SSC CHSL 13 mar 2023 Shift 1 Paper

Section: General Awareness

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Question : 39 of 100

Marks: +1, -0

Which of the following statements is correct?

Living organisms can survive a wide range of pH change.
When pH of rain water is less than 8.2, it is called acid rain.
Our body works within the pH range of 7.0 to 7.8.
Tooth decay starts when the pH of the mouth is lower than 1.5.

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