Rate of reation

Which is the measure of how fast a reaction takes place?

A. Rate of reaction

B. Chemical substance

C. Substance

D. Chemical reaction

• A

• B

• C

• D

How many factors affect the rate of reaction?

A. 3

B. 4

C. 5

D. 6

• A

• B

• C

• D

There are several factors below:

1. Concentration

2. Surface area

3. Catalyst

4. Equipment

Which are the factors affect the rate of reaction?

A. 1,2 and 3

B. 1 and 3

C. 2 and 4

D. All the number are true

• A

• B

• C

• D

which is a substance that increase the rate of a chemical reaction but itself remains unchanged at the end of the reaction?

A. Element

B. Compound

C. Catalyst

D. Surface area

• A

• B

• C

• D

Which is the effect of increasing the surface area of a solid reactant on the rate of reaction?

A. Decrease the rate of reaction

B. Has no effect on the rat eof reaction

C. Increase the rate of reaction

D. Depend on the condition of chemical reaction

• A

• B

• C

• D

Which is the meaning of "more solid reactant"?

A. More finely powdered

B. More energy on the chemical reaction

C. More vibrations of particles

D. More gas consume

• A

• B

• C

• D

Why the solid powder has rate of reaction higher than large piece?

A. Because solid powder has lower surface area than large piece

B. Becuase solid powder has hight surface area than large piece

C. Because solid powder can not mix with solution

D. Unidentified

• A

• B

• C

• D

Michael has large piece of marble and the side is 2 cm. If the michael want make the small piece of marble and the side is 1 cm. How many small piece of marble?

A. 8

B. 12

C. 16

D. 20

• A

• B

• C

• D

How the way to increase the concnetrations of reactants?

A. Add the solid reactants

B. Add the temperature on flask

C. Add the pressure on flask

D. Add some catalysts

• A

• B

• C

• D

Why does increasing the concentration of a reactant increase the rate of a chemical reaction?

A. It decreases the number of collisions between the reactants

B. It increases the activation energy of the reaction

C. It increases the number of collisions between the reactants

D. It makes the reaction less exothermic

• A

• B

• C

• D