EXERCISE 2-2 Terminology of Chemistry

Click on the correct answer


1 The melting of ice is:
a chemical change
a heterogeneous mixture
a physical change
a compound
none of the previous answers.
2 Vinegar and oil form:
a chemical change
a homogeneous mixture
a physical change
a compound
None of the previous answers.
3 An unsaturated salt solution is:
a heterogeneous mixture
a homogeneous mixture
a physical change
a compound
None of the previous answers.
4 The decomposition of hydrogen peroxide to water and oxygen is:
a chemical change.
a homogeneous mixture
a physical change
a compound
None of the previous answers.
5 Density is a:
an extensive physical property.
a chemical property.
a physical change.
an intensive physical property.
None of the previous answers.
6 Sodium sulfate is:
a homogeneous mixture.
a compound
a mixture of elements.
a substance
b and d
7 Evaporation of mercury is:
Mercury doesn't evaporate.
a chemical change.
a physical change.
a heterogeneous mixture.
None of the previous answers.
8 What color is water?
transparent
clear
white
None of the above answers.
9 Silicon is:
a homogeneous mixture.
an element.
a compound.
a physical property.
None of the previous answers.
10 Mass is:
an extensive physical property.
an intensive physical property.
the same as weight.
None of the previous answers.
11 Which one of the following is a compound?
steel
ozone
cola
glucose
None of the previous answers.
12 Chloride, sulfate, nitrate are:
anions
cations
elements
oxoanions
None of the previous answers.
13 Orange juice is:
a homogeneous mixture
a compound
an unsaturated solution.
a heterogeneous mixture.
None of the previous answers.
14 Calcium, ammonium and tin(II) ions are:
anions
cations
elements
compounds
None of the previous answers.
15 Solids, liquids and gases are:
the only three states of matter
physical properties.
the three common states of matter on earth.
elements
None of the previous answers.
16 Rusting of iron is:
a physical change.
a chemical change.
a compound.
None of the previous answers.
17 Carbon dioxide is:
a mixture of elements.
a homogeneous mixture.
a compound
a heterogeneous mixture.
None of the previous answers.
18 Vodka is:
a homogeneous mixture.
a compound.
a heterogeneous mixture.
an element.
None of the previous answers.
19 Carbonated soda is:
a homogeneous mixture.
an unsaturated solution
a compound.
a heterogeneous mixture.
None of the previous answers.
20 Smog is:
a homogeneous mixture.
an unsaturated solution
a compound.
a heterogeneous mixture.
None of the previous answers.
21 The boiling point is:
an extensive physical property.
an intensive physical property.
a chemical change.
None of the previous answers.
22 Gasoline and water are:
elements.
miscible.
immiscible.
precipitates.
None of the previous answers.
23 Aqueous means:
it swims
in water solution.
without water
None of the previous answers.
24 Hygroscopic and deliquescent mean:
readily absorb water.
hydrophobic
insoluble in water
None of the previous answers.
25 Sublime means:
melts
condenses
goes directly from the solid to the gas.
None of the previous answers.
26 Unsaturated solution means:
more can dissolve.
the solution has all the solute it can dissolve.
it is a heterogenous solution.
None of the previous answers.
27 Anhydrous means:
contains a lot of water.
without water.
an unsaturated solution.
a saturated solution.
None of the previous answers.
28 Accurate results are:
reproducible.
close to each other
very close to the real value.
None of the previous answers.
29 Precise results are:
Easily measured.
close to each other
very close to the real value.
None of the previous answers.
30 Which one of the following is a pure substance?
air
sea water
sodium chloride
aqueous hydrochloric acid
None of the previous answers.
31 Which of the following is a heterogeneous mixture?
unsaturated salt water
sodium chloride
ozone
water
None of the previous answers.
32 Which of the following is a homogeneous mixture?
vodka
orange juice
carbonated soda
smog
None of the previous answers.
33 For the problems that follow, figures that use models of small molecules will be used. In these models, grey represents hydrogen, black - carbon, blue - nitrogen, red - oxygen, green - fluorine and yellow represents sulfur. For the figure to the right, which one of the descriptions best describes the contents of the figure.termimg1.gif
An element in its liquid state.
An element in its gaseous state.
A compound in the gaseous state.
A homogeneous mixture.
An element in its solid state.
34 For the figure to the right, which one of the descriptions best describes the contents of the figure.termimg3.gif
A compound in its liquid state.
A compound in its solid state.
A homogeneous mixture.
A heterogeneous mixture.
An element in its gaseous state.
35 For the figure to the right, which one of the descriptions best describes the contents of the figure. termimg4.gif
A heterogeneous mixture of two elements in their liquid states.
A homogeneous mixture of two compounds in their liquid states.
A heterogeneous mixture of two compounds in their liquid states.
A heterogeneous mixture of two compounds in their solid states.
None of the previous answers.
36 Refering to the figure for the previous question (#35), which is the denser liquid, water or carbon disulfide?
water
carbon disulfide
Not enough information to decide.
37 For the figure to the right, which one of the descriptions best describes the contents of the figure.termimg5.gif
A homogeneous mixture of a compound and an element in the gaseous state.
A heterogeneous mixture of a compound and an element in the gaseous state.
A homogeneous mixture of a compound and an element in the liquid state.
A homogeneous mixture of two elements in the gaseous state.
A homogeneous mixture of two compounds in the gaseous state.
38 The melting and boiling points of hydrogen fluoride are -83oC and 19oC respectively. What is the temperature of the figure to the right? termimg2.gif
<-83oC
The temperature is between -83oC and 19oC.
>19oC
None of the previous answers.
39 For the figure in #38, which one of the descriptions best describes the contents of the figure.
A compound in its solid state.
A compound in its gaseous state.
An element in its liquid state.
A homogeneous mixture of an element and a compound.
None of the previous answers.

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