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Question

Write balanced chemical equations involved in the following reactions:
(a) Fluorine gas reacts with water.
(b) Phosphine gas is absorbed in copper sulphate solution.

Solution
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(i) Fluorine gas reacts with water-
Fluorine reacts violently with water forming hydrogen fluoride and oxygen gas is evolved.So the balanced chemical equation will be:
2F2(g)+2H2O(l)4HF(aq.)+O2(g)
(ii) When phosphine gas is absorbed in copper sulphate solution, it gives black precipitate of cupric phosphide and sulphuric acid. So the balanced chemical equation will be.
2PH3+3CuSO4Cu3P2+3H2SO4

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