37406
Which mixture is separated by conc. aqueous solution of sodium hydroxide
1 \(Al^{3+}\) and \(Sn^{2+}\)
2 \(Al^{3+}\) and \(Fe^{3+}\)
3 \(Al^{3+}\) and \(Zn^{2+}\)
4 \(Zn^{2+}\) and \(Pb^{2+}\)
Explanation:
\(NaOH + Al ^{+3} \rightarrow NaAlO _2\) \(NaOH + Fe ^{+3} \rightarrow\) No reaction (Insoluble in \(NaOH\) )
PRACTICAL CHEMISTRY
37346
An aqueous solution of an inorganic salt on treatment with \(HCl\) gives a white precipitate. This solution contains
1 \({Hg_2}^{2+}\)
2 \(Hg^{2+}\)
3 \(Zn^{2+}\)
4 \(Cd^{2+}\)
Explanation:
\(Hg _2^{2+}\) will produce white ppt with dil \(HCl\). \(Hg _2^{+2}+2 HCl \longrightarrow \underset{\text { White ppt }}{Hg _2 Cl _2 \downarrow}+2 H ^{+}\) This precipitation is possible due to very low value of the solubility products.
PRACTICAL CHEMISTRY
37347
Lead sulphate is soluble
1 In conc. nitric acid
2 In conc. hydrochloric acid
3 In a solution of ammonium acetate
4 In water
Explanation:
Lead sulphate is solube in a solution of ammonium acetate. because the \(rx^n\), \(Pb _4\left( SO _4\right)_2+ \xrightarrow{Ammonium\,\,\,acetate}\) lead acetate $+$ Ammonium sulphate
PRACTICAL CHEMISTRY
37348
Which one of the following sulphides is yellow
1 Zinc sulphide
2 Cadmium sulphide
3 Nickel sulphide
4 Lead sulphide
Explanation:
The color of the sulphides are as follows \(CdS:\) yellow color \(ZnS:\) White color when puse and black if impuse \(PbS\) and \(NiS:\) Black color.
PRACTICAL CHEMISTRY
37349
When \(H_2S\) gas is passed through the \(HCl\) containing aqueous solutions of \(CuCl_2\), \(HgCl_2\), \(BiCl_3\) and \(CoCl_2\), which does not precipitate out
1 \(CuS\)
2 \(HgS\)
3 \(Bi_2S_3\)
4 \(CoS\)
Explanation:
(d) Cobalt sulphide does not ppt. in second group.
37406
Which mixture is separated by conc. aqueous solution of sodium hydroxide
1 \(Al^{3+}\) and \(Sn^{2+}\)
2 \(Al^{3+}\) and \(Fe^{3+}\)
3 \(Al^{3+}\) and \(Zn^{2+}\)
4 \(Zn^{2+}\) and \(Pb^{2+}\)
Explanation:
\(NaOH + Al ^{+3} \rightarrow NaAlO _2\) \(NaOH + Fe ^{+3} \rightarrow\) No reaction (Insoluble in \(NaOH\) )
PRACTICAL CHEMISTRY
37346
An aqueous solution of an inorganic salt on treatment with \(HCl\) gives a white precipitate. This solution contains
1 \({Hg_2}^{2+}\)
2 \(Hg^{2+}\)
3 \(Zn^{2+}\)
4 \(Cd^{2+}\)
Explanation:
\(Hg _2^{2+}\) will produce white ppt with dil \(HCl\). \(Hg _2^{+2}+2 HCl \longrightarrow \underset{\text { White ppt }}{Hg _2 Cl _2 \downarrow}+2 H ^{+}\) This precipitation is possible due to very low value of the solubility products.
PRACTICAL CHEMISTRY
37347
Lead sulphate is soluble
1 In conc. nitric acid
2 In conc. hydrochloric acid
3 In a solution of ammonium acetate
4 In water
Explanation:
Lead sulphate is solube in a solution of ammonium acetate. because the \(rx^n\), \(Pb _4\left( SO _4\right)_2+ \xrightarrow{Ammonium\,\,\,acetate}\) lead acetate $+$ Ammonium sulphate
PRACTICAL CHEMISTRY
37348
Which one of the following sulphides is yellow
1 Zinc sulphide
2 Cadmium sulphide
3 Nickel sulphide
4 Lead sulphide
Explanation:
The color of the sulphides are as follows \(CdS:\) yellow color \(ZnS:\) White color when puse and black if impuse \(PbS\) and \(NiS:\) Black color.
PRACTICAL CHEMISTRY
37349
When \(H_2S\) gas is passed through the \(HCl\) containing aqueous solutions of \(CuCl_2\), \(HgCl_2\), \(BiCl_3\) and \(CoCl_2\), which does not precipitate out
1 \(CuS\)
2 \(HgS\)
3 \(Bi_2S_3\)
4 \(CoS\)
Explanation:
(d) Cobalt sulphide does not ppt. in second group.
37406
Which mixture is separated by conc. aqueous solution of sodium hydroxide
1 \(Al^{3+}\) and \(Sn^{2+}\)
2 \(Al^{3+}\) and \(Fe^{3+}\)
3 \(Al^{3+}\) and \(Zn^{2+}\)
4 \(Zn^{2+}\) and \(Pb^{2+}\)
Explanation:
\(NaOH + Al ^{+3} \rightarrow NaAlO _2\) \(NaOH + Fe ^{+3} \rightarrow\) No reaction (Insoluble in \(NaOH\) )
PRACTICAL CHEMISTRY
37346
An aqueous solution of an inorganic salt on treatment with \(HCl\) gives a white precipitate. This solution contains
1 \({Hg_2}^{2+}\)
2 \(Hg^{2+}\)
3 \(Zn^{2+}\)
4 \(Cd^{2+}\)
Explanation:
\(Hg _2^{2+}\) will produce white ppt with dil \(HCl\). \(Hg _2^{+2}+2 HCl \longrightarrow \underset{\text { White ppt }}{Hg _2 Cl _2 \downarrow}+2 H ^{+}\) This precipitation is possible due to very low value of the solubility products.
PRACTICAL CHEMISTRY
37347
Lead sulphate is soluble
1 In conc. nitric acid
2 In conc. hydrochloric acid
3 In a solution of ammonium acetate
4 In water
Explanation:
Lead sulphate is solube in a solution of ammonium acetate. because the \(rx^n\), \(Pb _4\left( SO _4\right)_2+ \xrightarrow{Ammonium\,\,\,acetate}\) lead acetate $+$ Ammonium sulphate
PRACTICAL CHEMISTRY
37348
Which one of the following sulphides is yellow
1 Zinc sulphide
2 Cadmium sulphide
3 Nickel sulphide
4 Lead sulphide
Explanation:
The color of the sulphides are as follows \(CdS:\) yellow color \(ZnS:\) White color when puse and black if impuse \(PbS\) and \(NiS:\) Black color.
PRACTICAL CHEMISTRY
37349
When \(H_2S\) gas is passed through the \(HCl\) containing aqueous solutions of \(CuCl_2\), \(HgCl_2\), \(BiCl_3\) and \(CoCl_2\), which does not precipitate out
1 \(CuS\)
2 \(HgS\)
3 \(Bi_2S_3\)
4 \(CoS\)
Explanation:
(d) Cobalt sulphide does not ppt. in second group.
37406
Which mixture is separated by conc. aqueous solution of sodium hydroxide
1 \(Al^{3+}\) and \(Sn^{2+}\)
2 \(Al^{3+}\) and \(Fe^{3+}\)
3 \(Al^{3+}\) and \(Zn^{2+}\)
4 \(Zn^{2+}\) and \(Pb^{2+}\)
Explanation:
\(NaOH + Al ^{+3} \rightarrow NaAlO _2\) \(NaOH + Fe ^{+3} \rightarrow\) No reaction (Insoluble in \(NaOH\) )
PRACTICAL CHEMISTRY
37346
An aqueous solution of an inorganic salt on treatment with \(HCl\) gives a white precipitate. This solution contains
1 \({Hg_2}^{2+}\)
2 \(Hg^{2+}\)
3 \(Zn^{2+}\)
4 \(Cd^{2+}\)
Explanation:
\(Hg _2^{2+}\) will produce white ppt with dil \(HCl\). \(Hg _2^{+2}+2 HCl \longrightarrow \underset{\text { White ppt }}{Hg _2 Cl _2 \downarrow}+2 H ^{+}\) This precipitation is possible due to very low value of the solubility products.
PRACTICAL CHEMISTRY
37347
Lead sulphate is soluble
1 In conc. nitric acid
2 In conc. hydrochloric acid
3 In a solution of ammonium acetate
4 In water
Explanation:
Lead sulphate is solube in a solution of ammonium acetate. because the \(rx^n\), \(Pb _4\left( SO _4\right)_2+ \xrightarrow{Ammonium\,\,\,acetate}\) lead acetate $+$ Ammonium sulphate
PRACTICAL CHEMISTRY
37348
Which one of the following sulphides is yellow
1 Zinc sulphide
2 Cadmium sulphide
3 Nickel sulphide
4 Lead sulphide
Explanation:
The color of the sulphides are as follows \(CdS:\) yellow color \(ZnS:\) White color when puse and black if impuse \(PbS\) and \(NiS:\) Black color.
PRACTICAL CHEMISTRY
37349
When \(H_2S\) gas is passed through the \(HCl\) containing aqueous solutions of \(CuCl_2\), \(HgCl_2\), \(BiCl_3\) and \(CoCl_2\), which does not precipitate out
1 \(CuS\)
2 \(HgS\)
3 \(Bi_2S_3\)
4 \(CoS\)
Explanation:
(d) Cobalt sulphide does not ppt. in second group.
37406
Which mixture is separated by conc. aqueous solution of sodium hydroxide
1 \(Al^{3+}\) and \(Sn^{2+}\)
2 \(Al^{3+}\) and \(Fe^{3+}\)
3 \(Al^{3+}\) and \(Zn^{2+}\)
4 \(Zn^{2+}\) and \(Pb^{2+}\)
Explanation:
\(NaOH + Al ^{+3} \rightarrow NaAlO _2\) \(NaOH + Fe ^{+3} \rightarrow\) No reaction (Insoluble in \(NaOH\) )
PRACTICAL CHEMISTRY
37346
An aqueous solution of an inorganic salt on treatment with \(HCl\) gives a white precipitate. This solution contains
1 \({Hg_2}^{2+}\)
2 \(Hg^{2+}\)
3 \(Zn^{2+}\)
4 \(Cd^{2+}\)
Explanation:
\(Hg _2^{2+}\) will produce white ppt with dil \(HCl\). \(Hg _2^{+2}+2 HCl \longrightarrow \underset{\text { White ppt }}{Hg _2 Cl _2 \downarrow}+2 H ^{+}\) This precipitation is possible due to very low value of the solubility products.
PRACTICAL CHEMISTRY
37347
Lead sulphate is soluble
1 In conc. nitric acid
2 In conc. hydrochloric acid
3 In a solution of ammonium acetate
4 In water
Explanation:
Lead sulphate is solube in a solution of ammonium acetate. because the \(rx^n\), \(Pb _4\left( SO _4\right)_2+ \xrightarrow{Ammonium\,\,\,acetate}\) lead acetate $+$ Ammonium sulphate
PRACTICAL CHEMISTRY
37348
Which one of the following sulphides is yellow
1 Zinc sulphide
2 Cadmium sulphide
3 Nickel sulphide
4 Lead sulphide
Explanation:
The color of the sulphides are as follows \(CdS:\) yellow color \(ZnS:\) White color when puse and black if impuse \(PbS\) and \(NiS:\) Black color.
PRACTICAL CHEMISTRY
37349
When \(H_2S\) gas is passed through the \(HCl\) containing aqueous solutions of \(CuCl_2\), \(HgCl_2\), \(BiCl_3\) and \(CoCl_2\), which does not precipitate out
1 \(CuS\)
2 \(HgS\)
3 \(Bi_2S_3\)
4 \(CoS\)
Explanation:
(d) Cobalt sulphide does not ppt. in second group.
