<div class="main-heading">📌 Topic 10: Chemistry of the Environment</div>

<div class="sub-heading">10.1 Water</div>
<div class="point-item"><div class="point-question"><span><span class="point-number">1</span> Describe chemical tests for water using anhydrous cobalt(II) chloride and anhydrous copper(II) sulfate</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">2</span> Describe how to test purity of water using melting point and boiling point</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">3</span> State substances found in natural water sources</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">4</span> Describe treatment of domestic water supply</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>

<div class="sub-heading">10.2 Fertilisers</div>
<div class="point-item"><div class="point-question"><span><span class="point-number">1</span> State that ammonium salts and nitrates are used as fertilisers</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>

<div class="sub-heading">10.3 Air quality and climate</div>
<div class="point-item"><div class="point-question"><span><span class="point-number">1</span> State composition of clean, dry air</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">2</span> State sources of air pollutants</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">3</span> State adverse effects of air pollutants</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">4</span> Describe strategies to reduce environmental issues</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>
<div class="point-item"><div class="point-question"><span><span class="point-number">5</span> Describe photosynthesis: CO₂ + H₂O → glucose + oxygen</span><span class="icon">▼</span></div><div class="point-answer"><div class="answer-content"><p><em>Answer coming soon...</em></p></div></div></div>