Question 1

Which of the following is not a pure substance?

Accepted Answer

A)  pure gold 
B)  clean air 
C)  refined sugar 
D)  distilled water 
A)  pure gold 
B)  clean air 
C)  refined sugar 
D)  distilled water

Question 2

Which of the following is not a chemical change?

Accepted Answer

A)  burning charcoal 
B)  rusting iron 
C)  melting ice 
D)  baking bread 
A)  burning charcoal 
B)  rusting iron 
C)  melting ice 
D)  baking bread

Question 3

Most samples of matter occur in nature as

Accepted Answer

A)  elements 
B)  compounds 
C)  homogeneous samples 
D)  mixtures 
A)  elements 
B)  compounds 
C)  homogeneous samples 
D)  mixtures

Question 4

What is the coefficient in front of iron when the following equation is balanced? Fe + O2 $\rightarrow$Fe2O3

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  6 
A)  1 
B)  2 
C)  4 
D)  6

Question 5

Which of the following sets, is a list of the symbols for an element and a compound (in that order)?

Accepted Answer

A)  Mg, CO 
B)  CO, CO2 
C)  CO, Co 
D)  H2O2, P 
A)  Mg, CO 
B)  CO, CO2 
C)  CO, Co 
D)  H2O2, P

Question 6

Sublimation is a characteristic physical property of

Accepted Answer

A)  chlorine (Cl2, liquid) 
B)  oxygen (O2, gas) 
C)  bromine (Br2, liquid) 
D)  iodine (I2, solid) 
A)  chlorine (Cl2, liquid) 
B)  oxygen (O2, gas) 
C)  bromine (Br2, liquid) 
D)  iodine (I2, solid)

Question 7

A pure substance which can be decomposed into two or more pure substances is a(n)

Accepted Answer

A)  element 
B)  mixture 
C)  compound 
D)  atom 
A)  element 
B)  mixture 
C)  compound 
D)  atom

Question 8

Which prefix has the meaning 10-3?

Accepted Answer

A)  mega 
B)  nano 
C)  centi 
D)  milli 
A)  mega 
B)  nano 
C)  centi 
D)  milli

Question 9

How would you separate a mixture of salt, sand, and water?

Accepted Answer

A)  by filtration, followed by evaporation 
B)  freezing, followed by melting 
C)  separating with tweezers, followed by evaporation 
D)  by filtration, followed by burning 
A)  by filtration, followed by evaporation 
B)  freezing, followed by melting 
C)  separating with tweezers, followed by evaporation 
D)  by filtration, followed by burning

Question 10

Which of the following elements is a metal?

Accepted Answer

A)  Ca, calcium 
B)  Na, sodium 
C)  Hg, mercury 
D)  all of these 
A)  Ca, calcium 
B)  Na, sodium 
C)  Hg, mercury 
D)  all of these

Which of the following is not a pure substance?

Which of the following is not a chemical change?

Most samples of matter occur in nature as

What is the coefficient in front of iron when the following equation is balanced? Fe + O₂ $\rightarrow$ Fe₂O₃

Which of the following sets, is a list of the symbols for an element and a compound (in that order)?

Sublimation is a characteristic physical property of

A pure substance which can be decomposed into two or more pure substances is a(n)

Which prefix has the meaning 10^-3?

How would you separate a mixture of salt, sand, and water?

Which of the following elements is a metal?

Living in a World of Chemistry

Atoms and the Periodic Table

The Air We Breathe

Chemical Bonding and States of Matter

Carbon Dioxide and the Greenhouse Effect

Chlorofluorocarbons and the Ozone Layer

Chemical Reactivity: Chemicals in Action

Acid-Base Reactions

Oxidation-Reduction Reactions

Water, Water Everywhere but Not a Drop to Drink

Energy and Hydrocarbons

Nuclear Changes and Nuclear Power

Organic Chemicals and Polymers

The Chemistry of Life

Nutrition: the Basis of Healthy Living

Chemistry and Medicine

The Chemistry of Useful Materials

Filters

Exam 2: The Chemical View of Matter

Which of the following is not a pure substance?

Which of the following is not a chemical change?

Most samples of matter occur in nature as

What is the coefficient in front of iron when the following equation is balanced? Fe + O2 →\rightarrow→ Fe2O3

Which of the following sets, is a list of the symbols for an element and a compound (in that order)?

Sublimation is a characteristic physical property of

A pure substance which can be decomposed into two or more pure substances is a(n)

Which prefix has the meaning 10-3?

How would you separate a mixture of salt, sand, and water?

Which of the following elements is a metal?

Living in a World of Chemistry

Atoms and the Periodic Table

The Air We Breathe

Chemical Bonding and States of Matter

Carbon Dioxide and the Greenhouse Effect

Chlorofluorocarbons and the Ozone Layer

Chemical Reactivity: Chemicals in Action

Acid-Base Reactions

Oxidation-Reduction Reactions

Water, Water Everywhere but Not a Drop to Drink

Energy and Hydrocarbons

Nuclear Changes and Nuclear Power

Organic Chemicals and Polymers

The Chemistry of Life

Nutrition: the Basis of Healthy Living

Chemistry and Medicine

The Chemistry of Useful Materials

Filters

What is the coefficient in front of iron when the following equation is balanced? Fe + O₂ $\rightarrow$ Fe₂O₃

Which prefix has the meaning 10^-3?