IGCSE O Level Chemistry MCQs – Practice Test 2 (Chapter 7)

Energy from Chemicals MCQ with Answers PDF – Download Test 2

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Energy from Chemicals MCQ PDF Download – Practice Test 2

MCQ 6: On burning, hydrogen is changed into:

hydroxides
water vapors
dilute acids
hydrogen gas

MCQ 7: An efficient source of electricity production is to:

combine hydrogen and oxygen to form water
drive generators through steam
combine nitrogen with hydrogen
none of above

MCQ 8: Which one of these is an incorrect statement about an exothermic reaction?

it form a compound which gives out heat while being formed
it contains products that are very stable
it results in overall enthalpy change zero
it gives overall negative enthalpy

MCQ 9: Exothermic reactions take place when energy given out in making bonds is:

less than the energy taken in for breaking bonds
more than the energy taken in for breaking bonds
equal to the energy taken in for breaking bonds
none of above

MCQ 10: Methane (CH₄) is better fuel than Coal gas because:

it is endothermic
it is exothermic
it gives off more heat than coal gas
it requires very little oxygen to burn

IGCSE O Level Chemistry Notes App & e-Book – Energy from Chemicals Exam Prep

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