Some pale-green crystals are strongly heated. The gases given off are passed into a container surrounded by ice and then through a solution of acidified KMnO 4 . The KMnO 4 is decolorized, a waxy white solid is formed in the ice container ; this is dissolved in water. The solution will :

Give a precipitate with barium chloride solution

Give a precipitate with copper sulphate solution

Give blue color with starch solution

MEDIUM

Earn 100

Describe the test of calcium ion with sodium hydroxide.

Important Questions on In the Lab

HARD

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

A metal M and its compound can given the following observed changes in a conseqquence of reaction,

M \to_{{HNO}_{3}}^{Dil} [Colourless solution] \overset{aq NaOH}{\to} [White ppt] \overset{\underset{aq NaOH}{excess}}{\to} [Colourless solution] \overset{H_{2} S}{\to} [White ppt]

then metal M will be

HARD

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

An aqueous solution of colourless metal sulphate

M

, gives a white precipitate with

N a O H

. This was soluble in excess of

N a O H

. On passing

H_{2} S

through this solution a white precipitate is formed. The metal

M

in the salt is:

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Some reactions are given for salt(X).

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

EASY

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

When

B a C l_{2}

is added to an aqueous salt solution, a white precipitate is obtained. The anion among

C O_{3}^{2 -}, S O_{3}^{2 -}

and

S O_{4}^{2 -}

that was present in the solution can be

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

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

EASY

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

On adding excess of ammonium hydroxide to a copper sulphate solution

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

A solution containing sulphite and sulphate ion can be easily distinguished by

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Zinc on reaction with NaOH gives a salt A along with a gas X and A on reaction with a gas Y gives white precipitate W. Which of the following is correct ?

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

When

C O_{2}

is passed into lime water it turns milky. When excess of

C O_{2}

is passed, milkyness disappears because

HARD

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Which reagent below would enable you to remove sulphate ions from a solution containing both sulphate and chloride ions

HARD

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Some pale-green crystals are strongly heated. The gases given off are passed into a container surrounded by ice and then through a solution of acidified KMnO₄. The KMnO₄ is decolorized, a waxy white solid is formed in the ice container ; this is dissolved in water.
The solution will :

HARD

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Which of the following will not produce a precipitate with

{AgNO}_{3}

solution?

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Which of the following pairs would be expected to form precipitate when solution are mixed

EASY

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

{Z n C l}_{2}

reacts with excess of

{N H}_{3}

solution to produce which of the folloing?

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

An organic compound is boiled with

{HNO}_{3}

, cooled and then treated with

{AgNO}_{3}

, a white precipitate is obtained. The compound can be

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

On addition of aqueous

N a O H

to a salt solution, a white gelatinous precipitate is formed, which dissolves in excess alkali. The salt solution contains

HARD

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

A solution of colourless salt H on boiling with excess NaOH produces a non-flammable gas. The gas evolution ceases after sometime upon addition of Zn dust to the same solution, the gas evolution restarts. The colourless salt(s) H is (are):

MEDIUM

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Saturated solution of

{SO}_{2}

is heated at

150 ° C

in a closed container. The product obtained is treated with

{BaCl}_{2}

solution. What is/are the most suitable observation(s)?

EASY

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Which of the following doesn't give a ppt. with silver nitrate solution.

EASY

Chemistry>Inorganic Chemistry>In the Lab>Testing for Ions in the Lab

Solution of II A group precipitate in dil.

H N O_{3}

when treated with

N H_{4} O H

becomes blue because of the presence of

Describe the test of calcium ion with sodium hydroxide.

Important Questions on In the Lab

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