MyQuestionIcon

2

You visited us 2 times! Enjoying our articles? Unlock Full Access!

Polar Molecules

Sodium sulpha...

Question

Sodium sulphate filtrate formed from first step of oxidation test of sulphur is acidified with dilute hydrochloric acid and a solution of barium chloride to form ________ colour precipitate:

A

blue

No worries! We‘ve got your back. Try BYJU‘S free classes today!

B

red

No worries! We‘ve got your back. Try BYJU‘S free classes today!

C

white

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

D

brown

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is C white
Oxidation Test:
The organic compound is fused with a mixture of potassium nitrate and sodium carbonate. Sulphur, if present, gets oxidised to sodium sulphate.
$3 K N O_{3} ⟶ 3 K N O_{2} + 3 [O] {N a}_{2} C O_{3} + S + 3 [O] ⟶ {N a}_{2} S O_{4} + C O_{2}$
The fused mass is extracted with water, the contents are boiled and filtered. The filtrate contains sodium sulphate. The filtrate is acidified with dilute hydrochloric acid and a solution of barium chloride is added. Formation of a white precipitate indicates the presence of sulphur.
$B a {C l}_{2} + {N a}_{2} S O_{4} ⟶ B a S O_{4} ↓ + 2 N a C l$

Suggest Corrections

thumbs-up

0

Similar questions

Q. Sodium sulphate filtrate formed from the first step of oxidation test of sulphur is acidified with dilute hydrochloric acid and a solution of barium chloride to form a precipitate. The precipitate is :

Q. Write balanced chemical equations for each of the following reactions
1. Carbon dioxide Marble dissolves in hydrochloric acid to give calcium chloride water and carbon dioxide
2. Silver nitrate reacts with copper to produce copper nitrate and silver metal
3. Carbon dioxide gas is passed over lime water to form a precipitate of calcium carbonate
4. Aluminium Sulphate acts with Sodium Hydroxide to form precipitate of aluminium hydroxide and the solution of sodium sulphate
5. Barium Chloride solution reacts with sulphuric acid to form precipitate of Barium sulphate and solution of hydrochloric acid.

Q. (a) Sodium hydroxide solution can be used to distinguish between (i) Iron (II) sulphate solution and (ii) iron (III) sulphate solution; because these solutions give different coloured precipitates with sodium hydroxide solution. Give the colour of the precipitate formed with each of the solution.
(b) What will you observe when barium chloride solution is added to iron (II) sulphate solution?
(c) How will the action of dilute hydrochloric acid on sodium carbonate and sodium sulphite enables you to distinguish between these two compounds?

Q. The questions (i) to (v) refer to the following salt solutions listed (a) to (f):
(a) Copper nitrate
(b) Iron (II) sulphate
(c) Iron (III) chloride
(d) Lead nitrate
(e) Magnesium sulphate
(f) Zinc chloride

(i) Which two solutions will give a white precipitate when treated with dilute hydrochloric acid followed by barium chloride solution?
(ii) Which two solution will give a white precipitate when treated with dilute nitric acid followed by silver nitrate solution?
(iii) Which solution will give a white precipitate when either dilute hydrochloric acid or dilute sulphuric acid is added to it?
(iv) Which solution becomes a deep/inky blue colour when excess of ammonium hydroxide is added to it?
(v) Which solution gives a white precipitate with excess ammonium hydroxide solution?

Q. Balance the chemical equation by including the physical states of the substances for the following reactions.

a) Barium chloride and sodium sulphate aqueous solutions react to give insoluble Barium sulphate and an aqueous solution of sodium chloride.

b) Sodium hydroxide reacts with hydrochloric acid to produce sodium chloride and water.

c) Zinc pieces react with dilute hydrochloric acid to liberate hydrogen gas and forms zinc chloride

View More

Join BYJU'S Learning Program

similar_icon

Related Videos

lock

Polar Molecules

CHEMISTRY

Watch in App

explore_more_icon

Explore more

Polar Molecules

Standard X Chemistry

Join BYJU'S Learning Program

CrossIcon