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Question 07.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 ?(a) Lemon juice(b) Vinegar(c) Common salt(d) An antacid

Answer»

Question 07.

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 ?



(a) Lemon juice

(b) Vinegar

(c) Common salt

(d) An antacid





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