Study of Compounds D. Sulphuric Acid Assertion Reason Questions for ICSE Chemistry Class 10. This Assertion (A) Reason (R) type Questions is very helpful for this year students.
Question No. 1 and 20 consist of two statements – Assertion (A) and Reason (R). Answer these questions selecting the appropriate option given below:
a) Both A and R are true, and R is the correct explanation of A.
b) Both A and R are true, and R is not the correct explanation of A.
c) A is true but R is false.
d) A is false but R is true
Que 1) Assertion: Sulphuric acid was also known as vitriol.
Reason: It was obtained by heating crystals of green vitriol.
Que 2) Assertion: Relative molecular mass of sulphuric acid is 98.
Reason: Molecular formula of sulphuric acid is H2SO4.
Que 3) Assertion: Sulphuric acid is produced by reduction of an aqueous solution of sulphur dioxide with oxygen, chlorine, bromine.
Reason: Water is produced as bioproduct in the reaction of sulphur and conc. nitric acid.
Que 4) Assertion: Sulphuric acid can be manufacture by using contact process.
Reason: Incontact process the production of sulphur dioxide involves calcination process.
Que 5) Assertion: In contact process purification of gases is needed.
Reason: The mixture of sulphur dioxide and air contains various impurities which causes decrease the efficiency of the catalyst.
Que 6) Assertion: Sulphuric acid is found in combined state as, barytes, gypsum, kieserite etc.
Reason: Sulphuric acid never found in free state.
Que 7) Assertion: Scrubbing tower is used in contact process for the manufacturing of sulphuric acid.
Reason: Scrubbing tower is used for removal of impurities and dust particles by spay of water.
Que 8) Assertion: Testing box is used to test the arsenic oxide by passage of ferric hydroxide.
Reason: Absorption tower is used in contact process for absorption of sulphur trioxide vapours.
Que 9) Assertion: Vanadium pentoxide or platinum is used in catalytic oxidation of sulphur dioxide.
Reason: catalytic oxidation of sulphur dioxide is exothermic reaction so it requires heat about 4500C only in the beginning.
Que 10) Assertion: Dilution of oleum is takes place in the dilution tank to obtain sulphuric acid.
Reason: In this process water is removed from the dilution tank to obtain sulphuric acid.
Que 11) Assertion: The conservation of SO2 to SO3 is favoured at low temperature.
Reason: The conservation of SO2 to SO3reaction is exothermic.
Que 12) Assertion: In contact process pressure should be in the range of 1 to 2 atm.
Reason: The increase of supply of oxygen decreases the production of sulphur trioxide.
Que 13) Assertion: Sulphuric acid is colourless and odourless.
Reason: Sulphuric acid is dense, oily, hygroscopic liquid.
Que 14) Assertion: Sulphuric acid when dissolved in water it forms basic salt.
Reason: Sulphuric acid ionises in two stages and thus it is a dibasic acid.
Que 15) Assertion: Sulphur dioxide is poisonous and responsible for polluting environment.
Reason: Sulphur dioxide gas is evolved from sulphides and hydrogen sulphites.
Que 16) Assertion: Pure sulphuric acid is almost non-conductor if electricity.
Reason: Dilute sulphuric acid is good conductor of electricity.
Que 17) Assertion: Concentrated sulphuric acid is volatile in nature so it always kept in closed bottle.
Reason: Sulphuric acid is used to bleach only delicate materials such as coloured cloths, fresh green grass etc.
Que 18) Assertion: Vanadium peroxide is mostly use as a catalyst in contact process.
Reason: Platinum is more efficient as a catalyst than vanadium peroxide but it gets easily poisoned by impurities like arsenic oxide.
Que 19) Assertion: Dilute H2SO4is acts as strong electrolyte and it cannotact as an oxidizer.
Reason: Conc. H2SO4is acts as weak electrolyte and it can act as an oxidizer.
Que 20) Assertion: Sulphuric acid used to remove harmful impurities in purification of oil products, for e.g., petrol, kerosene.
Reason: Sulphuric acid is not used to produced compounds like Sodium sulphate.
ANSWERS
1) A 6) C 11) A 16) B
2) B 7) A 12) C 17) D
3) D 8) D 13) B 18) A
4) C 9) B 14) D 19) B
5) B 10) C 15) C 20) C