When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is

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Question:When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is

1.sulphur dioxide

2.ammonia

3.carbon monoxide

4.carbon dioxide

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  1. When potassium ferrocyanide crystals are heated with concentrated sulphuric acid, the gas evolved is
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