Test: Single Correct MCQs: Analytical Chemistry | JEE Advanced

Question 1

The ion that cannot be precipitated by both HCl and H₂S is

Accepted Answer

Sn2+

Answer

Pb2+

Answer

Cu⁺ (1982 - 1 Mark)

Answer

Ag+

Question 2

Which one among the following pairs of ions cannot be separated by H₂S in dilute hydrochloric acid? (1986 - 1 Mark)

Accepted Answer

Bi³⁺, Sn⁴⁺

Answer

Al³⁺, Hg²⁺

Answer

Zn²⁺, Cu²⁺

Answer

Ni²⁺, Cu²⁺

Question 3

An aqueous solution contains Hg²⁺, Hg₂²⁺, Pb²⁺ and Cd²⁺.The addition of HCl (6N) will precipitate : (1995S)

Accepted Answer

PbCl₂ and Hg₂Cl₂

Answer

Hg₂Cl₂ only

Answer

PbCl₂ only

Answer

PbCl₂ and HgCl₂

Question 4

Identify the correct order of solubility of Na₂S, CuS and ZnS in aqueous medium (2002S)

Accepted Answer

Na₂S > ZnS > CuS

Answer

CuS > ZnS > Na₂S

Answer

ZnS > Na₂S > CuS

Answer

Na₂S > CuS > ZnS

Question 5

An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulfide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a (2002S)

Accepted Answer

Pb²⁺ salt

Answer

Hg₂²⁺ salt

Answer

Cu²⁺ salt

Answer

Ag+ salt

Question 6

A gas 'X' is passed th rough water to form a satur ated 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' and 'Y'. (2002S)

Accepted Answer

X = Cl₂, Y = H₂

Answer

X = CO₂, Y = Cl₂

Answer

X = Cl₂, Y = CO₂

Answer

X = H₂, Y = Cl₂

Question 7

[X] + H₂SO₄ —→ [Y] a colourless gas with irritating smell, [Y] + K₂Cr₂O₇ + H₂SO₄ —→ green solution. [X] and [Y] are:(2003S)

Accepted Answer

SO₃^2–, SO₂

Answer

Cl^– ,HCl

Answer

S^2–, H₂S

Answer

CO₃^2–, CO₂

Question 8

A solution which is 10^-3M each in Mn²⁺, Fe²⁺, Zn²⁺ and Hg²⁺ is treated with 10^-16 M sulphide ion. If K_sp of MnS, FeS, ZnS and HgS are 10^-15, 10^-23, 10^-20 and 10^-54 respectively, which one will precipitate first? (2003S)

Accepted Answer

HgS

Answer

FeS

Answer

MgS

Answer

ZnS

Question 9

A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI is converted into orange colour solution. The cation of the metal nitrate is (2005S)

Accepted Answer

Bi3+

Answer

Hg2+

Answer

Pb2+

Answer

Cu+

Question 10

A solution when diluted with H₂O and boiled, gives a white precipitate. On addition of excess NH₄Cl/NH₄OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which disolves in NH₄OH/NH₄Cl (2006 - 3M, –1)

Accepted Answer

Zn(OH)2

Answer

Al (OH)3

Answer

Ca(OH)2

Answer

Mg(OH)2

Question 11

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is (2007)

Accepted Answer

Hg2+

Answer

Pb2+

Answer

Cu2+

Answer

Co2+

Question 12

Passing H₂S gas into a mixture of Mn²⁺, Ni²⁺, Cu²⁺ and Hg²⁺ ions in an acidified aqueous solution precipitates (2011)

Accepted Answer

CuS and HgS

Answer

MnS and CuS

Answer

MnS and NiS

Answer

NiS and HgS

Question 13

Upon treatment with ammoniacal H₂S, the metalion that precipitates as a sulfide is (JEE Adv. 2013)

Accepted Answer

Zn(II)

Answer

Fe(III)

Answer

Al(III)

Answer

Mg(II)

Analytical Chemistry | JEE Advanced - Free MCQ Practice Test with solutions,

MCQ Practice Test & Solutions: Test: Single Correct MCQs: Analytical Chemistry | JEE Advanced (13 Questions)

The ion that cannot be precipitated by both HCl and H₂S is

Which one among the following pairs of ions cannot be separated by H₂S in dilute hydrochloric acid? (1986 - 1 Mark)

An aqueous solution contains Hg²⁺, Hg₂²⁺, Pb²⁺ and Cd²⁺.The addition of HCl (6N) will precipitate : (1995S)

Identify the correct order of solubility of Na₂S, CuS and ZnS in aqueous medium (2002S)

An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulfide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a (2002S)

A gas 'X' is passed th rough water to form a satur ated 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' and 'Y'. (2002S)

[X] + H₂SO₄ —→ [Y] a colourless gas with irritating smell, [Y] + K₂Cr₂O₇ + H₂SO₄ —→ green solution. [X] and [Y] are:(2003S)

A solution which is 10^-3M each in Mn²⁺, Fe²⁺, Zn²⁺ and Hg²⁺ is treated with 10^-16 M sulphide ion. If K_sp of MnS, FeS, ZnS and HgS are 10^-15, 10^-23, 10^-20 and 10^-54 respectively, which one will precipitate first? (2003S)

A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI is converted into orange colour solution. The cation of the metal nitrate is (2005S)

A solution when diluted with H₂O and boiled, gives a white precipitate. On addition of excess NH₄Cl/NH₄OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which disolves in NH₄OH/NH₄Cl (2006 - 3M, –1)

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is (2007)

Passing H₂S gas into a mixture of Mn²⁺, Ni²⁺, Cu²⁺ and Hg²⁺ ions in an acidified aqueous solution precipitates (2011)

Upon treatment with ammoniacal H₂S, the metalion that precipitates as a sulfide is (JEE Adv. 2013)

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Analytical Chemistry | JEE Advanced - Free MCQ Practice Test with solutions,

MCQ Practice Test & Solutions: Test: Single Correct MCQs: Analytical Chemistry | JEE Advanced (13 Questions)

The ion that cannot be precipitated by both HCl and H2S is

Which one among the following pairs of ions cannot be separated by H2S in dilute hydrochloric acid? (1986 - 1 Mark)

An aqueous solution contains Hg2+, Hg22+, Pb2+ and Cd2+.The addition of HCl (6N) will precipitate : (1995S)

Identify the correct order of solubility of Na2S, CuS and ZnS in aqueous medium (2002S)

An aqueous solution of a substance gives a white precipitate on treatment with dilute hydrochloric acid, which dissolves on heating. When hydrogen sulfide is passed through the hot acidic solution, a black precipitate is obtained. The substance is a (2002S)

A gas 'X' is passed th rough water to form a satur ated 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' and 'Y'. (2002S)

[X] + H2SO4 —→ [Y] a colourless gas with irritating smell, [Y] + K2Cr2O7 + H2SO4 —→ green solution. [X] and [Y] are:(2003S)

A solution which is 10-3 M each in Mn2+, Fe2+, Zn2+ and Hg2+ is treated with 10-16 M sulphide ion. If Ksp of MnS, FeS, ZnS and HgS are 10-15, 10-23, 10-20 and 10-54 respectively, which one will precipitate first? (2003S)

A metal nitrate reacts with KI to give a black precipitate which on addition of excess of KI is converted into orange colour solution. The cation of the metal nitrate is (2005S)

A solution when diluted with H2O and boiled, gives a white precipitate. On addition of excess NH4Cl/NH4OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which disolves in NH4OH/NH4Cl (2006 - 3M, –1)

A solution of a metal ion when treated with KI gives a red precipitate which dissolves in excess KI to give a colourless solution. Moreover, the solution of metal ion on treatment with a solution of cobalt (II) thiocyanate gives rise to a deep blue crystalline precipitate. The metal ion is (2007)

Passing H2S gas into a mixture of Mn2+, Ni2+, Cu2+ and Hg2+ ions in an acidified aqueous solution precipitates (2011)

Upon treatment with ammoniacal H2S, the metalion that precipitates as a sulfide is (JEE Adv. 2013)

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About this JEE Practice Test

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The ion that cannot be precipitated by both HCl and H₂S is

Which one among the following pairs of ions cannot be separated by H₂S in dilute hydrochloric acid? (1986 - 1 Mark)

An aqueous solution contains Hg²⁺, Hg₂²⁺, Pb²⁺ and Cd²⁺.The addition of HCl (6N) will precipitate : (1995S)

Identify the correct order of solubility of Na₂S, CuS and ZnS in aqueous medium (2002S)

[X] + H₂SO₄ —→ [Y] a colourless gas with irritating smell, [Y] + K₂Cr₂O₇ + H₂SO₄ —→ green solution. [X] and [Y] are:(2003S)

A solution which is 10^-3M each in Mn²⁺, Fe²⁺, Zn²⁺ and Hg²⁺ is treated with 10^-16 M sulphide ion. If K_sp of MnS, FeS, ZnS and HgS are 10^-15, 10^-23, 10^-20 and 10^-54 respectively, which one will precipitate first? (2003S)

A solution when diluted with H₂O and boiled, gives a white precipitate. On addition of excess NH₄Cl/NH₄OH, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which disolves in NH₄OH/NH₄Cl (2006 - 3M, –1)

Passing H₂S gas into a mixture of Mn²⁺, Ni²⁺, Cu²⁺ and Hg²⁺ ions in an acidified aqueous solution precipitates (2011)

Upon treatment with ammoniacal H₂S, the metalion that precipitates as a sulfide is (JEE Adv. 2013)