REACTIONS 1. concentrated sulphuric acid + solid potassium chloride 2. concentrated sulphuric acid + solid potassium bromide 3. concentrated sulphuric acid + solid potassium iodide solid potassium chloride make a note of any changes Acidimetr y 1 1 1 presenc e of hydroge n halide gas Yes Yes Yes detectio presenc e of n of hydroge sulfur n sulfide dioxide gas gas Absent No Absent Yes Present Yes

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