CIE iGCSE Co-Ordinated Science C6.2 Rate of reaction Exam Style Questions Paper 2
Question
The rate of a reaction that produces carbon dioxide gas is investigated.
Which piece of apparatus gives the least accurate measurement for the gas production?
(A) burette
(B) gas syringe
(C) measuring cylinder
(D) 3-decimal-place digital balance
▶️Answer/Explanation
Ans: C
Question
The apparatus used to determine the rate of a chemical reaction is shown.
For which reaction is the rate determined using this apparatus?
(A) CaCO$_{3}$ → CaO + CO$_{2}$
(B) 2C$_{2}$H$_{6}$ + 7O$_{2}$ → 4CO$_{2}$ + 6H$_{2}$O
(C) MgCO$_{3}$ + 2HCl → MgCl$_{2}$ + CO$_{2}$ + H$_{2}$O
(D) Cl$_{2}$ + 2NaBr → Br$_{2}$ + 2NaCl
▶️Answer/Explanation
Ans : C
Question
Which reaction that occurs in the Contact process requires the use of a vanadium(V) oxide catalyst?
(A) S + O$_{2}$ → SO$_{2}$
(B) 2SO$_{2}$ + O$_{2}$ → 2SO$_{2}$
(C) SO$_{2}$ + H$_{2}$SO$_{2}$ → H$_{2}$S$_{2}$O$_{7}$
(D) H$_{2}$S$_{2}$O$_{7}$ + H$_{2}$O → 2H$_{2}$SO$_{7}$
▶️Answer/Explanation
Ans : B
Question
When dilute hydrochloric acid reacts with calcium carbonate, carbon dioxide is produced.
Which pieces of apparatus are used to investigate the effect of temperature on the rate of this reaction?
(A) 1, 2 and 3 (B) 1 and 2 only (C) 1 and 3 only (D) 2 and 3 only
▶️Answer/Explanation
Ans: A