Which of the following statements is INCORRECT?

Question

Which of the following statements is INCORRECT? — Exam MCQ

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D. When pH of rain water is more than 5.6, it is called acid rain. — The incorrect statement is that when pH of rain water is more than 5.6, it is called acid rain. Acid rain occurs when the pH of rainwater is less than 5.6 because of the presence of sulfur dioxide and nitrogen oxides in the atmosphere. These gases react with water vapor to form sulfuric acid and nitric acid. If the pH is more than 5.6, the rain is called a normal rain.

rrbjepyq.in · Answer

A. Tooth decay starts when the pH of the mouth is lower than 5.5.

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B. When pH of rain water is less than 5.6, it is called acid rain.

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C. Living organisms can Survive only in a narrow range of pH change.

Which of the following statements is INCORRECT?

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