CHEM 1305 – Home-work 3
1)
Which of the following is a property of both solids and liquids?
A) Definite shape
2)
B) indefinite shape
B) 25 C
5)
6)
D) indefinite volume
C) 250 C
D) 2500 C
The state of matter a substance is in is determined by its ________.
A) electrical conductivity
4)
C) definite volume
Gallium has a melting point of 30 C and boiling point of 2403 C. At which temperature below will
gallium be a gas?
A) 25 C
3)
NAME:
B) density
C) size
D) solubility
E) temperature
Nitrogen gas has a(n) ________ volume and a(n) ________ shape.
A) definite; definite
B) indefinite; definite
C) definite; indefinite
D) indefinite; indefinite
E) insufficient information given to determine
A solid substance is subjected to a number of tests and observations. Which of the following test
results would not be classified as a physical property of the substance?
A) It reacts with base to form water.
B) Its density is 1.84 g/mL.
C) It tastes sour.
D) It is a white-colored solid.
In which of the following pairs of properties are both properties chemical properties?
A) has metallic luster, soluble in ammonia
B) flammable, reacts with acid
C) green in color, reacts violently with water
D) has a high density, is very brittle
7) When a substance undergoes a chemical change it is always true that ________.
A) it condenses
B) it changes state
C) new substances are formed D) heat is absorbed
8) Which of the following is a chemical property?
A) condensation
9)
B) mass
C) solubility
D) burning
E) melting
Which of the following is a chemical change?
A) grating cheese
B) cutting a copper wire into two pieces
C) evaporation of gasoline
D) dissolving salt in water E) rusting of iron
10) Which of the following is not a physical change?
A) boiling water
B) dissolving Kool-aid
C) frying an egg
D) liquefying oxygen
11) Which of the following can be classified as a mixture and not as a pure substance?
I. oxygen
II. Antifreeze
III. distilled water
A) II and V
B) II and III
D) II, IV, and V
E) I and III
IV. human blood
V.brass alloy
C) I only
12) Which is an example of a homogeneous mixture?
A) chocolate chip cookie
B) a rock collection
D) oil & vinegar salad dressing
E) mayonnaise
C) glucose solution
13) A pure substance A is found to change upon heating into two new pure substances, B and C. C can be
decomposed by chemical means, B cannot be decomposed by chemical means. From this we may
conclude that ________.
A) A is an element, B and C are compounds
B) A is a compound, B and C are elements
C) A, B and C are all elements
D) A and C are compounds, B is an element
14) In which of the following sequences of elements do each of the elements have a one-letter symbol?
A) sulfur, vanadium, cobalt
B) chlorine, iron, lithium
C) aluminum, copper, sulfur
D) nickel, yttrium, potassium
E) hydrogen, fluorine, phosphorous
15) In which of the following sequences of elements do each of the elements have a symbol which starts
with a letter not the first letter of the element’s English name?
A) silver, gold, mercury
B) copper, helium, neon
C) cobalt, chromium, sodium
D) argon, iron, lead
16) In which pair does the symbol not match the name of the element?
A) Nitrogen – N
B) Iron – Fe
D) Arsenic – Ar
E) Chromium - Cr
C) Strontium - Sr
For each set of elements choose the appropriate characterization of the set’s elemental symbols from
the response list. Responses may be used more than once or need not be used at all.
17) ________ neon, lithium, scandium
1) all symbols have one letter
18) ________ iron, tungsten, potassium
2) all symbols have two letters
19) ________ oxygen, fluorine, tungsten
3) all symbols start with the same letter
20) ________ cesium, chlorine, copper
4) all symbols start with a letter not the first letter of the
element’s English name