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Chemical Reactions Quiz

Last updated almost 7 years ago

5 questions

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Question 1

1.

What characteristics do endthermic reactions have? (select all that apply)

Aborb heat

Temperature increases

Release heat

Temperature decreases

Question 2

2.

What characteristics do exothermic reactions have? (select all that apply)

Absorb heat

Temperature increases

Releases heat

Temperature decreases

Question 3

3.

Select two examples of endothermic reactions.

Cooking an egg

Melting ice cubes

Wood burning

Explosive dynamite

Question 4

4.

Select two examples of exothermic reactions.

Baking soda and vinegar reacting

Hand warmers

Wood burning

Photosynthesis

Question 5

5.

Balance the following equation. Use a separate sheet of paper to show your work.
Pb(OH)2 + HCl → H2O + PbCl2

 ____ Pb(OH)2 + __2__ HCl → __2__ H2O + ____ PbCl2 

 ____ Pb(OH)2 + __3__ HCl → __2_ H2O + _1___ PbCl2 

 _2__ Pb(OH)2 + ____ HCl → __2__ H2O + ____ PbCl2 

It's alread balanced