The pH of fresh ground water slightly decreases upon exposure to air because _______.

carbon dioxide from air is dissolved in the water

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oxygen from air is dissolved in the water

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the dissolved carbon dioxide of the ground water escapes into air

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the dissolved oxygen of the ground water escapes into air

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Solution

The correct option is A carbon dioxide from air is dissolved in the water
The pH of fresh ground water decreases upon exposure to air because water reacts with carbon dioxide which becomes $H_{2} C O_{3}$ and becomes acidic.

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Similar questions

Which of the following involves the process of diffusion in?
A. The movement of minerals from the soil into root hair cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.

Q. Which of the following always involves the process of diffusion?
A. The gaseous exchange between the closely placed cells.
B. The movement of water into the cells of living things.
C. The movement of dissolved oxygen from the surrounding water into an amoeba.
D. The movement of carbon dioxide from the air into leaf cells.

Q. Air dissolved in water contains a higher percentage of oxygen

Q. Assertion :Air dissolved in water contains a lower percentage of oxygen than contained in air Reason: The solubility of oxygen in water is

33

Q. As oxygen is ______ soluble in water, air dissolved in water contains a higher percentage of oxygen (

30 - 35

%) than ordinary air (

21

%).

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The pH of fresh ground water slightly decreases upon exposure to air because _______.

The correct option is A carbon dioxide from air is dissolved in the waterThe pH of fresh ground water decreases upon exposure to air because water reacts with carbon dioxide which becomes H2CO3 and becomes acidic.

The correct option is A carbon dioxide from air is dissolved in the water
The pH of fresh ground water decreases upon exposure to air because water reacts with carbon dioxide which becomes $H_{2} C O_{3}$ and becomes acidic.