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:

Statement I: In froth floatation method, a rotating paddle agitates the mixture to drive air out of it.

This is false. The rotating paddle agitates the mixture to draw air INTO it (not out of it), creating froth to which the mineral particles attach.

Statement II: Iron pyrites are generally avoided for extraction of iron due to environmental reasons.

This is true. Iron pyrites (FeS₂) produce SO₂ on roasting, which causes air pollution. Hence, oxide ores are preferred for iron extraction.

The correct answer is Option 2: Statement I is false but Statement II is true.