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.

Unknown salt ' A ' + K 2 Cr 2 O 7 + concentrated H 2 SO 4 → Reddish brown fumes. Which is the correct statement regarding the above observation.

It neither confirms Cl - nor Br - unless it is passed through NaOH solution.

It confirms the presence of Cl - ion.

It confirms the presence of Br ion.

It confirms the presence of both.

HARD

Earn 100

Write the reaction of chromyl chloride with sodium hydroxide.

Important Questions on Inorganic Qualitative Analysis

MEDIUM

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.

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

MEDIUM

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 ________

MEDIUM

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

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 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

MEDIUM

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

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

Magnesium chloride and magnesium nitrate solution.

HARD

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

Which of the following compound will give white precipitate on heating with

{HNO}_{3}

followed by addition of silver nitrate?

HARD

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

Unknown salt

'A' + K_{2} {Cr}_{2} O_{7} + {Conc. H}_{2} {SO}_{4} \to Reddish brown fumes

. Which is the correct statement regarding the above observation?

HARD

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

When a white crystalline compound

x

is heated with

K_{2} {Cr}_{2} O_{7}

and concentrated

H_{2} {SO}_{4},

a reddish-brown gas

A

is evolved. On passing

A

into caustic soda solution a yellow coloured solution of

B

is obtained. Neutralising the solution of

B

with acetic acid and on subsequent addition of lead acetate, a yellow precipitate

C

is obtained. When

x

is heated with

NaOH

solution, a colourless gas is evolved and on passing this gas into

K_{2} {HgI}_{2}

solution, a reddish-brown precipitate

D

is formed. Identify

A, B, C, D

and

x

. Write the equations of all the reactions involved.

EASY

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

A black compound of manganese reacts with a halogen acid to give greenish-yellow gas. When an excess of this gas reacts with

{NH}_{3}

an unstable trihalide is formed. In this process, the oxidation state of nitrogen changes from

HARD

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

Unknown salt

' A'

+ K_{2} {Cr}_{2} O_{7} +

concentrated

H_{2} {SO}_{4} \to

Reddish
brown fumes. Which is the correct statement regarding the above observation.

MEDIUM

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

Some reactions are given for salt(X).

Which of the following salt can be satisfied all the conditions?

HARD

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

What will be the formula and colour of

' X'

in the following reaction?

Question Image

HARD

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 solution, a white precipitate is formed which does not dissolve in dilute nitric acid. The anion could be

HARD

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

Which of the following statement (s) is(are) correct when a mixture of NaCl and K₂Cr₂O₇ is gently warmed with conc. H₂SO₄?

MEDIUM

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)

MEDIUM

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

Aqueous solution of a salt when treated with

A g N O_{3}

solution gives a white precipitate, which dissolves in dilute

N H_{4} O H

. Radical present in the salt is

Write the reaction of chromyl chloride with sodium hydroxide.

Important Questions on Inorganic Qualitative Analysis

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