Chemistry 9th Chap 8 : Test Yourself

Chemistry Chapter 8 : Test Yourself

1 / 5

If the ΔH value is negative than reaction will be:

A) None of these

B) Exothermic

C) May or may not be Exothermic or Endothermic

D) Endothermic

2 / 5

All chemical reactions involve:

A) Catalysts

B) Energy changes

C) Enzymes

D) All of these

3 / 5

Which is not released in an aerobic respiration?

A) Lactic acid

B) Water

C) Carbon dioxide

D) Energy

4 / 5

A catalyst increases the rate of a chemical reaction by:

A) increasing the enthalpy of reaction

B) None of these

C) Decreasing the enthalpy of reaction

D) increasing activation energy

5 / 5

Activation energy of a chemical reaction must be ________ the average kinetic energy of reacting molecules:

A) Lower than

B) None of these

C) equal to

D) greater than

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