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1. Write the balanced chemical equations for the following reactions.
Copper sulphate on treatment with potassium iodide precipitates cuprous iodide (\(CuI\)), liberates iodine gas and also forms potassium sulphate.
The balanced chemical equation of the above statement is
+ \(4KI\) → \(2CuI\) + \(I_2\) +
2. Why do fire flies glow at night?
At night, fireflies glow due to a chemical process that includes the . Fireflies contain a protein (luciferin) that combines with oxygen (air) to produce a new substance (oxyluciferin), resulting in the in the form of light.
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