Question

Q.7 answer it pls completely

Answer 1

CaCO3 is used CALCIUM CABONATE

CaO+H2O   ------>  Ca(OH)2

CCa(OH)2 + CO2 -----> CaCO3 + H2O

OR

When something sweet sticks to our teeth, it attracts the bacteria which tries to digest it secreting acid in this process. This causes it to damage the enamel. Toothpaste are alkaline in nature and neutralize this mouth acid.

MARK BRAINLIEST