Speeds of Reactions

Speeds of Reactions

10th Grade

6 Qs

quiz-placeholder

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Speeds of Reactions

Speeds of Reactions

Assessment

Quiz

Chemistry

10th Grade

Hard

NGSS
HS-PS1-5, HS-PS1-4

Standards-aligned

Created by

Charles Martinez

FREE Resource

6 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

Which energy profile diagram shows the slowest endothermic reaction?

A

B

C

D

Tags

NGSS.HS-PS1-4

2.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Media Image

Reaction 1: 10 g of magnesium ribbon with excess 2.0 mol/dm3 hydrochloric acid

Reaction 2: 5 g of magnesium powder with excess 2.0 mol/dm3 hydrochloric acid


In both experiments, the volume of hydrogen produced, V, is measured against time, t, and the results plotted graphically. Which set of graphs is correct?

A

B

C

D

Tags

NGSS.HS-PS1-5

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Aqueous hydrogen peroxide decomposes according to the equation:

2H2O2(aq) → 2H2O(l) + O2(g)

When manganese(IV) oxide is added to an aqueous solution of hydrogen peroxide, the speed of decomposition increases because

the kinetic energy of the hydrogen peroxide molecules increases.

the reaction becomes more exothermic.

the hydrogen peroxide molecules collide more frequently.

the minimum amount of energy which hydrogen peroxide molecules must possess in order to react decreases.

Tags

NGSS.HS-PS1-5

4.

MULTIPLE CHOICE QUESTION

1 min • 1 pt

Media Image

The graph shows a curve S which was obtained from the reaction between excess potassium carbonate and 50 cm3 of 1 mol/dm3 of sulfuric acid carried out at room temperature.


What change to the experiment will not result in curve T?

add 50 cm3 of water to the acid

use bigger lumps of potassium carbonate

use 50 cm3 of 0.75 mol/dm3 sulfuric acid

use 100 cm3 of 1 mol/dm3 nitric acid

Tags

NGSS.HS-PS1-5

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Media Image

What happens to the height of the peak (P) and the activation energy (Ea) when the temperature of the mixture increases?

P: decreases ; Ea : Moves to the left

P: decreases ; Ea : Moves to the right

P: decreases ; Ea : Does not change

P: increases ; Ea : Moves to the left

Tags

NGSS.HS-PS1-5

6.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

Which acid solution, when added to 5 g of zinc granules, would have the highest initial rate of reaction?

25 cm3 of 1.00 mol/dm3 sulfuric acid

25 cm3 of 0.200 mol/dm3 hydrochloric acid

50 cm3 of 1.00 mol/dm3 hydrochloric acid

100 cm3 of 0.100 mol/dm3 sulfuric acid

Tags

NGSS.HS-PS1-5