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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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