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Question : Which of the following statements is correct?

Option 1: Living organisms can survive a wide range of pH changes.

Option 2: When the pH of rainwater is less than 8.2, it is called acid rain.

Option 3: Our body works within the pH range of 7.0 to 7.8.

Option 4: Tooth decay starts when the pH of the mouth is lower than 1.5.


Team Careers360 22nd Jan, 2024
Answer (1)
Team Careers360 23rd Jan, 2024

Correct Answer: Our body works within the pH range of 7.0 to 7.8.


Solution : The correct option is Our body works within the pH range of 7.0 to 7.8 .

The human body operates best within a pH range of 7.0 to 7.8, which is crucial for enzyme activity, cellular function, blood stability, protein structure, and overall health. The body has buffer systems, and regulatory mechanisms to resist pH changes and maintain physiological balance. Living organisms can only survive within a pH range of 6 to 9. Acid rain occurs when the pH drops below 5.6, and tooth decay starts at a pH below 5.5, leading to enamel erosion.

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