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 color of this pH paper to greenish-blue?

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

Lemon juice

Vinegar

Common salt

Antacid

answer is D.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

●        The pH paper turns yellow-orange, indicating that the mixture of soil and water is acidic in nature. A pH paper can be used to calculate this pH by comparing it to the supernatant's colour.
●        Citric acid, or vitamin C, which is found in abundance in lemon juice.
●        Acetic acid and water are combined to make vinegar. It is created by bacteria that function as an acid. It's a gentle acid.
●        Sodium chloride, or table salt, contains both sodium ions and chloride ions. As only base can cause this alteration, these three cannot make the pH paper turn greenish-blue.
●        Baking soda, sodium bicarbonate, and sodium hydrogen carbonate, which are bases, can turn pH paper from yellow-orange to green while being acidic in nature and are used as antacids.

Watch 3-min video & get full concept clarity