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IGCSE O Level Chemistry Practice Test 145

Exothermic Reactions Quiz Questions and Answers PDF - 145

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Exothermic Reactions Quiz Answers PDF Download: Test 145

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

A) carbon dioxide (gas) only
B) water (gas) only
C) hydrogen gas
D) carbon dioxide (gas) and water (gas)

MCQ 722: Uses of enzymes do not include

A) production of insulin
B) production of cancer drugs
C) drug to combat plague
D) drug to fight dwarfism

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

A) Cl2 gas
B) NaCl
D) H2 gas

MCQ 724: Formula of Calcium Nitride (Ca3N2) is

A) Ca3N5
B) Ca3NO2
C) Ca3N2
D) Ca2N5

MCQ 725: Which statement is correct about the conductor?

A) it changes while conducting electricity
B) it does not change while conducting electricity
C) it does not allow flow of electricity
D) it cannot operate at high pressures

IGCSE O Level Chemistry Exam Prep Tests

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9th Grade Chemistry App (Android & iOS)