Match List I with List II. List-I (Anion) List-II (gas evolved on reaction with dil. H 2 SO 4 ) (A) CO 3 2 - (I) Colourless gas which turns lead acetate paper black. (B) S 2 - (II) Colourless gas which turns acidified potassium dichromate solution green. (C) SO 3 2 - (III) Brown fumes which turns acidified KI solution containing starch blue. (D) NO 2 - (IV) Colourless gas evolved with brisk effervescence, which turns lime water milky. Choose the correct answer from the options given below

A - IV , B - I , C - II , D - III

A - III , B - I , C - II , D - IV

A - II , B - I , C - IV , D - III

A - IV , B - I , C - III , D - II

Distinguish between the following pair of compounds using a reagent as a chemical test: Magnesium chloride and magnesium nitrate solution.

Silver nitrate can be used to test chloride ion present in a compound thus magnesium chloride reacts with silver nitrate and forms a white precipitate of silver chloride and an aqueous solution of magnesium nitrate, but magnesium nitrate does not react with silver nitrate.

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The white precipitate formed in the reaction of lead acetate and sodium sulphate is .

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Important Questions on Inorganic Qualitative Analysis

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

When a mixture of

NaCl, K_{2} {Cr}_{2} O_{7}

and concentrated

H_{2} {SO}_{4}

is heated in a dry test tube, a red vapour

(X)

is evolved. This vapour

(X)

turns an aqueous solution of

NaOH

yellow due to the formation of

Y . X

and

Y,

respectively, are:

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

On heating, lead (ll) nitrate gives a brown gas (A). The gas (A) on cooling changes to a colourless solid/liquid (B). (B) on heating with NO changes to ablue solid (C). The oxidation number of nitrogen in solid (C) is:

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Sodium nitroprusside, when added to an alkaline solution of sulphide ions, produce a

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

A white precipitate was formed when

{BaCl}_{2}

was added to water extract of an inorganic salt. Further, a gas

' X'

with characteristic odour was released when the formed white precipitate was dissolved in dilute HCI. The anion present in the inorganic salt is:

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

A chloride salt solution acidified with dil.

{HNO}_{3}

gives a curdy white precipitate,

[A]

, on addition of

{AgNO}_{3}

. [A] on treatment with

{NH}_{4} OH

gives a clear solution, B.

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Match List I with List II.

	List-I (Anion)		List-II (gas evolved on reaction with dil. $H_{2} {SO}_{4}$ )
(A)	${CO}_{3}^{2 -}$	(I)	Colourless gas which turns lead acetate paper black.
(B)	$S^{2 -}$	(II)	Colourless gas which turns acidified potassium dichromate solution green.
(C)	${SO}_{3}^{2 -}$	(III)	Brown fumes which turns acidified KI solution containing starch blue.
(D)	${NO}_{2}^{-}$	(IV)	Colourless gas evolved with brisk effervescence, which turns lime water milky.

Choose the correct answer from the options given below

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Reaction of an inorganic sulphite

X

with dilute

H_{2} {SO}_{4}

generated compound

Y

. Reaction of

Y

with

NaOH

gives

X

. Further, the reaction of

X

with

Y

and water affords compound

Z, Y

and

X

, respectively, are :

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

The blue colour produced when a starch solution is added to a solution containing traces of $I_{2} and KI$ is due to

(I) formation of ${I_{3}}^{-}$

(II) formation of an inclusion complex

(III) Oxidation of starch

(IV) Oxidation of $I_{2}$

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral

{FeCl}_{3}

, it gave deep red colour which disappeared on boiling and a brown red ppt was formed. The mixture contains

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

The reagent(s) that can selectively precipitate

S^{2 -}

from a mixture of

S^{2 -}

and

S O_{4}^{2 -}

in aqueous solution is (are)

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

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:

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Which combines with

{Fe}^{2 +}

to form brown complex?

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

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

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

In the detection of II group acid radical, the salt containing chloride is treated with concentrated sulphuric acid, the colourless gas is liberated. The name of the gas is

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Consider the following reactions:

NaCl + K_{2} {Cr}_{2} O_{7} + \underset{(Conc.)}{H_{2} {SO}_{4}} \to (A) +

side products

(A) + N a O H \to (B) +

side products

(B) + \underset{(dilute)}{H_{2} S O_{4}} + H_{2} O_{2} \to (C) +

side products
The sum of the total number of atoms in one molecule each of

(A), (B)

and

(C)

is ________

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

{HgCl}_{2}

and

I_{2}

both when dissolved in water containing

I^{-}

ions the pair of species formed is:

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Distinguish between the following pair of compounds using a reagent as a chemical test:

Magnesium chloride and magnesium nitrate solution.

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

When treated with conc.

HCl, {MnO}_{2}

yields gas

(X)

which further reacts with

Ca {(OH)}_{2}

to generate a white solid

(Y)

reacts with dil.

HCl

to produce the same gas

X .

the solid

Y

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Sodium sulphate can be distinguished from sodium sulphite by using

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphate Ion

Name the anion present in compound B: When barium chloride solution is added to a solution of compound B, a white precipitate, insoluble in dilute hydrochloric acid, is obtained.

The white precipitate formed in the reaction of lead acetate and sodium sulphate is .

Important Questions on Inorganic Qualitative Analysis

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