What happens when the following are heated ?
` CaCO_3` and `SiO_2`

Explanation

Caco, up on heating gives Quick lime.
a) `CaCO_(3)overset(Delta)tounderset("Quick lime")(CaO+CO_(2))`
b) `CaCO_(3)overset(Delta)toCaO+CO_(2)`
Quick lime (CO) with silica gives Calcium silicate
`CaO+SiO_(2)tounderset("Ca. Silicate")`
c) `CaCO_(3)overset(Delta)toCaO+CO_(2)`
Coke reacts with Quick lime and form Carbides
`CaO+3CtoCaC_(3)+CO`
Ca. Carbide