IGCSE O Level Chemistry Practice Test 145

Exothermic Reactions Quiz Questions and Answers PDF - 145

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Exothermic Reactions Questions and Answers PDF Download: Quiz 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

C) NaOH

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

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