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Miscellaneous Tests

Test Observation Deduction

Heat compound A An odourless gas is evolved which turns bluecobalt(II) chloride paper pink.

Heat compound B A violet vapour is produced which condenses

to black crystals

Add HCl (aq) to a solution of C A pungent gas is evolved which turns

acidified potassium chromate green

Add HCl (aq) to a solution of D A vinegar smell. Gas turns moist blue litmus

red

Add sulfuric acid to a solution of E A white ppt is formed.

Add sulfuric acid to a solution of F Yellow solution turns orange

Add silver nitrate solution to a solution of Gfollowed by nitric acid. Test for the gas.

A white ppt turning yellowish-brown whichdissolves in nitric acid with gas giving white

ppt with limewater

Add silver nitrate solution to a solution of G

followed by nitric acid. Add dilute aqueous

ammonia

Cream ppt insoluble in dilute nitric acid and

fairly insoluble in dilute aqueous ammonia

Add lead(II) nitrate to a solution of H. Boil the

solution and cool it down.

Yellow ppt formed. Yellow ppt dissolves in

hot water. On cooling, golden crystals form

on cooling

Add iron(III) chloride solution to a solution of

J. Next, add in an organic solvent.

Brown solution formed. The organic layer

turns violet.Add sodium carbonate solution to a solution

of K.

A white ppt with no evolution of gas.

Add sodium hydroxide solution to a solution

of L. Warm.

A colourless solution is obtained. Gas evolved

turns moist red litmus blue.

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Add sodium carbonate solution to a solution

of M.

A green ppt with no evolution of gas.

Add KI solution to a solution of N. Brown solution is obtained. What is the nature of N?

Add potassium chromate(VI) solution to a

solution of P.

Orange solution turns green. What is the nature of P?

Add potassium manganate(VII) solution to a

solution of Q.

Purple solution is decolourised. What is the nature of Q?

Add potassium chromate(VI) solution to a

solution of R.

Yellow ppt is observed.

Apply flame test to a solid S. Brick red flame is observed.

Add iron(II) sulfate solution to a solution of T. Green solution turns yellow-brown What is the nature of T?

Add dilute HCl to U. A white ppt is observed.

To a liquid V, ignite a small amount of liquid

V in a crucible lid.

The liquid burns with a non-luminous flame.

To the same liquid V, add acidified potassium

chromate(VI) solution to V and warm. Test

the solution with a moist blue litmus paper.

The solution has a vinegar smell. Blue litmus

turns red.