,CHAPTER 1
TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false.
1) The ripening of fruit, once picked, is an example of physical change.
⊚ true
⊚ false
2) An important aim in much chemical work is to use macroscopic measurements in order to
gain an understanding of the microscopic world.
⊚ true
⊚ false
3) The potential energy of a car moving on a level road does not depend on its speed.
⊚ true
⊚ false
4) When a wooden match burns in air, chemical potential energy is converted to kinetic
energy.
⊚ true
⊚ false
5) When applying the scientific method, it is important to avoid any form of hypothesis.
⊚ true
⊚ false
6) When applying the scientific method, a model or theory should be based on experimental
data.
⊚ true
⊚ false
Version 1 1
,7) The numerical value of any temperature expressed in Celsius is always different from the
numerical value of the same temperature in Fahrenheit.
⊚ true
⊚ false
8) The numerical value of any temperature expressed in Celsius is always different from the
numerical value of the same temperature in kelvin.
⊚ true
⊚ false
9) The number 6.0448, rounded to 3 decimal places, becomes 6.045.
⊚ true
⊚ false
10) The number 6.0448, rounded to 2 decimal places, becomes 6.05.
⊚ true
⊚ false
11) The weight of a coin measured as 1.96235 g on one balance is definitely more accurate
than a weight measurement of 1.95 g on another balance.
⊚ true
⊚ false
MULTIPLE CHOICE - Choose the one alternative that best completes the statement or
answers the question.
12) Which one of the following is a “substance” in the sense of the word as used in your
textbook?
Version 1 2
, A) Air
B) Tap water
C) Sea water
D) Water
E) Toothpaste
13) Select the best statement.
A) Physical changes may be reversed by changing the temperature.
B) Physical changes alter the composition of the substances involved.
C) Physical properties are not valid characteristics for identifying a substance.
D) Physical properties are mostly extensive in nature.
E) Physical changes are usually accompanied by chemical changes.
14) Select the best statement.
A) Chemical changes provide the only valid basis for identification of a substance.
B) Chemical changes are easily reversed by altering the temperature of the system.
C) Chemical changes always produce substances different from the starting materials.
D) Chemical changes are associated primarily with extensive properties.
E) Chemical changes are accompanied by changes in the total mass of the substances
involved.
15) Which of the following is a chemical change?
A) Boiling of water
B) Melting wax
C) Broiling a steak on a grill
D) Condensing water vapor into rainfall
E) Carving a piece of wood
Version 1 3
TRUE/FALSE - Write 'T' if the statement is true and 'F' if the statement is false.
1) The ripening of fruit, once picked, is an example of physical change.
⊚ true
⊚ false
2) An important aim in much chemical work is to use macroscopic measurements in order to
gain an understanding of the microscopic world.
⊚ true
⊚ false
3) The potential energy of a car moving on a level road does not depend on its speed.
⊚ true
⊚ false
4) When a wooden match burns in air, chemical potential energy is converted to kinetic
energy.
⊚ true
⊚ false
5) When applying the scientific method, it is important to avoid any form of hypothesis.
⊚ true
⊚ false
6) When applying the scientific method, a model or theory should be based on experimental
data.
⊚ true
⊚ false
Version 1 1
,7) The numerical value of any temperature expressed in Celsius is always different from the
numerical value of the same temperature in Fahrenheit.
⊚ true
⊚ false
8) The numerical value of any temperature expressed in Celsius is always different from the
numerical value of the same temperature in kelvin.
⊚ true
⊚ false
9) The number 6.0448, rounded to 3 decimal places, becomes 6.045.
⊚ true
⊚ false
10) The number 6.0448, rounded to 2 decimal places, becomes 6.05.
⊚ true
⊚ false
11) The weight of a coin measured as 1.96235 g on one balance is definitely more accurate
than a weight measurement of 1.95 g on another balance.
⊚ true
⊚ false
MULTIPLE CHOICE - Choose the one alternative that best completes the statement or
answers the question.
12) Which one of the following is a “substance” in the sense of the word as used in your
textbook?
Version 1 2
, A) Air
B) Tap water
C) Sea water
D) Water
E) Toothpaste
13) Select the best statement.
A) Physical changes may be reversed by changing the temperature.
B) Physical changes alter the composition of the substances involved.
C) Physical properties are not valid characteristics for identifying a substance.
D) Physical properties are mostly extensive in nature.
E) Physical changes are usually accompanied by chemical changes.
14) Select the best statement.
A) Chemical changes provide the only valid basis for identification of a substance.
B) Chemical changes are easily reversed by altering the temperature of the system.
C) Chemical changes always produce substances different from the starting materials.
D) Chemical changes are associated primarily with extensive properties.
E) Chemical changes are accompanied by changes in the total mass of the substances
involved.
15) Which of the following is a chemical change?
A) Boiling of water
B) Melting wax
C) Broiling a steak on a grill
D) Condensing water vapor into rainfall
E) Carving a piece of wood
Version 1 3
