Ncert Exercises & Solutions

Given below are two statements:

Assertion (A):	Separation of Zr and Hf is difficult.
Reason (R):	Because Zr and Hf lie in the same group of the periodic table.

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 not true but (R) is true
4.	Both (A) and (R) are false.