1.

Assertion: Sulphideoresareconcentrated byFrothFloatationmethod. Reason: Cresolsstabilisethefroth inFroth Floatationmethod.

Answer»

Bothassertionandreason aretrueandreason is thecorrectexplanationofassertion.
Both assertionandreasonaretruebutreasonis not thecorrectexplanationofassertion.
Assertionistrue butreasonisfalse.
Assertionis falsebutreasonistrue.

SOLUTION :Correctexplanation. Sulphideore PARTICLESARE PREFERENTIALLY wettedbyoil,becomelighterandthusrisetothesurfacealongwiththe frothwhilegangueparticlesarepreferentiallywtted BYWATER, becomeheavier andthussettle down atthebottomof THETANK.


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