The photograph shows a limestone quarry - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Question 2
The photograph shows a limestone quarry.
Complete the sentence by putting a cross (X) in the box next to your answer.
Opening a limestone quarry causes environmenta... show full transcript
Worked Solution & Example Answer:The photograph shows a limestone quarry - Edexcel - GCSE Chemistry - Question 2 - 2013 - Paper 1
Step 1
Complete the sentence by putting a cross (X) in the box next to your answer.
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Answer
The correct answer is B: increases noise. Opening a limestone quarry can lead to increased noise levels due to machinery and blasting activities, which can disrupt local communities and wildlife.
Step 2
Explain what is meant by thermal decomposition.
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Answer
Thermal decomposition is a chemical reaction where a single compound breaks down into two or more simpler substances when heated. In this reaction, calcium carbonate (CaCO₃) undergoes thermal decomposition to produce calcium oxide (CaO) and carbon dioxide (CO₂). This process involves the breaking of chemical bonds due to the application of heat.
