IGCSE O Level Chemistry MCQs – Mock Test 145

Exothermic Reactions Quiz with Answers PDF Download – Test 145

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Exothermic Reactions Quiz – Mock Test 145 PDF Download

MCQ 721: Burning of methane (CH₄) gives off heat and:

carbon dioxide (gas) only
water (gas) only
hydrogen gas
carbon dioxide (gas) and water (gas)

MCQ 722: Uses of enzymes do not include:

production of insulin
production of cancer drugs
drug to combat plague
drug to fight dwarfism

MCQ 723: After the electrolysis of brine, the resulting solution largely contains:

Cl₂ gas
NaCl
NaOH
H₂ gas

MCQ 724: Formula of Calcium Nitride (Ca₃N₂) is:

Ca₃N₅
Ca₃NO₂
Ca₃N₂
Ca₂N₅

MCQ 725: Which statement is correct about the conductor?

it changes while conducting electricity
it does not change while conducting electricity
it does not allow flow of electricity
it cannot operate at high pressures

IGCSE O Level Chemistry Quiz App & eBook – Exothermic Reactions Admission Tests

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