Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Sulphide ores are concentrated by the froth flotation method.
Reason (R):	Cresols stabilise the froth in the froth flotation method.

1.	Both (A) and (R) are true and (R) is the correct explanation of (A).
2.	Both (A) and (R) are true but (R) is not the correct explanation of (A).
3.	(A) is true but (R) is false.
4.	(A) is false but (R) is true.