SCIENCE
ENVIRONMENTAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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pH 6.0
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pH 4.1
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pH 7.3
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pH 9.6
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Detailed explanation-1: -The pH of acid-impacted rain is generally below 4.5 on the pH scale. Acid rain can be formed by natural causes, such as volcanic eruptions. More commonly, however, acid rain is due to human activities.
Detailed explanation-2: -Consequently, a substance with a pH value of less than 7 is acidic, while one of a value greater than 7 is basic. Generally, the pH of 5.6 has been used as the baseline in identifying acid rain, with precipitation of pH less than 5.6 is considered to be acid precipitation.
Detailed explanation-3: -The lowest value recorded was pH 2.85, and the highest was 5.95 pH. Between 1969 and 1974, no pH reading exceeded 5.0. “Clean” rain should have a pH value somewhere between 5.3 and 5.6 pH. The difference between 5.6 pH and 7.0 pH is due to the presence of CO2, which dissolves to form carbonic acid.
Detailed explanation-4: -Answer: PH of rainwater is neutral in nature but when the rain comes rainwater combine with Carbon dioxide in the atmosphere to form carbonic acid which reduces the PH of rainwater from 3.5 – 5.6 which sometime may reach as low as 2.