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

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Mixture is heated with dil. $H_{2} S O_{4}$ and the lead acetate paper turns black by the evolved gases. The mixture contains

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Important Questions on Inorganic Qualitative Analysis

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphide 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:

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphide 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 Sulphide 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

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Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphide 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 $I_{2}$

EASY

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

Which combines with

{Fe}^{2 +}

to form brown complex?

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphide 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)

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphide 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 :

MEDIUM

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

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

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Sulphide 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 Sulphide 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

MEDIUM

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

{HgCl}_{2}

and

I_{2}

both when dissolved in water containing

I^{-}

ions the pair of species formed is:

MEDIUM

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

Which of the following doesn't give a ppt. with silver nitrate solution.

HARD

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

Consider the following statements and arrange in the order of true/false for the given statements respectively.

$S_{1} :$ Like $C O_{3}^{2 -}, S O_{3}^{2 -}$ ions also give test with baryta water, $Ba {(O H)}_{2} .$

$S_{2} : A g_{2} S$ is insoluble in hot and concentrated $HN O_{3} .$

$S_{3} :$ Triodide ions $(I_{3}^{-})$ produced by the reaction of $C u^{2 +}$ and KI solution are not reduced by excess of sodium thiosulphate solution.

$S_{4} :$ Black precipitate of $Cu {(S C N)}_{2}$ turns into white precipitate when it reacts with saturated solution of $S O_{2}$ in water.

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

Which of the following anions would decolourise acidified

K M n O_{4}

solution

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

Sometimes yellow turbidity appears on passing

H_{2} S

gas, even in the absence of the second group radicals. This happens because

MEDIUM

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

The equivalent masses of

N a_{2} C O_{3}

when it is titrated with

H C l

using phenolphthalein and methyl orange separate experiments are

EASY

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

Water-soluble mixture

\to_{(ii) Filter}^{(i) {BaCl}_{2}}

white ppt.

Filtrate + (hot and conc.) HNO₃ + BaCl₂

\to

white ppt. So, the mixture contains

Mixture is heated with dil. H2SO4 and the lead acetate paper turns black by the evolved gases. The mixture contains

Important Questions on Inorganic Qualitative Analysis

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Mixture is heated with dil. $H_{2} S O_{4}$ and the lead acetate paper turns black by the evolved gases. The mixture contains