Copy and complete the following table: Compound Solubility in sodium Hydroxide Solubility in Ammonium Hydroxide Copper ( I I ) hydroxide Aluminium hydroxide Zinc hydroxide

Compound Solubility is sodium hydroxide Solubility in ammonium hydroxide Copper(II)hydroxide Insoluble Soluble Copper(II) hydroxide does not react with sodium hydroxide and form any salt hence it is insoluble in sodium hydroxide. But Copper(II) hydroxide reacts with ammonium hydroxide and forms a salt which is soluble. Compound Solubility is sodium hydroxide Solubility in ammonium hydroxide Aluminium hydroxide Soluble Insoluble Aluminium hydroxide is amphoteric in nature, it reacts with sodium hydroxide and forms a salt of sodium aluminate and water. Sodium aluminate is a soluble salt. It does not react with ammonium hydroxide hence remains insoluble. Compound Solubility is sodium hydroxide Solubility in ammonium hydroxide Zinc hydroxide Soluble Soluble When sodium hydroxide is added to zinc hydroxide, the precipitate of zinc hydroxide will dissolve, forming a colourless solution of zincate ion. Zinc hydroxide also dissolves in excess ammonium hydroxide to form a colourless, water-soluble ammine complex.

Name the product formed by the reaction of Al3 with sodium hydroxide

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

A solution of

{CrO}_{5}

in amyl alcohol has a....colour

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

In the group III radicals, in place of

N H_{4} C l

which of the following can be used

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

An inorganic Lewis acid $(X)$ shows in the reaction:
It fumes in moist air:The intensity of fumes increases when a rod dipped in ${NH}_{4} OH$ is brought near it.An acidic solution of $(X)$ on addition of ${NH}_{4} Cl$ and ${NH}_{4} OH$ gives a precipitate which dissolves in $NaOH$ solution:An acidic solution of $(X)$ does not give precipitate with $H_{2} S$ . Identify $(X)$ and give chemical equations for reactions at steps $(i)$ to $(iii)$ .

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

When NH₄Cl is not used together with NH₄OH in group-III reagent which of the following cation will not be precipitated ?

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

Ethers get oxidised in the presence of air after a long time.The presence of peroxide ion can be detected ferrous ions followd by the addition of-

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

An aqueous solution of

{FeSO}_{4}, {Al}_{2} {({SO}_{4})}_{3}

and chrome alum is heated with excess of

{Na}_{2} O_{2}

and filtered. The materials obtained are

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

An inorganic Lewis acid $(X)$ shows in the reaction:
It fumes in moist air:The intensity of fumes increases when a rod dipped in ${NH}_{4} OH$ is brought near it.An acidic solution of $(X)$ on addition of ${NH}_{4} Cl$ and ${NH}_{4} OH$ gives a precipitate which dissolves in $NaOH$ solution:An acidic solution of $(X)$ does not give precipitate with $H_{2} S$ . Identify $(X)$ and give chemical equations for reactions at steps $(i)$ to $(iii)$ .

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

How do you differentiate between

{Fe}^{3 +}

and

{Cr}^{3 +}

in group

III

?

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

The reagents

N H_{4} C l

and aqueous

N H_{3}

will precipitate

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

Which of the following mixtures of ions can be separated by using an excess of NaOH solution ?

HARD

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

The sequential unknown reagents is / are :

MEDIUM

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

Copy and complete the following table:

Compound	Solubility in sodium Hydroxide	Solubility in Ammonium Hydroxide
Copper $(I I)$ hydroxide
Aluminium hydroxide
Zinc hydroxide

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

Which one of the following metals will give blue ash when its salt is heated with

N a_{2} C O_{3}

solid and

C o {(N O_{3})}_{2}

on a charcoal piece

EASY

Chemistry>Practical Chemistry>Inorganic Qualitative Analysis>Tests for Aluminium(III) Ion

An inorganic Lewis acid $(X)$ shows in the reaction:
It fumes in moist air:The intensity of fumes increases when a rod dipped in ${NH}_{4} OH$ is brought near it.An acidic solution of $(X)$ on addition of ${NH}_{4} Cl$ and ${NH}_{4} OH$ gives a precipitate which dissolves in $NaOH$ solution:An acidic solution of $(X)$ does not give precipitate with $H_{2} S$ . Identify $(X)$ and give chemical equations for reactions at steps $(i)$ to $(iii)$ .