The sand used for filtration should not lose weight more than ________ when placed in Hcl for 24 hours.

The sand used for filtration should not lose weight more than _______

1.	The sand used for filtration should not lose weight more than ________ when placed in Hcl for 24 hours.
A.	5 %
B.	10 %
C.	15 %
D.	20 %
Answer» B. 10 %