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

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Important Questions on Inorganic Qualitative Analysis

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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:

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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

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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 $I_{2}$

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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:

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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)

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

Which combines with

{Fe}^{2 +}

to form brown complex?

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

Acidified potassium dichromate is treated with hydrogen sulphide. In the reaction, the oxidation number of chromium

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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 :

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

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

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

The incorrect statement is:

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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

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

Which of the following is not formed when H₂S reacts with acidic K₂Cr₂O₇ solution ?

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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:

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

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.

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

Write down the formula of the precipitate formed when

H_{2} S

gas is passed through an aqueous solution of silver nitrate.

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

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 :

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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:

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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:

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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

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

Important Questions on Inorganic Qualitative Analysis

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