Measuring rate of reaction Competition

1.

Multiple Choice

30 sec

1 pt

What is the rate of reaction?

How fast a reaction is

How big a reaction is

How loud a reaction is

How much gas a reaction produces

2.

Multiple Choice

1 min

1 pt

What method can NOT be used to collect gas?

Using a gas syringe

Collecting it in a measuring cylinder under water

Measuring the change in mass

Seeing how quickly the solution goes cloudy

3.

Multiple Choice

3 mins

1 pt

The reaction between zinc and hydrochloric acid may be represented by the equation:

Zn(s) + 2HCl(aq) → ZnCl₂(aq) + H₂(g);

In an investigation of this reaction using excess Zn and 2 M HCl(aq) in an open flask, the graph shown was plotted from the data collected.

Which of the following would be a suitable quantity for the vertical axis of the graph?

mass of zinc per second

volume of hydrogen gas produced per second

Temperature.

mass loss per second

4.

Multiple Choice

2 mins

1 pt

The word for a substance created in a chemical reaction...

Reaction

Reactant

Product

Mass

5.

Multiple Choice

30 sec

1 pt

How is this equipment being used to measure the rate of reaction?

The gas syringe measures how much gas is produced in a certain time

The reaction mixture will increase in volume in a certain time

6.

Multiple Choice

2 mins

1 pt

If 5cm3 of gas is produced in 20 secs what is the average rate of reaction?

5cm3s-1

0.25cm3s-1

4cm3s-1

7.

Multiple Choice

2 mins

1 pt

why is the reaction fastest at the start ?

The reactants are in their greatest concentration

this statement is untrue the reaction is same rate through out whole reaction

8.

Multiple Choice

30 sec

1 pt

To measure the speed of a reaction you will use one of the following equipment.

Petri dish

Stop watch

stirring rod

Universal indicator

9.

Multiple Choice

1 min

1 pt

The graph shows how the total volume of a gas given off from a reaction changes with time. In which time interval is least gas given off?

A

B

C

D

10.

Multiple Choice

2 mins

1 pt

Which unit is correct for the rate of reaction?

g mol^-1

g min^-1

mol dm^-3

kJ mol^-1

11.

Multiple Choice

1 min

1 pt

What is the meaning of the rate of reaction?

Decrease in amount of product

Decrease in amount of product against time

Increase in amount of products against time

Increase in amount of reactants against time

12.

Multiple Choice

2 mins

1 pt

Which of the following has the lowest rate of reaction?

Combustion of ethanol

Fermentation of glucose

Oxidation of magnesium

Precipitation of silver chloride

13.

Multiple Choice

2 mins

1 pt

Which reactions has the highest rate of reaction?

Rusting of water pipe

Photosynthesis in green plant

Burning of a small piece of charcoal in the air

Formation of stalactites and stalagmites

14.

Multiple Choice

1 min

1 pt

Which process has the highest rate of reaction?

Rusting

Respiration

Combustion

Photosynthesis

15.

Multiple Choice

2 mins

1 pt

The following equation represents a chemical equation.

CaCO₃ + 2HCl --> CaCl₂ + CO₂ + H₂O

Which graph shows the correct change in mass of reactant used in excess against time?

16.

Multiple Choice

2 mins

1 pt

Diagram shows the apparatus set up for an experiment to determine the rate of reaction.

Which of the following techniques is the most suitable to determine the rate of reaction?

Record the time as soon as precipitate is formed

Record the time taken to obtain the maximum temperature

Record the times as soon as the cross mark cannot be seen

Record the times taken for the change of the pH value until a fixed pH value is obtained

17.

Multiple Choice

2 mins

1 pt

The reaction between zinc, Zn and hydrochloric acid, HCl is represented by the following equation.

Zn + 2HCl --> ZnCl₂ + H₂

A student wants to determine the rate of reaction in a school laboratory. Which of the following methods is the most suitable?

Determine the change in temperature of the solution with time

Determine the change in the concentration of zinc chloride with time

Determine the volume of hydrogen gas given off with time

Determine the change in the concentration of hydrochloric acid with time

18.

Multiple Choice

2 mins

1 pt

The following equation represents the reaction between calcium carbonate, CaCO₃ and hydrochloric acid, HCl.

CaCO₃ + 2HCl --> CaCl₂ + CO₂ + H₂O

Which changes can be used to determine the rate of reaction?

I : mass of calcium carbonate per unit time

II : Volume of carbon dioxide released per unit time

III : Colour of solution per unit time

IV : Mass of precipitate produced per unit time

I and II

I and III

II and IV

III and IV

19.

Multiple Choice

2 mins

1 pt

Diagram shows a graph of volume of oxygen gas collected against time in the decomposition reaction of hydrogen peroxide when using manganese dioxide as catalyst.

Which point shows the highest rate of reaction?

P

Q

R

S

20.

Multiple Choice

2 mins

1 pt

Diagram shows a graph to study the effect of total surface area on the rate of reaction.

What is represented by gradient tangent X?

Average rate of reaction in the first 2 minutes

Average rate of reaction in the 2nd minute

Overall average rate of reaction

Rate of reaction at the 2nd minute

21.

Multiple Choice

30 sec

1 pt

What does collision thoery mean?

How quickly particles collide

How much energy colliding particles have

22.

Multiple Choice

30 sec

1 pt

What does NOT happen when the temperature is increased?

Particles collide more often

Particles collide with more energy

Particles move faster

More particles collide in the correct orientation

23.

Multiple Choice

30 sec

1 pt

How can you increase the rate of a reaction

Decrease the pressure

Increase the rate of collisions

Decrease the concentration

Increase the concentration

24.

Multiple Choice

30 sec

1 pt

Why does a higher concentration increase the rate of reaction?

it increases the amount of reactants

it lowers the activation energy

it increases the energy of particle collisions

it increases the frequency of particle collisions

25.

Multiple Choice

30 sec

1 pt

Why does a higher temperature increase the rate of a reaction?

it increases both the frequency and energy of particle collisions

it only increases the frequency of particle collisions

it only increases the energy of particle collisions

it reduces the activation energy of the reaction

26.

Multiple Choice

30 sec

1 pt

As the frequency of ______________ increases, the rate of reaction increases.

Time

Reactions

Collisions

Reactants

27.

Multiple Choice

30 sec

1 pt

The minimum amount of energy needed for colliding particles to react is called

Chemical Energy

Kinetic Energy

Activation Energy

Potential Energy

28.

Multiple Choice

1 min

1 pt

In an experiment, a 2 g lump of zinc and 2 g of powdered zinc are added separately to equal volumes of dilute sulphuric acid. The solid line on the graph shows the volume of gas given off when the 2 g lump is used. Which dotted line is obtained when the zinc is powdered?

A

B

C

D

29.

Multiple Choice

1 min

1 pt

A liquid X reacts with solid Y to form a gas.
Which two diagrams show suitable methods for investigating the speed of the reaction?

1 and 3

1 and 4

2 and 3

2 and 4

30.

Multiple Choice

1 min

1 pt

A student investigated the rate of reaction of calcium carbonate with dilute hydrochloric acid. Every minute, the student recorded the total volume of carbon dioxide produced, until some time after the reaction was complete.
Which graph shows the correct results?

A

B

C

D

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