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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If we use phenolphthalein as an indicator in a titration of $N a_{2} C O_{3}$ with $H C l,$ the usual result is

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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:

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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

HARD

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

In an acid-base titration,

0.1 M H C l

solution was added to the

N a O H

solution of unknown strength. Which of the following correctly shown the change of

p H

of the titration mixture in this experiment?
Question Image

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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:

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

Which combines with

{Fe}^{2 +}

to form brown complex?

HARD

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

The Plot of

pH

-metric titration of weak base

{NH}_{4} OH

vs strong acid

HCl

looks like

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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

100 mL

0.1 M HCl

is taken in a beaker and to it

100 mL

0.1 M NaOH

of is added in steps of

2 mL

and the

pH

is continuously measured. Which of the following graphs correctly depicts the change in

pH

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

In base vs. Acid titration, at the end point methyl orange is present as

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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:

HARD

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

A compound '

X

' is a weak acid and it exhibits colour change at

pH

close to the equivalence point during neutralization of

NaOH

with

{CH}_{3} COOH

. Compound '

X

' exists in ionized form in basic medium. The compound '

X

' is

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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 $I_{2}$

HARD

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:

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

A brown ring appears in the test for

If we use phenolphthalein as an indicator in a titration of Na2CO3 with HCl, the usual result is

Important Questions on Inorganic Qualitative Analysis

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If we use phenolphthalein as an indicator in a titration of $N a_{2} C O_{3}$ with $H C l,$ the usual result is