Chapter 14 Test - Craig Fisher | Library

 
MULTIPLE CHOICE
-Choose the correct answer by clicking on your answer choice. Only one answer is correct. (2 pts. each) 

2

Which of the following is NOT a sign of a chemical reaction?

2

What causes chemical bonds in molecules to break?

2

A calcium carbonate molecule has 1 calcium (Ca) atom, 3 oxygen (O) atoms, and 1 carbon (C) atom. Which of the following shows the chemical formula for calcium carbonate?

2

What is the charge of an ionic compound?

2

Which of the following uses coefficients correctly to balance the equation N2 + H2 ------> NH3 ?

2

Which of the following states the law of conservation of mass?

2

Nitrogen dioxide is a covalent compound. How many oxygen atoms are in a nitrogen dioxide molecule?

2

An ion is

2

Which of the following will NOT increase the rate of a chemical reaction?

2

Which of the following chemical equations shows an endothermic reaction?

2

Which of the following is NOT an example of a chemical reaction?

2

Which of the following phrases describes a catalyst?

2

Which of the following examples shows where a coefficient is used correctly to balance the equation?

2

In which kind of chemical reaction do two or more substances combine to form one new compound?

2

Which of the following is an example of a chemical reaction?

2

What is O2 an example of?

2

Which of the following equations is an example of a single-displacement reaction?

2

How can the rate of a reaction be increased?

2

How can you be sure a chemical reaction is happening?

2

Which of the following is an example of a diatomic molecule?

2

What does a prefix in a chemical formula represent in an element?

2

Which of the following usually increases the rate of a reaction?

2

Which of the following chemical reactions illustrates a decomposition reaction?

2

Which of the following chemical reactions illustrates an endothermic reaction?

2

Which of the following is an example of chemical bonds breaking?

 
COMPLETION
-Complete the following questions by selecting the correct answer from the word bank for questions 32 - 40. Questions 26 - 31 have no word bank. Misspelled words will be marked as incorrect. Some answers may be used more than once, others may not be used at all. (2 pts. each) 

2

A(n) ____________________ is used to balance chemical equations.

2

The number that cannot change to balance a chemical equation is the ______________________.

2

If an energy diagram shows products at a lower energy than the reactants, the diagram shows an ___________________ reaction.

2

In a double-displacement reaction, _______________________ from two compounds exchange places.

2

Energy released in exothermic reactions was first stored in chemical bonds in the ___________________________.

2

Paper will burn at 451o F. For this chemical reaction to begin, 451oF is the _____________________________.

Word Bank

chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 

                          activation energy                       single-displacement                      catalyst              subscript          diatomic

chemical bond                 substances                      molecules                 synthesis                 decomposition            

endothermic                        exothermic                 ions                 reactants                products

2

A shorthand notation that represents a compound or diatomic molecule is called a(n) __________________________.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

The minimum amount of energy needed to start a reaction is called _________________________.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

In a(n) __________________________ reaction, ions in different compounds switch places.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

In a chemical formula, if no ___________________ is written after an element, then only one atom of the element is present.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

A substance that slows down or stops a chemical reaction is called a(n) ________________________.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

The force that holds two atoms together is called a ____________________________.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

When _____________________ bump into one another with enough energy, chemical bonds break.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

When chemical bonds break, the atoms rearrange to form new ____________________.

 
Word Bank
chemical formula                       double-displacement                  coefficient                     inhibitor               chemical reaction 
                         activation energy                       single-displacement                      catalyst              subscript          diatomic
chemical bond                 substances                      molecules                 synthesis                 decomposition            
endothermic                        exothermic                 ions                 reactants                products   

2

A molecule made up of two atoms is ___________________.

 
Matching
-Complete the following matching questions by clicking on the correct answer. Only one answer is correct. (2 pts. each) 

2

something that is needed to break chemical bonds in reactants

2

the smallest amount of energy needed to start a chemical reaction

2

the speed at which new particles form in a chemical reaction

2

something that slows a chemical reaction

2

something that speeds up a chemical reaction

Matching
  -Match the graph labels to the corresponding letters. (2 pts. each)

2

exothermic reaction

2

endothermic reaction

2

activation energy

2

energy absorbed

2

energy released

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