. $$CaC{O_3}$$
B. $$CaO$$
C. $${H_2}S{O_4}$$
D. $$ZnO$$
Releted Question 2

Calcium is obtained by

A. electrolysis of molten $$CaC{l_2}.$$
B. electrolysis of solution of $$CaC{l_2}$$  in water.
C. Reduction of $$CaC{l_2}$$  with carbon.
D. roasting of limestone.
Releted Question 3

A solution of sodium metal in liquid ammonia is strongly reducing due to the presence of

A. sodium atoms
B. sodium hydride
C. sodium amide
D. solvated electrons
Releted Question 4

The hydration energy of $$M{g^{ + + }}$$  is larger than that of :

A. $$A{l^{3 + }}$$
B. $$N{a^ + }$$
C. $$B{e^{ + + }}$$
D. $$M{g^{3 + }}$$

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S - Block Elements


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