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Engineering Exams RRB-JE Civil and Allied Engineering General Abilities 2019 28-Aug-2019 Paper-2 Shift-2 Easy +1 -0.33
______ and water in the air react together to form carbonic acid.
Correct Answer: C. Carbon dioxide
Explanation: Carbon dioxide Explanation: Carbon dioxide (CO2) in the atmosphere reacts with water (H2O) to produce carbonic acid (H2CO3). This chemical reaction occurs naturally when CO2 dissolves in rainwater or surface water, such as oceans. Because carbonic acid is a weak acid, it causes natural rainwater to be slightly acidic and contributes to the process of ocean acidification as atmospheric CO2 levels increase.
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