Free Printable test ch 2 review

Worksheets

test ch 2 review

Total questions: 20

Worksheet time: 10mins

Name

Class

Date

Atoms in molecules share pairs of electrons when they make

polymers

covalent bonds.

ionic bonds.

hydrogen bonds.

What gives water many properties that are important to living things?

specific heat

temperature

hydrogen bonds

density

Which of the following solutions has the highest H+ ion concentration?

a solution with a pH of 10

a solution with a pH of 7

a solution with a pH of 4

a solution with a pH of 1

Which of the following solutions has the lowest H+ ion concentration?

a solution with a pH of 10

a solution with a pH of 7

a solution with a pH of 4

a solution with a pH of 1

Both animal fats and plant oils are made up of glycerol and

saturated fats.

phospholipids.

fatty acids.

polar molecules.

How do ions form?

Atoms gain or lose electrons.

Atoms combine to make a larger atom.

Two atoms share electrons.

Atoms form covalent bonds.

Which substance represented in the figure (A or B) is the solute?

substance A

substance B

both A and B

neither A nor B

Identify the reactants in this reaction: 6H2O + 6CO2 → C6H12O6+ 6O2.

6H2O and 6CO2

6CO2 and C6H12O6

6H2O, C6H12O6, and 6O2

C6H12O6 and 6O2

The activation energy needed for a chemical reaction is decreased by a

substrate.

catalyst.

reactant.

product.

10.

Which property of carbon makes it the “building block of life”?

its hydrogen bonding

its covalent bonding

its ability to dissolve substances

its specific heat

11.

What are the four main groups of carbon-based molecules?

starches, cholesterol, fatty acids, and amino acids

sugars, cellulose, triglycerides, and monosaccharides

carbohydrates, lipids, proteins, and nucleic acids

polysaccharides, sugars, oils, and polymers

12.

Chemical reactions change substances into different substances by

maintaining constant energy.

reaching chemical equilibrium.

breaking and forming bonds.

changing the substance’s properties.

13.

What is the term for the substances that are changed during a chemical reaction?

reactants

products

catalysts

enzymes

14.

What is the result of an endothermic chemical reaction?

no energy absorbed or released

hydrogen bonds are broken down

products have lower bond energy than reactants

more energy absorbed than released

15.

The lock-and-key model of enzyme function shown in the figure illustrates which important characteristic of enzymes?

ability to bond with a product

ability to bind with many reactants

ever-changing structure

precise fit with particular substrates

16.

What kind of bonds link the monomers in a protein?

peptide bonds

protein bonds

hydrogen bonds

ionic bonds

17.

Which type of macromolecule is primarily responsible for storing genetic information?

Lipids

Proteins

Carbohydrates

Nucleic acids

18.

Which property of water allows it to dissolve many substances important for life?

Its nonpolar nature

Its polarity

Its high density

Its low specific heat

19.

What is the primary function of carbohydrates in living organisms?

Forming cell membranes

Speeding up chemical reactions

Providing energy

Storing genetic information

20.

Which of the following best describes a catalyst?

A substance that speeds up a chemical reaction without being consumed

A substance that is used up during a chemical reaction

A substance that changes the products of a reaction

A substance that increases the activation energy of a reaction

100 %

test ch 2 review

Total questions: 20

Worksheet time: 10mins

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