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Oxides, peroxides, superoxides and hydroxides
JEE Main level
Single correct option
Difficulty 2 of 3
sb132
In metallurgy,
CaO
is added to remove silica from the ore as a slag. The slag is:
A
CaCO
X
3
B
Ca
(
OH
)
X
2
C
CaSiO
X
3
D
CaC
X
2
Answer: C
A basic oxide combines with an acidic oxide:
CaO
+
SiO
X
2
CaSiO
X
3
. Calcium silicate is the fusible slag that separates from the metal.
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