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WorksheetsGeneral Chemistry Quiz
Total questions: 37
Worksheet time: 19mins
If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) __________.
element
homogeneous mixture
compound
heterogeneous mixture
mixture of elements
The symbol for the element potassium is __________.
Ca
K
P
Se
Pt
The SI unit of temperature is __________.
°C
K
°F
T
t
The density of silver is 10.5 g/cm3. A piece of silver that occupies a volume of 23.6cm3 would have a mass of __________g.
2.25
23.6
0.445
248
112
The number 0.00430 has __________ significant figures.
6
4
2
5
3
The correct result (indicating the proper number of significant figures) of the following addition is __________.
13
13.3
13.33
13.332
none of the above
There are __________ significant figures in the answer to the following computation: (29.2 - 20.0) (1.79 × 10^5)
1
2
3
4
5
Methane and ethane are both made up of carbon and hydrogen. In methane, there are 12.0 g of carbon for every 4.00 g of hydrogen, a ratio of 3:1 by mass. In ethane, there are 24.0 g of carbon for every 6.00 g of hydrogen, a ratio of 4:1 by mass. This is a statement of the law of __________.
conservation of matter
conservation of mass
octaves
multiple proportions
constant composition
Which statement below correctly describes the responses of alpha, beta, and gamma radiation to an electric field?
Both beta and gamma are deflected in the same direction, while alpha shows no response.
Only alpha is deflected, while beta and gamma show no response.
Alpha and beta are deflected in opposite directions, while gamma shows no response.
Both alpha and gamma are deflected in the same direction, while beta shows no response.
Both alpha and beta are deflected in the same direction, while gamma shows no response.
Which pair of atoms constitutes a pair of isotopes of the same element?
14 6 X 14 7 X
14 6 X 12 6 X
19 10 X 19 9 X
20 10 X 21 11 X
17 9 X 17 8 X
The element __________ is the most similar to strontium in chemical and physical properties.
Li
Cs
Ba
At
Rb
Elements in Group 2A are known as the __________.
noble gases
alkali metals
halogens
alkaline earth metals
chalcogens
When a metal and a nonmetal react, the __________ tends to lose electrons and the __________ tends to gain electrons.
nonmetal, metal
metal, metal
nonmetal, nonmetal
metal, nonmetal
None of the above, these elements share electrons.
What is the formula of the compound formed between strontium ions and nitrogen ions?
Sr2N3
SrN
SrN3
Sr3N2
SrN2
The correct formula for molybdenum(IV) hypochlorite is __________.
Mo(ClO4)4
Mo(ClO3)4
MoCl4
Mo(ClO)4
Mo(ClO2)4
If matter is uniform throughout and cannot be separated into other substances by physical means, it is __________.
either an element or a compound
a heterogeneous mixture
a compound
an element
a homogeneous mixture
Which of the following are chemical processes?
1, 2
2, 3, 4
1, 4
1, 3, 4
1, 3
Precision refers to __________.
how close a measured number is to the true value
how close a measured number is to infinity
how close a measured number is to zero
how close a measured number is to the calculated value
how close a measured number is to other measured numbers
Which one of the following is not one of the postulates of Dalton's atomic theory?
All atoms of a given element are identical; the atoms of different elements are different and have different properties.
Atoms of an element are not changed into different types of atoms by chemical reactions: atoms are neither created nor destroyed in chemical reactions.
Atoms are composed of protons, neutrons, and electrons.
Compounds are formed when atoms of more than one element combine.
The gold foil experiment performed in Rutherford's lab __________.
utilized the deflection of beta particles by gold foil
confirmed the plum-pudding model of the atom
led to the discovery of the atomic nucleus
was the basis for Thompson's model of the atom
proved the law of multiple proportions
There are __________ electrons, __________ protons, and __________ neutrons in an atom of 132 54 Xe.
78, 78, 132
78, 78, 54
54, 54, 78
54, 54, 132
132, 132, 54
In the modern periodic table, the elements are arranged in __________.
order of increasing neutron content
reverse alphabetical order
alphabetical order
order of increasing atomic number
order of increasing metallic properties
The net ionic equation for formation of an aqueous solution of NiI2 accompanied by evolution of CO2 gas via mixing solid NiCO3 and aqueous hydriodic acid is __________.
NiCO3(s) + 2HI (aq) → H2O (l) + CO2 (g) + Ni2+(aq) + 2I-(aq)
NiCO3(s) + 2HI (aq) → 2H2O (l) + CO2 (g) + NiI2(aq)
2NiCO3(s) + HI (aq) → 2H2O (l) + CO2 (g) + 2Ni2+(aq)
NiCO3(s) + I-(aq) → 2H2O (l) + CO2 (g) + Ni2+(aq) + HI (aq)
NiCO3(s) + 2H+(aq) → H2O (l) + CO2 (g) + Ni2+(aq)
Which of the following is soluble in water at 25°C (room temperature)?
Fe(OH)2
FeS
FeCO3
Fe(NO3)2
Fe3(PO4)2
Which combination will produce a precipitate?
NaCl (aq) and HC2H3O2 (aq)
NH4OH (aq) and HCl (aq)
NaOH (aq) and Fe(NO3)2 (aq)
AgNO3 (aq) and Ca(C2H3O2)2 (aq)
NaOH (aq) and HCl (aq)
Which one of the following is a weak acid?
HCl
HF
HNO3
HClO4
HI
The balanced reaction between aqueous nitric acid and aqueous strontium hydroxide is __________.
HNO3(aq) + Sr(OH)2(aq) → Sr(NO3)2(aq) + H2(g)
2HNO3(aq) + Sr(OH)2(aq) → Sr(NO3)2(aq) + 2H2(g)
HNO3(aq) + SrOH(aq) → H2O(l) + SrNO3(aq)
2HNO3(aq) + Sr(OH)2(aq) → 2H2O(l) + Sr(NO3)2(aq)
HNO3(aq) + Sr(OH)2(aq) → H2O(l) + Sr(NO3)2(aq)
In which species does sulfur have the highest oxidation number?
S8 (elemental form of sulfur)
K2SO4
SO2
H2S
H2SO3
It is a mixture with a uniform composition and exhibits the same properties in different parts of the mixture
homologous mixture
heterogenous mixture
homogenous mixture
mixture
Which of the following is a strong acid?
Acetic acid
Hydrochloric acid
Ammonia
Ammonia
What is the main function of a burette in a titration experiment?
To mix solutions
To measure pH
To deliver precise volumes of titrant
To heat solutions
Which instrument is most commonly used to measure the absorbance of a solution?
pH meter
Conductivity meter
Spectrophotometer
Centrifuge
What is the first step if a chemical spills on your skin?
Inform your supervisor
Wipe it off with a cloth
Rinse immediately with water for at least 15 minutes
Apply lotion
Which of the following is used to separate a solid from a liquid in a suspension?
Distillation
Filtration
Titration
Chromatography
The main hazard associated with working with volatile organic solvents is:
Burns
Electrical shock
Inhalation of toxic fumes
Frostbite
Which of the following is an endothermic process?
Condensation
Freezing
Evaporation
Combustion
Which chemical is commonly used as a drying agent in desiccators?
Sodium hydroxide
Sodium chloride
Calcium chloride
Potassium permanganate
