Match the List-I with List-II : Cations Group reaction P → Pb 2 + , Cu 2 + H 2 S gas in presence of dilute HCl Q → Al 3 + , Fe 3 + NH 4 2 CO 3 in presence of NH 4 OH R → Co 2 + , Ni 2 + NH 4 OH in presence of NH 4 CI S → Ba 2 + , Ca 2 + H 2 S in presence of NH 4 OH

P → i , Q → iii , R → iv , S → ii

P → i , Q → iii , R → ii , S → iv

P → iv , Q → ii , R → iii , S → i

P → iii , Q → i , R → iv , S → ii

MEDIUM

JEE Main

IMPORTANT

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The sodium salt of an organic acid $X$ produces effervescence with concentrated $H_{2} {SO}_{4}$ . $X$ reacts with the acidified aqueous ${CaCl}_{2}$ solution to give a white precipitate which decolourises acidic solution of ${KMnO}_{4}$ . $X$ is

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Important Questions on Qualitative Analysis

EASY

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 27 July 2021 Shift 2>Q 8

To an aqueous solution containing ions such as

{Al}^{3 +}, {Zn}^{2 +}, {Ca}^{2 +}, {Fe}^{3 +}, {Ni}^{2 +}, {Ba}^{2 +}

and

{Cu}^{2 +}

was added

conc . HCl

, followed by

H_{2} S

. The total number of cations precipitated during this reaction is/are :

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 27 August 2021 Shift 1>Q 9

Acidic ferric chloride solution on treatment with excess of potassium ferrocyanide gives a Prussian blue coloured colloidal species. It is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 2 September 2020 Shift 1>Q 10

For the following Assertion and Reason, the correct option is

Assertion (A) : When $Cu$ (II) and sulphide ions are mixed, they react together extremely quickly to give a solid.

Reason (R) : The equilibrium constant of ${Cu}^{2 +} (aq) + S^{2 -} (aq) ⇌ CuS (s)$ is high because the solubility product is low.

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 16th April 2018>Q 11

The incorrect statement is:

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JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 15th April 2018>Q 12

A white sodium salt dissolves readily in water to give a solution which is neutral to litmus. When silver nitrate solution is added to the before mentioned solution, a white precipitate is obtained which does not dissolve in dilute nitric acid. The anion is:

HARD

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 10th April 2015>Q 13

An aqueous solution of a salt X turns blood red on treatment with

S C N^{-}

and blue on treatment with

K_{4} [F e {(C N)}_{6}]

, X also gives a positive chromyl chloride test. The salt X is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 10th April 2015>Q 14

The cation that will not be precipitated by

H_{2} S

in the presence of dil HCl is:

MEDIUM

JEE Main

IMPORTANT

EMBIBE CHAPTER WISE PREVIOUS YEAR PAPERS FOR CHEMISTRY>Chapter 21 - Qualitative Analysis>JEE Main - 24 June 2022 Shift 1>Q 15

During the qualitative analysis of salt with cation

y^{2 +}

, addition of a reagent

(X)

to alkaline solution of the salt gives a bright red precipitate. The reagent

(X)

and the cation

(y^{2 +})

present respectively are :

The sodium salt of an organic acid X produces effervescence with concentrated H2SO4. X reacts with the acidified aqueous CaCl2 solution to give a white precipitate which decolourises acidic solution of KMnO4. X is

Important Questions on Qualitative Analysis

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The sodium salt of an organic acid $X$ produces effervescence with concentrated $H_{2} {SO}_{4}$ . $X$ reacts with the acidified aqueous ${CaCl}_{2}$ solution to give a white precipitate which decolourises acidic solution of ${KMnO}_{4}$ . $X$ is