How can we test for carbon dioxide gas?
Carbon dioxide turns limewater milky due to the formation of calcium carbonate.
What is the role of indicators in identifying acids and bases?
Indicators change color in the presence of an acid or a base, helping to identify whether a solution is acidic or basic.
Why do acids react with metals to produce hydrogen gas?
Acids donate hydrogen ions (H⁺) in water. When they react with metals, the hydrogen ions are reduced to hydrogen gas.
What is a neutralization reaction?
A neutralization reaction is when an acid reacts with a base to form salt and water. Example: HCl + NaOH → NaCl + H₂O
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