A sample of soil is mixed with water and allowed to settle The clear supernatant solution turns the ...........

Chemistry Chapter - 2

A sample of soil is mixed with water and allowed to settle. The clear supernatant solution turns the pH paper yellowish-orange. Which of the following would change the colour of this pH paper to greenish-blue?

Lemon juice

Vinegar

Common salt

An antacid

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Explanation:

Sample solution turn pH paper yellowish-orange which confirms the acidic nature of the sample. In order to make the color to greenish-blue we have to add an antacid.