Chemical equations and Chemical Reactions 2

AB + CD →AD + CB

• Double Replacement

• Single Replacement

• Synthesis

• Decomposition

Identify this type of reaction,
Cl₂ + 2KI _-->  I₂ + 2KCl

• Synthesis

• Single displacement

• Double displacement

• Decomposition

2 C₅H₅ + Fe --> Fe(C₅H₅)₂ 

• single displacement

• double displacement

• decomposition

• synthesis

Which chemical reaction breaks down into 2 substances?

• Double displacement

• Single displacement

• Synthesis

• Decomposition

A + BC →B + AC

• Single Replacement

• Decomposition

• Double Replacement

• Synthesis

Which of the following is a sign that a chemical reaction has occurred?

• change in shape

• melting

• formation of a gas

• dissolving

Which of the following describes a precipitate?

• a liquid forms when a block of metal is heated

• a solid forms when one liquid is poured into another

• a gas forms when a solid is placed in a liquid

• bubbles form when an acid is poured on a rock

During Photosynthesis energy is absorbed. What kind of reaction is it?

• Physical

• Exothermic

• Endothermic

• Photothermic

In an exothermic reaction, energy is _________.

• Released

• Absorbed

• Stored

• Doubled

You are given two jars, each of which contains an unknown substance. You are asked to determine if the substances are different from one another or if each jar contains the same substance. What should you do to complete this task? 

• Compare the appearances of the substances. If the substances look the same, then they are the same. 

• Compare only some of the physical properties of the substances. If the substances have the same density, then they are the same. 

• Compare both the physical and the chemical properties of the substances. If the substances perform the same in a variety of tests, then they are the same. 

• Compare the physical states of the substances. If the substances are in the same state, then they are the same.