SULPHURIC ACID

A) Answer the following:

1) How would you distinguish sulphur dioxide gas and HCL gas using blue Litmus strip ?

2) What is observed when hydrogen sulphide gas is passed  through lead acetate solution ?

3) Give two uses of hydrogen sulphide.

4) Sulphur dioxide and chlorine are both used as bleaching agents.

a) what is similar in the use of chlorine and sulphur dioxide as bleaching agents?

b) How does the bleaching action of these two gases differ ?

5) When hydrogen sulphide reacts with oxidizing agents, Whats substance is always a product of the reaction ?

6) what is the colour of the precipitate formed when hydrogen sulphide is bubbled through copper sulphate solution ?

7) Gas A is a reducing agent which contains oxygen

a) What is the name of the gas A?

b) What would you observe if  gas A is bubbled through acidified potassium dichromate solution ?

B) Write a balanced equation:

of the reaction in the preparation of the following:

a) Sulphur Dioxide by the action hot concentrated sulphuric acid on sulphur.

b) dilute hydrochloric acid and sodium sulphite.

c) Chlorine is passed into an aqueous solution of Sulphur dioxide.

C) State what is observed when Sulphur dioxide is passed through a jar containing bromine water.

D) Identify the anion present in the salt B on the basis of the following reaction:

Addiction of dilute hydrochloric acid to B produces a gas which turns lead acetate paper black.

E) Give reason behind:

a) When lead dioxide is heated in sulphur dioxide, a white powder is obtained.

b) When an aqueous solution of Sulphur dioxide is exposed to air,  it gets converted to sulphuric acid.

c) carbon dioxide Sulphur dioxide cannot be distinguished by using lime water.

d) Sulphur dioxide is used as an antichlor.

e) Why is the sulphur dioxide, obtained on a large scale, stored  in the liquefied form?

f) Why the lime water turns milky when Sulphur dioxide is passed through it.

g) When Sulphur dioxide is passed through hot concentric nitric acid, the reddish Brown fumes are seen seen.

h) Newsprint turns brownish on exposure to air.

F) Fill in the blanks:

a) Sulphur Dioxide gas acts as a strong_agent(reducing/oxidizing)

b) An aqueous solution of sulphur dioxide is___is nature. The presence of hydrogen ion impart this property to an  aqueous solution of Sulphur dioxide.( basic/acidic)

c) Sulphur dioxide solidifies at___ and liquifies at___( 57.46°C, -20°C / -75.46°C, - 19°C)

d) Sulphur dioxide reacts with water to produce____acid. (sulphurous/Sulphuric)

e) _____ gives the smell of rotten give the smell of rotten eggs. (Sulphur dioxide/hydrogen sulfide.

f) Bleaching action of Sulphur dioxide is___.( permanent/ temporary)

G) Name the following:

a) the gas obtained by burning metallic sulphides in oxygen.

b) The gas obtained by treating copper with hot concentric sulphuric acid.

c) Product obtained by the reaction of Sulphur dioxide with dry chlorine in the presence of Sunlight.

d) Acid obtained by dissolving Sulphur dioxide in water.

e) Products obtained when chlorine water reacts with sulphur dioxide.

f) Products obtained by passing Sulphur dioxide gas through potassium permanganate solution.

g) Products obtained by passing sulphur Dioxide gas through acidified potassium dichromate.

h) Bleaching agent used to bleach delicate articles.

i) A gas which turns moist blue Litmus red and finally bleach it.

j) The black precipitate obtained when hydrogen sulphide gas is bubbled through silver nitrate solution.

k) Gas with yields a black residue, when passed through copper sulphate solution.

l)  A gas which is given off from decaying cabbage.

m) A gas that burns in air with a pink blue flame forming sulphur.

n) The oxidised product obtained when burning magnesium burns in a jar of sulphur dioxide.

o) The gas produced by burning of sulphur in the air.

p) A gas which smell of rotten eggs.        OR

This compound smell of rotten eggs.