Question

A gas $$'X'$$ is passed through water to form a saturated solution. The aqueous solution on treatment with silver nitrate gives a white precipitate. The saturated aqueous solution also dissolves magnesium ribbon with evolution of a colourless gas $$'Y'$$.  Identify $$'X'\,{\text{and}}\,'Y'$$.

A. $$X = C{O_2},Y = C{l_2}$$
B. $$X = C{l_2},Y = C{O_2}$$
C. $$X = C{l_2},Y = {H_2}$$  
D. $$X = {H_2},Y = C{l_2}$$
Answer :   $$X = C{l_2},Y = {H_2}$$
Solution :
Since the saturated aqueous solution of $$\left( X \right)$$ give white ppt with $$AgN{O_3},$$  so$$\left( X \right)$$ may be $$C{l_2}.$$  Hence
$$\mathop {C{l_2}}\limits_{\left( X \right)} + {H_2}O \to HOCl + HCl$$
$$HCl + AgN{O_3} \to \mathop {AgCl}\limits_{White} \downarrow + HN{O_3}$$
$$2HCl + Mg \to MgC{l_2} + \mathop {{H_2}}\limits_{\left( Y \right)} \uparrow $$

Releted MCQ Question on
Inorganic Chemistry >> Qualitative Analysis

Releted Question 1

The ion that cannot be precipitated by both $$HCl\,{\text{and}}\,{H_2}S$$    is

A. $$P{b^{2 + }}$$
B. $$C{u^ + }$$
C. $$A{g^ + }$$
D. $$S{n^{2 + }}$$
Releted Question 2

Which one among the following pairs of ions cannot be separated by $${H_2}S$$  in dilute hydrochloric acid?

A. $$B{i^{3 + }},S{n^{4 + }}$$
B. $$A{l^{3 + }},H{g^{2 + }}$$
C. $$Z{n^{2 + }},C{u^{2 + }}$$
D. $$N{i^{2 + }},C{u^{2 + }}$$
Releted Question 3

An aqueous solution contains $$H{g^{2 + }},Hg_2^{2 + },P{b^{2 + }}\,{\text{and}}\,C{d^{2 + }}.$$
The addition of $$HCl\left( {6N} \right)$$   will precipitate:

A. $$H{g_2}C{l_2}\,{\text{only}}$$
B. $$PbC{l_2}\,{\text{only}}$$
C. $$PbC{l_2}\,{\text{and}}\,H{g_2}C{l_2}$$
D. $$PbC{l_2}\,{\text{and}}\,HgC{l_2}$$
Releted Question 4

Identify the correct order of solubility of $$N{a_2}S,\,CuS\,{\text{and}}\,ZnS$$     in aqueous medium

A. $$CuS > ZnS > N{a_2}S$$
B. $$ZnS > N{a_2}S > CuS$$
C. $$N{a_2}S > CuS > ZnS$$
D. $$N{a_2}S > ZnS > CuS$$

Practice More Releted MCQ Question on
Qualitative Analysis


Practice More MCQ Question on Chemistry Section