Chapter 15 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

If it is brittle, dissolves easily in water, has a high melting point and conducts electric current, it is a(n)

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Which compound has the weaker chemical bond?

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Sugar is a covalent compound that dissolves in water but does not form ions, so it

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What substances can acids react with to produce hydrogen gas?

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Acids have a

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When all the molecules of an acid break apart in water, the solution is called a

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When acids and bases come in contact with each other, they

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Brittleness and a high melting point are two properties of

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What substance has a sour taste and produces hydrogen gas when it reacts with some metals?

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If almost all the molecules of an acid break apart when dissolved in water, the acid is

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Over 90% of compounds are what type?

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Biochemicals composed of one or more simple sugar molecules are called

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Hemoglobin, which carries oxygen in the blood, is a

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Glucose is a

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Which of the following, in equal concentrations, has the lowest pH?

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What compounds are brittle and have high melting points?

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Why should you never taste or touch an unknown acid?

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What do foods that taste sour usually contain?

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What compound, used in cleaners, feels slippery?

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In what type of solution do all of the molecules of a base break apart in water?

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What is left when a base and an acid neutralize?

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What kind of melting point do covalent compounds have?

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A factory that has not followed pollution control standards has been operating in an area that did not have such a factory before. Plants that used to grow well are not doing well. Fish in a nearby river are dying at a higher rate than usual. Why?

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What property of an ionic compound does the crystal lattice shape contribute to?

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Since you know that most calcium hydroxide molecules break apart in water, decide which number on the pH scale would best describe the water that cement finishing tools were washed in?

COMPLETION
-Complete the following questions by selecting the correct answer from the 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)  

Word Bank

proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,             
           brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,            
             lipids,         nucleic acids,                  biochemicals,               organic compounds                   

2

When electrons are shared between atoms of two different elements, ________________________ compounds are formed.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

Enzymes are _______________________ that increase the rate of chemical reactions in biological systems.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

RNA is a(n) ____________________ that plays an active role in protein synthesis.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

Organic compounds made by living things are called ________________________________.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

When you pour a liquid covalent compound into water and the liquid rises and floats on the water, you are demonstrating that _____________________ is not a property of most covalent compounds.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

Magnesium oxide is an example of the high __________________________ of ionic compounds, because it changes to a liquid at 2,800o Celsius.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

Ionic compounds have the property of _____________________ because of their crystal lattice shape.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

If it weren't dangerous to taste them, a good test of weather a substance is an acid or a base would be the __________________.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

Acids can create ___________________ by reacting with metals.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

The terms acids, bases and salt have to do with the ________________________ when H+ ions meet OH- ions and form water.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

Strong __________________ include sulfuric, nitric and hydrochloric; weak ones include acetic, citric and carbonic.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

If your hair is curly, you're tall and have brown eyes, it is because of the information in your _______________________.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

There are more ___________________ than any of the other three catagories of biochemicals, which is good because they regulate many of the functions of the body.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

The reason celery stalks stand straight is the _________________________, which provide the structure.

 
Word Bank
proteins,                 base,                    acid,                 ionic,                  salt,                    nucleic acid,                covalent,                         brittleness,     solubility,           melting point,          boiling point,               electrical conductivity,             flavor,              hydrogen gas,       helium gas,         indicator,                 buffer,          acids,         reaction,               bases,      carbohydrates,                          lipids,         nucleic acids,                  biochemicals,               organic compounds      

2

People need some ________________ to store energy.

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

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a covalently bonded compound that has carbon-based molecules

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an organic compound composed of only carbon and hydrogen

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a class of energy giving nutrients that includes sugars, starches and fiber

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a type of biochemical that does not dissolve in water, includes fats and steroids

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an organic compound that is made of one or more chains of amino acids and is in all cells

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an organic compound, either RNA or DNA, whose molecules are made up of one or two chains of nucleotides

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composed of amino acids

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includes fats, oils and waxes

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includes sugars, starches and fiber

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sometimes called the blueprints of life

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