Question

7. 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 1

Answer:

d) an antacid

Explanation:

because antacid are generally made up of base to neutralize the reaction between acid and base and base changes the colour to greenish- blue ex of antacid is baking soda/ sodium bicarbonate

Answer 2

Answer:

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