EXOTHERMIC AND ENDOTHERMIC REACTION WS1
joel iheanacho 
EXOTHERMIC AND ENDOTHERMIC REACTION WS1
study the questions and choose the right option
Which of the following statements best describes an exothermic reaction?
A reaction that absorbs heat from its surroundings
A reaction that releases heat to its surroundings
A reaction that produces light
A reaction that requires a catalyst
In an exothermic reaction, the energy of the products is _______ than the energy of the reactants.
greater
less
equal
unpredictable
Which of the following is an example of an exothermic reaction?
Baking a cake
Melting ice
Photosynthesis
Boiling water
Which of the following statements best describes an endothermic reaction?
A reaction that absorbs heat from its surroundings
A reaction that releases heat to its surroundings
A reaction that produces light
A reaction that requires a catalyst
In an endothermic reaction, the energy of the products is _______ than the energy of the reactants.
greater
less
equal
unpredictable
Which of the following is an example of an endothermic reaction?
Burning wood
Condensation
Photosynthesis
Freezing water
A chemical reaction that absorbs heat from its surroundings is classified as _______.
Exothermic
Endothermic
Neutral
Catalytic
Which of the following is not a factor that can affect the rate of a chemical reaction?
Temperature
Concentration of reactants
Presence of a catalyst
Color of the reactants
The reaction rate of a chemical reaction generally increases with _______.
Decreasing temperature
Increasing concentration of reactants
Adding a catalyst
Changing the color of the reactants
when exothermic reaction occur, the temperature _______
decrease
increase
remains unchanged
is usually 40 degree
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