Given below are two statements :-
Statement I :- In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II :- Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer from the options given below :-
Statement I :- In froth floatation method a rotating paddle agitates the mixture to drive air out of it.
Statement II :- Iron pyrites are generally avoided for extraction of iron due to environmental reasons.
In the light of the above statements, choose the correct answer from the options given below :-
- (A)Both Statement I and Statement II are true
- (B)Statement I is false but Statement II is true✓ Correct
- (C)Statement I is true but Statement II is false
- (D)Both Statement I and Statement II are false
Answer: (B)
Solution
In the froth floatation process the rotating paddle draws air into the suspension and churns it, so that bubbles carrying the sulphide ore rise to the top as froth; it does not drive air out, so the first statement is false. Iron pyrites is avoided as a source of iron because roasting it liberates large amounts of sulphur dioxide, an environmentally harmful gas, so the second statement is true. Hence the first statement is false while the second is true.
JEE Main · 2023 · 25 Jan 2023 · Shift 2 · Single correct option