Normal rainwater is slightly acidic because ____________ dissolves in water.A. sulphur dioxide gasB. nitrogen oxides gasC. carbon monoxide gasD. carbon dioxide gasE. limestone
Question
Normal rainwater is slightly acidic because ____________ dissolves in water.A. sulphur dioxide gasB. nitrogen oxides gasC. carbon monoxide gasD. carbon dioxide gasE. limestone
Solution
The correct answer is D. Carbon dioxide gas.
Here's the step by step explanation:
- When rainwater comes into contact with the atmosphere, it interacts with the gases present in the air.
- One of these gases is carbon dioxide (CO2).
- The rainwater and carbon dioxide react together to form a weak solution of carbonic acid (H2CO3).
- Carbonic acid is a weak acid, which gives the rainwater a slightly acidic pH.
- Therefore, normal rainwater is slightly acidic because carbon dioxide gas dissolves in water.
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