Energy from Chemicals MCQ App Download - IGCSE O Level Chemistry PDF e-Book
IGCSE O Level Chemistry MCQs - Chapter 7
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On burning, hydrogen is changed into
An efficient source of electricity production is to
Which one of these is an incorrect statement about an exothermic reaction?
Exothermic reactions take place when energy given out in making bonds is
Methane (CH4) is better fuel than Coal gas because
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