Practical Work Chemistry - Practical Work

The salt which in solution gives a pale precipitate with sodium hydroxide solution and a white precipitate with barium chloride solution is : ________ .

State your observation of the following case :
When calcium hydroxide is heated with ammonium chloride crystals.

State your observation of the following case :
When excess sodium hydroxide is added to calcium nitrate solution.

State your observation of the following case :
When dilute hydrochloric acid is added to sodium carbonate crystals.

Distinguish between the following pairs of compounds using the test given with brackets :
Dilute sulphuric acid and dilute hydrochloric acid (using barium chloride solution)

State your observation of the following case :
At the cathode when acidified aqueous copper sulphate solution is electrolyzed with copper electrodes

Salts A, B, C, D and E undergo reactions (i) to (v) respectively. Identify the anion present in these salts on the basis of these reactions. Tabulate your answers in the format given below:
(i) When silver nitrate solution is added to asolution of A, a white precipitate, insoluble in dilute nitric acid, is formed.
(ii) Addition of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black.
(iii) When a freshly prepared solution of ferrous sulphate is added to a solution of C and concentrated sulphuric acid is gently poured from the side of the test, a brown ring is formed.
(iv) When dilute sulphuric acid is added to D, a gas is produced which turns acidified potassium dichromate solution from orange to green.
(v) Addition of dilute hydrochloric acid to E produces an effervescence. The gas produced turns limewater milky but does not affect acidified potassium dichromate solution.

Salt	Anion
A
B
C
D
E

A solution of hydrogen chloride in water is prepared. The following substances are added to separate portions of the solution :

S.NO.	Substance added	Gas evolved	Odour
1	Calcium carbonate	_________	_________
2	Magnesium ribbon	_________	_________
3	Manganese (IV) oxide with heating	_________	_________
4	Sodium sulphide	_________	_________

Identify the salts P and Q from the observation given below:
On performing the flame test salt P produces a lilac coloured flame and its solution gives a white precipitate with silver nitrate solution. Which is soluble in ammonium hydroxide solution.

Identify the gas evolved and give the chemical test of the following case :
Dilute hydrochloric acid reacts with iron (II) sulphide

Identify the gas evolved and give the chemical test of the following case :
Dilute hydrochloric acid reacts with sodium sulphite.

Identify the cation of the following case:
NaOH solution when added to solution (C) gives white ppt. which insoluble in excess.