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.

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 them gives Chromyl Chloride test with $K_{2} {Cr}_{2} O_{7} (s)$ and conc. $H_{2} {SO}_{4}$ ?

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Important Questions on Inorganic Qualitative Analysis

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

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

EASY

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

EASY

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

EASY

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

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

Magnesium chloride and magnesium nitrate solution.

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Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Chloride 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.

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Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Chloride 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 Chloride 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 ________

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

Which combines with

{Fe}^{2 +}

to form brown complex?

HARD

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

$KCl + concentrated H_{2} {SO}_{4} + K_{2} {Cr}_{2} O_{7} \overset{△}{\to} (X) \overset{NaOH}{\to} (Y)$ .

(X)

is reddish-brown coloured gas soluble in

NaOH

forming

(Y)

. What are

(X)

and

(Y)

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

Chromyl chloride vapours are dissolved in

N a O H

and acetic acid and lead acetate solution is added, then

Which of them gives Chromyl Chloride test with K2Cr2O7s and conc. H2SO4 ?

Important Questions on Inorganic Qualitative Analysis

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Which of them gives Chromyl Chloride test with $K_{2} {Cr}_{2} O_{7} (s)$ and conc. $H_{2} {SO}_{4}$ ?