➕ Chemistry - Physical v. Chemical Change/Rxns Flashcards
Based on the table, which of Mark’s observations would show that a burning candle is a physical reaction?
A) Black smoke is given off; hot gases are rising.
B) The wax starts to melt.
C) The flame glows red and orange.
D) Time passes one minute at a time.
B) The wax starts to melt.
Based on the table, which of Mark’s observations would show that a burning candle is a chemical reaction?
A) Black smoke is given off; hot gases are rising.
B) The wax starts to melt.
C) The flame glows red and orange.
D) Time passes one minute at a time.
A) Black smoke is given off; hot gases are rising.
Changes that produce new kinds of matter with different properties are:
A) Chemical
B) Physical
A) Chemical
A change that can be easily reversed is:
A) Chemical
B) Physical
B) Physical
When a new substance is created, the change is:
A) Chemical
B) Physical
A) Chemical
A process that is NOT easily reversed is:
A) Chemical
B) Physical
A) Chemical
Burning a match is an example of a:
A) Chemical change
B) Physical change
A) Chemical change
Milk that sours is an example of a:
A) Chemical change
B) Physical change
A) Chemical change
The cooking of food is an example of a:
A) Chemical change
B) Physical change
A) Chemical change
Boiling water is an example of a:
A) Chemical change
B) Physical change
B) Physical change
Silver melting is an example of a:
A) Chemical change
B) Physical change
B) Physical change
Cutting paper is an example of a:
A) Chemical change
B) Physical change
B) Physical change
Freezing water is an example of a:
A) Chemical change
B) Physical change
B) Physical change
Which answer includes all the following that are chemical changes and NOT physical changes?
- freezing of water
- rusting of iron
- dropping a piece of iron into hydrochloric acid (H2 is produced)
- burning a piece of wood
- emission of light by a kerosene oil lamp
(a) 3 and 4
(b) 2 and V5
(c) 1, 2, 3, 4, and 5
(d) 2, 3, and 4
(e) 2, 3, 4, and 5
(e) 2, 3, 4, and 5
Which response lists all of the following properties of sulfur that are physical properties and not other properties?
- It reacts with hydrogen when heated.
- It is a yellow solid at room temperature.
- It is soluble in carbon disulfide.
- Its density is 2.97 g/cubic centimeter
- It melts at 112°C.
(a) 2, 3, 4, 5
(b) 2, 4, and 5
(c) 1
(d) 2, 3, and 4
(e) 3, 4, and 5
(a) 2, 3, 4, 5
