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Subjects
Science State Board
Class 6
Chemistry in Everyday life
Materials used in daily life and its manufacturing process
8.
Cement
Exercise condition:
4
m.
Choose the correct answer:
1
.
__________ is the chemical that provides hardness, colour, and strength to the cement.
Silica
Sulfur trioxide
Iron (III) oxide
2
.
When added in excess, __________ weakens the cement.
Both
Silica
Alumina
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