Subsection 6.2. Rate of reaction for Chemistry, O Level - revisedeck

6.2. Rate of reaction

A subsection of Chemistry, 5070, through 6. Chemical reactions

Listing 10 of 90 questions

In two separate experiments, a substance is decomposed and the gas evolved is collected. The graph shows the total volume of gas collected against time for each experiment. time volume of gas collected experiment 2 experiment 1 Which graph shows how the speed of reaction varies with time in each experiment?

5070_s05_qp_1

MCQ

2005

Paper 1, Variant 0

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How does a catalyst increase the speed of a reaction?

5070_s12_qp_11

MCQ

2012

Paper 1, Variant 1

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Hydrogen reacts with iodine to form hydrogen iodide. This is a slow reaction. H2+ I22HI1 mole of hydrogen gas and 1 mole of iodine vapour were mixed and allowed to react. After t seconds, 0.6 moles of hydrogen remained. What is the number of moles of iodine remaining after t seconds?

5070_s15_qp_12

MCQ

2015

Paper 1, Variant 2

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At the start of a reaction, a 1.00 dm3 solution contains 0.300 mol of ethanol. After 100 seconds the concentration of the ethanol has decreased to 0.296 mol / dm3. What is the rate of reaction over the first 100 seconds?

5070_s17_qp_11

MCQ

2017

Paper 1, Variant 1

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The diagram shows the energy profile for a reaction. products reactants energy progress of reaction P Q R Which statement about this reaction is correct?

5070_s19_qp_11

MCQ

2019

Paper 1, Variant 1

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Which changes will speed up a chemical reaction?

5070_s21_qp_11

MCQ

2021

Paper 1, Variant 1

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Aqueous sodium thiosulfate reacts with hydrochloric acid. The rate of the reaction increases if the concentration of both reactants is increased. Nitrogen gas reacts with hydrogen gas. The rate of the reaction increases if the pressure in the reaction vessel is increased. Which row correctly explains why the given change increases the rate of the reaction?

5070_s21_qp_12

MCQ

2021

Paper 1, Variant 2

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Which row correctly describes changes in the particles when a substance freezes?

5070_s22_qp_11

MCQ

2022

Paper 1, Variant 1

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Catalysts change the rate of chemical reactions. Which statements correctly describe the effect of adding a catalyst to a reaction?

5070_s23_qp_11

MCQ

2023

Paper 1, Variant 1

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A 2 g sample of calcium carbonate reacts with dilute hydrochloric acid as shown...

5070_s24_qp_11

MCQ

2024

Paper 1, Variant 1

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Questions Discovered

90