Kinetics quiz

1. Large chips of calcium carbonate reacts with an excess of hydrochloric acid in a flask. The volume of carbon dioxide given off is measured in a gas syringe. This is shown on the graph. How would the graph look different if the reaction was done with a powdered calcium carbonate?

Line rises less steeply. Levels out at lower level.

Line rises more steeply. Levels out at same level.

Line rises more steeply. Levels out at higher level.

Line rises at same rate, but levels out at a higher level.

Question 1 of 15

2. Give a simple reaction can be used to investigate the effect of changing concentration on the rate of reaction

Ethene of various concentrations reacted with water to make ethanol

Marble chips added to hydrochloric acid of various concentrations

Sodium hydroxide of various concentrations added to hydrochloride acid to produce sodium chloride

Iron ore of various concentrations reacted via the displacement method to produce iron

Question 2 of 15

3. What is a catalyst?

A substance that helps dissolve insoluble reagents to speed up the rate of reaction

A substance that speeds up a chemical reaction but is chemically unchanged at the end of the reaction

A substance that speeds up a chemical reaction but is used up as the reaction proceeds

A substance that slows down a chemical reaction but is chemically unchanged at the end of the reaction

Question 3 of 15

4. Give a simple reaction can be used to investigate the effect of changing surface area on the rate of reaction

Burning powdered magnesium or strips of magnesium in air

Large chips or powdered ion ore reacted to produce iron using the displacement method

Hydrochloric acid added to either marble chips or powdered calcium carbonate

Large chips or powdered sodium nitrate added to hydrochloric acid

Question 4 of 15

5. On a graph showing gas produced (vertical axis) over time (horizontal axis), how does the line tell us the rate of reaction?

The longer the line, the slower the rate of reaction

The steeper the line, the faster the rate of reaction

The steeper the line, the slower the rate of reaction

The longer the line, the faster the rate of reaction

Question 5 of 15

6. Write the word equation for the decompostion of hydrogen peroxide, H₂O₂

hydrogen peroxide → hydrogen + oxygen + carbon dioxide

hydrogen peroxide → water + hydrogen

hydrogen peroxide → water + oxygen + carbon dioxide

hydrogen peroxide → water + oxygen

Question 6 of 15

7. Explain the effects of increasing the temperature on the rate of a reaction in terms of particle collision theory

1) particles have more kinetic energy 2) more frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) increase rate of reaction

1) particles have more kinetic energy 2) more frequent collisions 3) and a higher proportion of the collisions which occur have greater or equal to the activation energy 4) increase rate of reaction

1) particles have less kinetic energy 2) less frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) decrease rate of reaction

1) particles have less kinetic energy 2) less frequent collisions 3) and a lower proportion of the collisions which occur have greater or equal to the activitation energy 4) increase rate of reaction

Question 7 of 15

8. State the catalyst used for making oxygen through the decomposition of hydrogen peroxide

Vanadium (V) oxide V₂O₅

Magnesium (II) oxide, MgO₂

Potassium permanganate (VII), KMnO₄

Manganese (IV) oxide, MnO₂

Question 8 of 15

9. Explain the effects of increasing the surface area of a solid on the rate of a reaction in terms of particle collision theory

1) more particles exposed 2) less frequent collisions 3) decrease rate of reaction

1) more particles exposed 2) more frequent collisions 3) decrease rate of reaction

1) more particles exposed 2) more frequent collisions 3) increase rate of reaction

1) more particles exposed 2) less frequent collisions 3) increase rate of reaction

Question 9 of 15

10. Calcium carbonate reacts with an excess of hydrochloric acid in a flask. The mass of flask and contents decreases over time as the carbon dioxide escapes. This is shown on the graph. How would the graph look different if the reaction was done with a lower concentration of hydrochloric acid?

Lines falls less steeply. Levels out at same level.

Lines falls more steeply. Levels out at lower level (but still above zero).

Lines falls more steeply. Levels out at same level.

Lines falls more steeply. Levels out at higher level.

Question 10 of 15

11. What happens to the rate of reaction if the temperature is INCREASED?

Reaction stops

Rate of reaction is unaffected

Rate of reaction decreases

Rate of reaction increases

Question 11 of 15

12. What is meant by the term activation energy?

The energy provided by the catalyst to allow a reaction to proceed

The energy released by the reaction

The minimum energy that the particles in collision must have if a reaction is going to occur

The maximum energy of the final product for it to be stable

Question 12 of 15

13. What happens if two particles collide with less than the activation energy

The reaction only goes partway

No reaction

The reaction still occurs but very slowly

The particles fuse together

Question 13 of 15

14. Explain how a catalyst works

A catalyst increases the concentration of the reagents by taking up water to increase the rate of reaction

A catalyst increases the surface area of the reagents to increase the rate of reaction

A catalyst reduces the activation energy of the reaction

A catalyst provides an alternative pathway with lower activation energy

Question 14 of 15

15. What type of substance speeds up a chemical reaction but is chemically unchanged at the end of the reaction?

Catalyst

Solute

Reagent

Ore

Question 15 of 15

Kinetics quiz

Related Posts:

Share This Story, Choose Your Platform!