Sulphur and its Compounds Questions and Answers
Questions
1.Sulphur is extracted from underground deposits by a process in which three concentric pipes
are sunk down to the deposits as shown below
1.a)Name the process represented above
b)What is passed down through pipe J?
c)Name the two allotropes of sulphur
d) Commercial sulphuric acid has a density of 1.8gcm3.
Calculate the molarity of this acid. Determine the volume of commercial acid in(a) above that can be
used to prepare 500cm3 of 0.2M H2SO4 solution
2. Oleum (H2S2O7) is an intermediate product in the industrial manufacture of sulphuric acid
a) How is oleum converted into sulphuric(IV)acid? b) Give one use of sulphuric acid
c) Differentiate between the bleaching action of chloride and sulphur (IV) oxide gas.
3 a. (i)Is concentrated sulphuric acid a weak acid or a strong acid?
(ii)Explain your answer in (i) above.
b)In the manufacture of sulphuric acid, sulphur (IV) oxide is oxidized to sulphur (VI) oxide.
C)Name the catalyst used
d). (i)Write the equation representing the conversionof sulphur (IV) oxide to sulphur(VI)oxide
(ii) Explain using equations how dilute sulphuric acid is finally obtained from sulphur (VI) oxide
4 a) When a mixture of concentrated sulphuric acid and copper turnings is strongly heated, a
colourless gas and solid mixture of white and black solids are formed. When this solid mixture is
, treated with distilled water, and filtered, a blue solution and black solid residue are collected. Explain
the observations on the solid mixture formed in the above experiment
4 a)The set-up below is used to prepare dry sulphur (IV) Oxide in the laboratory. Answer questions that
follow:
i) Identify the mistake in the set-up
ii)Write an equation for the reaction in the set-up
b(i)State how the polluting effects of the gas on the environment can be controlled
ii) State the observation made at the end of the experiment when a mixture of iron powder and
sulphur are heated in a test-tube
C)Write an equation for the reaction between the product in (a) above and dilute hydrochloric acid
5 a)When a mixture of iron powder and sulphur is heated it glows more brightly than that of iron
fillings and sulphur. Explain this observation
b)Name one reagent that can be reacted with dilute hydrochloric acid to produce Sulphur (IV) oxide
c)What would be observed if moist blue litmus paper is dropped into a gas jar of sulphur (IV) oxide?
Explain your answer with an equation
d)State two properties that vulcanized rubber posses as a result of vulcanization
6.a)During Frasch process molten sulphur flows out through the middle pipe but not through the outer
pipe. Give a reason.
b)Give two reasons why during the manufacture of sulphuric (VI) acid, sulphur (VI) Oxide, is dissolved
in concentrated Sulphuric (VI) acid instead of dissolving in water
C) State one use of sulphuric (VI) acid
7.The diagram below may be used to react hydrogen sulphide and sulphur (IV) oxide.
Study it and answer the questions that follow:-
Questions
1.Sulphur is extracted from underground deposits by a process in which three concentric pipes
are sunk down to the deposits as shown below
1.a)Name the process represented above
b)What is passed down through pipe J?
c)Name the two allotropes of sulphur
d) Commercial sulphuric acid has a density of 1.8gcm3.
Calculate the molarity of this acid. Determine the volume of commercial acid in(a) above that can be
used to prepare 500cm3 of 0.2M H2SO4 solution
2. Oleum (H2S2O7) is an intermediate product in the industrial manufacture of sulphuric acid
a) How is oleum converted into sulphuric(IV)acid? b) Give one use of sulphuric acid
c) Differentiate between the bleaching action of chloride and sulphur (IV) oxide gas.
3 a. (i)Is concentrated sulphuric acid a weak acid or a strong acid?
(ii)Explain your answer in (i) above.
b)In the manufacture of sulphuric acid, sulphur (IV) oxide is oxidized to sulphur (VI) oxide.
C)Name the catalyst used
d). (i)Write the equation representing the conversionof sulphur (IV) oxide to sulphur(VI)oxide
(ii) Explain using equations how dilute sulphuric acid is finally obtained from sulphur (VI) oxide
4 a) When a mixture of concentrated sulphuric acid and copper turnings is strongly heated, a
colourless gas and solid mixture of white and black solids are formed. When this solid mixture is
, treated with distilled water, and filtered, a blue solution and black solid residue are collected. Explain
the observations on the solid mixture formed in the above experiment
4 a)The set-up below is used to prepare dry sulphur (IV) Oxide in the laboratory. Answer questions that
follow:
i) Identify the mistake in the set-up
ii)Write an equation for the reaction in the set-up
b(i)State how the polluting effects of the gas on the environment can be controlled
ii) State the observation made at the end of the experiment when a mixture of iron powder and
sulphur are heated in a test-tube
C)Write an equation for the reaction between the product in (a) above and dilute hydrochloric acid
5 a)When a mixture of iron powder and sulphur is heated it glows more brightly than that of iron
fillings and sulphur. Explain this observation
b)Name one reagent that can be reacted with dilute hydrochloric acid to produce Sulphur (IV) oxide
c)What would be observed if moist blue litmus paper is dropped into a gas jar of sulphur (IV) oxide?
Explain your answer with an equation
d)State two properties that vulcanized rubber posses as a result of vulcanization
6.a)During Frasch process molten sulphur flows out through the middle pipe but not through the outer
pipe. Give a reason.
b)Give two reasons why during the manufacture of sulphuric (VI) acid, sulphur (VI) Oxide, is dissolved
in concentrated Sulphuric (VI) acid instead of dissolving in water
C) State one use of sulphuric (VI) acid
7.The diagram below may be used to react hydrogen sulphide and sulphur (IV) oxide.
Study it and answer the questions that follow:-
