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Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
- IIT JAM
- Geology (GG)
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they begin to dissolve as ocean waters become undersaturated with respect to calcium carbonate because of increasing pressure, decreasing temperature and increasing amounts of dissolved CO2. option b will be answer and d also can be possible Deep water collects CO2 because it's made by deep-sea creatures, from bacteria to fish, as they eat the falling bodies of plankton and use them for food. High CO2 levels make the water more acidic.
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Rahul kumar Best Answer
Ans (B) Increased soluble CO2 increases acidity With depth the concentration of CO2 increases in seawater (shown in attached figure). CO2 combines with water (H2O) to form carbonic acid (H2CO3) responsible for the dissolution of calcite.
can option d be the answer because with depth increasing hydrostatic pressure increases?which makes CaCO3 unstable
No, actually CCD is defined according to the concentration of CO2 in water. The depth of CCD changes from place to place because concentration of CO2 changes accordingly; however hydrostatic pressure remains same.