Question

A student was given an unknown solution in a test-tube. When he added universal indicator to the test-tube, the solution turned violet. The unknown solution is most likely to be (1) baking soda solution
(2) washing soda solution
(3) caustic soda solution (4) household ammonia solution

Answer 1

Answer:

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Answer 2

A student was given an unknown solution in a test-tube. When he added universal indicator to the test-tube, the solution turned violet. The unknown solution is most likely to be caustic soda solution .

Explanation:

• As we know, a universal indicator is used to test the pH of the given sample i.e., to test the acidity and alkalinity nature of the sample.
• Red indicates the acidic nature and for blue-violet/purple indicates the basic or alkaline nature of the compound.
• In this case, the solution turned to violet indicating that the solution is alkaline in nature. Out of the four options given, caustic soda solution is known as to be the strongest alkaline solution.