Same chapter3 marksDifficulty: Medium
What is the greenhouse effect? Name two greenhouse gases and state one consequence of an enhanced effect.
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3 marksDifficulty: Medium
What is acid rain, how is it caused and state two of its effects.
Original Khojo Papers practice question — not from a past board paper.
Answer
Acid rain is rain with a pH below about 5.6, caused when oxides of sulphur and nitrogen from burning fossil fuels dissolve in atmospheric moisture to form sulphuric and nitric acids. It acidifies lakes and rivers and kills aquatic life, and it corrodes buildings and statues of marble and limestone.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
It also leaches nutrients from soil and damages the leaves of plants.
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