Question

A teacher gave two test tubes – one containing water and the other containing sodium hydroxide solution to two students. Then he asked them to identify the test tube containing sodium hydroxide solution. Which one of the following can be used for correctly identifying the test tube containing the solution of sodium hydroxide?
(a) Blue litmus (b) Red litmus (c) Sodium carbonate solution (d) Dilute HCl

Answer 1

Answer:

( b ) Red litmus

Explanation:

red litmus can be used because a base converts the red litmus to blue . Test red litmus paper turns blue in sodium hydroxide solution as it is base . while no charge is observed in case of water as it is neutral

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Answer 2

Answer:

b) Red Litmus

Explanation:

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