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Question

Rising levels of atmospheric carbon dioxide will cause which of the following changes in oceanic chemistry?

A
Increased precipitation of calcium carbonate
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B
Increased salinity
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C
Decreased pH
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D
Decreased salinity
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Solution

The correct option is C Decreased pH
Rising level of CO2 causes increase in the acidity of ocean water thereby decreasing the pH. In water CO2 reacts with H2O molecule to form H2CO3 i.e; carbonic acid, which then breaks down to H+ and HCO3.

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