What is the standard test of carbon dioxide? [2 MARKS]

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Solution

Explanation: 1 Mark
Chemical Equation: 1 Mark

The standard test of carbon dioxide is by passing it through lime water.
When carbon dioxide is passed through lime water, calcium carbonate is formed, which turns lime water milky.
Carbon dioxide ( $C O_{2}$ ) + Lime water [ $C a (O H)_{2}$ ] → Calcium Carbonate( $C a C O_{3}$ ) + Water ( $H_{2} O$ )

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