Multiple Choice Question Answer XXXXVII — task. Science CBSE, Class 10.

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1. A test tube contains a colourless solution of potassium iodide. The presence of iodine can be tested by:

Passing chlorine gas through the solution
Passing carbon dioxide gas through the solution
Adding a few drops of blue litmus solution
Adding a few drops of copper sulphate solution

2. Aluminium oxide reacts with sulphuric acid to form:

Aluminium sulphate and water
Aluminium sulphate and sulphur dioxide
Aluminium sulphate and hydrogen
Aluminium sulphate and oxygen

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