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.

Which of the following statements is incorrect when a mixture of NaCl and K 2 Cr 2 O 7 is strongly heated with conc. H 2 SO 4 ?

Deep red orange coloured vapours are evolved

The vapour when passed into NaOH solution gives yellow solution of Na 2 CrO 4

MEDIUM

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The black powder which gives greenish-yellow gas when heated with concentrated hydrochloric acid is:

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Important Questions on Inorganic Qualitative Analysis

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

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 ________

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

Which combines with

{Fe}^{2 +}

to form brown complex?

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.

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:

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

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

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

The salt which will not give positive chromyl chloride test is

MEDIUM

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

When NaCl, is heated with solid K₂Cr₂O₇ & Conc. H₂SO₄ the vapours obtained is

HARD

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

Which of the following sodium salts, on heating with solid

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

and concentrated

H_{2} {SO}_{4}

, gives red vapour?

EASY

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

Identify the substance A from the following observations:

Substance (A) is water insoluble, on bubbling ${Cl}_{2}$ through its suspension in water, it produces a coloured aqueous solution, forming a single product.

MEDIUM

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

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

Which of the following statements is incorrect when a mixture of NaCl and K₂Cr₂O₇ is strongly heated with conc. H₂SO₄ ?

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

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

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?

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

The black powder which gives greenish-yellow gas when heated with concentrated hydrochloric acid is:

Important Questions on Inorganic Qualitative Analysis

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