Question

A colourless sample was tested with a strip of universal indicator .The colour of the sample changed to green. The sample should be *
Tap water
Distilled water
Sodium hydroxide
Lemon juice​

Answer 1

Answer:

Tap Water

Explanation:

The water quality regulations specify that the pH of tap water should be between 6.5 and 9.5. The pH of water should be neutral so that it can turns the universal indicator into green since it belongs to the neutral region of pH in the pH scale universal indicator solution.

Normal distilled water has a pH of less than 7.0 and acidic because it dissolves carbon dioxide from the air. Won't change to universal indicator in green. Since less than pH 7.0.

P.S TRY CHECKING THE 'pH SCALE' FOR MORE