What type of substance reacts with limestone open paren CaCO sub 3 close paren and produces carbon dioxide gas?
Answer
A
an acid
B
a neutral substance
C
both an acid and a base
D
a base
Explanation
Limestone is calcium carbonate (CaCO₃). Acids react with carbonates to produce carbon dioxide gas, along with a salt and water, so the correct choice is an acid.
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