HARD

Earn 100

Describe the test of iodide ion in presence of dilute nitric acid and silver nitrate solution, followed by the addition of dilute ammonia solution and then concentrated ammonia solution.

Important Questions on Inorganic Qualitative Analysis

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Iodide 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:

MEDIUM

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

{HgCl}_{2}

and

I_{2}

both when dissolved in water containing

I^{-}

ions the pair of species formed is:

EASY

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

When

{CS}_{2}

layer containing both

{Br}_{2}

and

I_{2}

is shaken with excess of

{Cl}_{2}

water, the violet colour due to

I_{2}

disappears and a pale yellow colour appears in the solution. The disappearance of violet colour and appearance of pale yellow colour is due to the formation of :

MEDIUM

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

Working with a partner, discuss what you would see in a test tube in which concentrated sulfuric acid is added drop-wise to solid potassium iodide that you would not see if the acid was added to potassium chloride.

EASY

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

When

{CS}_{2}

layer containing both

{Br}_{2}

and

I_{2}

is shaken with excess of

{Cl}_{2}

water, the violet colour due to

I_{2}

disappears and orange colour due to

{Br}_{2}

appears. The disappearance of violet colour is due to the formation of

EASY

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

Mix of

NaI (s) + K_{2} {Cr}_{2} O_{7} (s) +

conc.

H_{2} {SO}_{4}

, when heated in a test tube dark vapours evolve is_____. (write name)

HARD

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

Ozone when reacts with potassium iodide solution liberates certain product, which turns starch paper blue. The liberated substance is.......

EASY

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

Starch can be used as an indicator for the detection of traces of

EASY

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

By the addition of which compound does the solubility of iodine in water increase?

MEDIUM

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

Write equations, including state symbols to describe the reactions taking place in the test tube between concentrated sulfuric acid and potassium iodide.

EASY

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

When dilute aqueous solution of

{AgNO}_{3}

excess is added to

KI

solution, positively charged sol of particles of

AgI

are formed due to adsorption of which ion?

EASY

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

Copy and complete the equation below, including state symbols.
${AgNO}_{3} (aq) + NaI (aq) \to$

EASY

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

Starch-iodide paper is used to test the presence of-

EASY

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

A salt gives violet vapours when treated with conc.

H_{2} S O_{4}

. It contains

MEDIUM

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

When Cl₂ water is added to an aqueous solution of potassium halide in presence of chloroform, a violet color is obtained. On adding more Cl₂ the violet color disappears and a colourless solution is obtained. This test confirms the presence of the following in aqueous solution.

EASY

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

Which salt on heating with conc.

H_{2} S O_{4}

gives violet vapours?

EASY

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

By the addition of which compound solubility of iodine in water increases

EASY

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

Cotyledons are also called-

Describe the test of iodide ion in presence of dilute nitric acid and silver nitrate solution, followed by the addition of dilute ammonia solution and then concentrated ammonia solution.

Important Questions on Inorganic Qualitative Analysis

Learn and Prepare for any exam you want !