The slurry, in its movement down the kiln, encounters a progressively higher temperature. At first, the water is driven off and __________ is liberated.

The slurry, in its movement down the kiln, encounters a progressively

1.	The slurry, in its movement down the kiln, encounters a progressively higher temperature. At first, the water is driven off and __________ is liberated.
A.	SiO<sub>2</sub>
B.	CO<sub>2</sub>
C.	Gypsum
D.	CaO
Answer» C. Gypsum