Question

Assertion: `K_2Cr_2O_7` is used as primary standard in volumetric analysis.
Reason: It has a good solubilityin water.
A. If both (A) and (R) are correct and (R) is the correct explanation of (A).
B. If both (A) and (R) are correct, but (R) is not the correct explanation of (A).
C. If (A) is correct, but (R) is incorrect.
D. If (A) is incorrect but (R) is correct.

Answer 1

Correct Answer - c
Correct R: `K_@Cr_@O_7` is not much soluble in cold water, howerver, it is obtained in pure state and is not hygroscopic in nature.