O Level Biology Entrance Tests: Certification Test 1311

Pollution: Sewage as Cause MCQ App Download & PDF e-Book - 1311

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MCQ: 1311

Hydrogen sulfide (H₂S) and ammonia (NH₃) are produced from

the chimneys of factories
use of chlorofluorocarbon in foam packaging
decomposition of organic compounds by anaerobic bacteria
treatment of acidic wastes with alkalis

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Pollution: Sewage as Cause MCQ App Download & PDF e-Book - 1311

Pollution: Sewage as Cause Textbook Tests: O Level Biology App & eBook MCQ

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Download Pollution: Sewage As Cause eBook

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