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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Which of the following carbonates do not give metal oxide on heating?

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Important Questions on Inorganic Qualitative Analysis

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

Which combines with

{Fe}^{2 +}

to form brown complex?

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

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Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Carbonate 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 Carbonate 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 Carbonate 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 Carbonate 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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{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 Carbonate 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 Carbonate Ion

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Then A may have:

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

Name the anion present in compounds C: The action of heat on the insoluble compound C produces a gas which turns lime water turbid.

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

A dilute aqueous solution of a sodium salt forms white precipitate with

{MgCl}_{2}

, only after boiling. The anion of the sodium salt is :

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

When we add dilute sulphuric acid to salt, brisk effervescence is observed then the possible anion is carbonate.

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N a_{2} C O_{3}

cannot be used to identify

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

{CO}_{3}^{2 -}

and

{HCO}_{3}^{-}

can be distinguished by

Which of the following carbonates do not give metal oxide on heating?

Important Questions on Inorganic Qualitative Analysis

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