Chemistry Multiple Choice Questions Scrambled
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- 1.
The particle that has the smallest mass is the
- A.
Electron
- B.
Proton
- C.
Nucleus
- D.
Ion
- E.
Neutron
Correct Answer
A. ElectronExplanation
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- 2.
The person given credit for developing the first modern periodic table is
- A.
Dalton
- B.
Democritus
- C.
Thomson
- D.
Mendeleev
- E.
Chadwick
Correct Answer
D. MendeleevExplanation
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- 3.
Two atoms are isotopes if they have
- A.
Different atomic numbers
- B.
The same mass number, but different atomic numbers
- C.
The same number of protons and neutrons
- D.
The same number of electrons, but a different number of neutrons
- E.
The same atomic number, but a different mass number
Correct Answer
E. The same atomic number, but a different mass numberExplanation
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- 4.
The element found in the periodic table in Group 4 and Period 6 is
- A.
Halfnium, Hf
- B.
Selenium, Se
- C.
Gadolinium, Gd
- D.
Chromium, Cr
- E.
Aluminum, Al
Correct Answer
A. Halfnium, HfExplanation
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- 5.
The element found in the periodic table in Group 6 and period 4 is
- A.
Halfnium, Hf
- B.
Selenium, Se
- C.
Lithium, Li,
- D.
Gadolinium, Gd
- E.
Chromium, Cr
Correct Answer
E. Chromium, CrExplanation
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- 6.
Which of the following matches of group number and common name is incorrect?
- A.
Group 2 - Alkaline Earth Metals
- B.
Group 6 - Lanthanides
- C.
Group 1 - Alkali Metals
- D.
Group 17 - Halogens
- E.
Group 18 - Noble Gases
Correct Answer
B. Group 6 - LanthanidesExplanation
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- 7.
Which of the following matches of group number and common name is incorrect?
- A.
Group 7 - Transition Metals
- B.
Group 2 - Alkali Earth Metals
- C.
Group 17 - Halogens
- D.
Group 2 - Actinides
- E.
Group 18 - Noble Gases
Correct Answer
D. Group 2 - ActinidesExplanation
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- 8.
According to the periodic law, chemical properties are repeated at a regular interval when
- A.
Elements are listed in order of their atomic radius
- B.
Elements are listed in order of their date of discovery
- C.
Families of elements are listed in order
- D.
Periods are arranged in order
- E.
Elements are arranged in order of increasing atomic number
Correct Answer
E. Elements are arranged in order of increasing atomic numberExplanation
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- 9.
A metaloid in Period 3 is
- A.
Scandium
- B.
Aluminum
- C.
Germanium
- D.
Phosphorus
- E.
Silicon
Correct Answer
E. SiliconExplanation
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- 10.
A nonmetal in Period 6 is
- A.
Astatine
- B.
Iodine
- C.
Polonium
- D.
Radon
- E.
Rubidum
Correct Answer
D. RadonExplanation
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- 11.
The atomic mass of barium is due to the number of
- A.
Neutrons and electrons in the nucleus
- B.
Electrons in the nucleus
- C.
Protons and neutrons in the nucleus
- D.
Protons and electrons in the atom
- E.
Protons in the nucleus
Correct Answer
C. Protons and neutrons in the nucleusExplanation
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- 12.
The properties of elements repeat periodically if they are arranged by
- A.
Atomic mass
- B.
Atomic charge
- C.
Atomic number
- D.
Number of neutrons
- E.
Number of electrons
Correct Answer
C. Atomic numberExplanation
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- 13.
The atomic number is the number of
- A.
Protons in the nucleus
- B.
Neutrons in the nucleus
- C.
Protons plus the number of neutrons in the nucleus
- D.
Electrons plus the number of protons in the nucleus
- E.
Electrons plus the number of neutrons in the nucleus
Correct Answer
A. Protons in the nucleusExplanation
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- 14.
Why does atomic radius decrease from left to right in a period?
- A.
Nuclear charge increases from left to right in a period
- B.
Nuclear charge decreases from left to right in a period
- C.
The number of energy levels increase from left to right in a period
- D.
The number of energy levels decreases from left to right in a period
- E.
The number of electrons decreases from left to right in a period
Correct Answer
A. Nuclear charge increases from left to right in a periodExplanation
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- 15.
Why does electron affinity increase from bottom to top in a chemical family?
- A.
Nuclear charge increases from bottom to top in a chemical family
- B.
Nuclear charge decrease from bottom to top in a chemical family
- C.
The number of energy levels increases from bottom to top in a chemical family
- D.
The number of energy levels decreases from bottom to top in a chemical family
- E.
The number of electrons increases from bottom to top in a chemical family
Correct Answer
D. The number of energy levels decreases from bottom to top in a chemical familyExplanation
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- 16.
Which of the following is the most reactive element?
- A.
Helium
- B.
Radon
- C.
Francium
- D.
Hydrogen
- E.
Ununoctium
Correct Answer
C. FranciumExplanation
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- 17.
Why is it easier to remove an electron from potassium than it is to remove an electron from calcium?
- A.
Potassium has a higher electron affinity
- B.
Potassium has a higher ionization energy
- C.
Potassium has a lower nuclear charge
- D.
Calcium has a lower electron affinity
- E.
Calcium is a metal, but potassium is not
Correct Answer
C. Potassium has a lower nuclear chargeExplanation
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- 18.
Which of the following is a practical use of radioisotopes?
- A.
Determining the age of old objects
- B.
Medical diagnosis
- C.
Production of electricity
- D.
All of the above
- E.
None of the above
Correct Answer
D. All of the aboveExplanation
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- 19.
According to the Lewis model of the atom, the number of bonding electrons in a nitrogen atom is
- A.
1
- B.
2
- C.
3
- D.
5
- E.
7
Correct Answer
C. 3Explanation
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- 20.
Which of the following atoms is believed to contain three lone pairs of electrons?
- A.
H
- B.
Al
- C.
B
- D.
C
- E.
Cl
Correct Answer
E. ClExplanation
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- 21.
Multivalent metals
- A.
Can form more than one ion, each with its own charge
- B.
Can exist in several different crystalline forms
- C.
Appear only in the representative metal groups
- D.
Contain more than one populated energy level
- E.
Form an ion whose charge is 2+ or greater
Correct Answer
A. Can form more than one ion, each with its own chargeExplanation
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- 22.
The systematic IUPAC name for HBr(aq) is
- A.
Aqueous bromine
- B.
Aqueous hydrogen bromide
- C.
Hypobromic acid
- D.
Hydrobromic acid
- E.
Bromic acid
Correct Answer
B. Aqueous hydrogen bromideExplanation
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- 23.
Which of the following formulas does not represent a molecular compound?
- A.
CO2
- B.
CoCl2
- C.
SO2
- D.
PCl5
- E.
HCl
Correct Answer
B. CoCl2Explanation
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- 24.
The concept of multiple covalent bonds is used to explain the molecular formula of
- A.
O2
- B.
NaCl
- C.
C2H6
- D.
F2
- E.
NaOH
Correct Answer
A. O2Explanation
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- 25.
The IUPAC name for CaCl2 is
- A.
Calcium chloride
- B.
Calcium (II) chloride
- C.
Calcium dichloride
- D.
Calcium chlorate
- E.
Monocalcium dichloride
Correct Answer
A. Calcium chlorideExplanation
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- 26.
Which of the following is the proper dot diagram for NaCl?
- A.
Refer to the test for this question
- B.
Option 2
- C.
Option 3
- D.
Option 4
Correct Answer
A. Refer to the test for this questionExplanation
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- 27.
An example of a binary compound is
- A.
NaOH
- B.
O2
- C.
H2S
- D.
CaCO3
- E.
Co
Correct Answer
C. H2SExplanation
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- 28.
A compound compoesd of sodium, sulfur, and oxygen would be named
- A.
Sodium peroxide
- B.
Sulfuric acid
- C.
Sodium sulfide
- D.
Sodium sulfate
- E.
Sodium hydroxide
Correct Answer
D. Sodium sulfateExplanation
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- 29.
If the name of a chemical compound ends in "ide", the compound is
- A.
Acidic
- B.
Binary
- C.
Basic
- D.
An oxide
- E.
None of the above
Correct Answer
B. BinaryExplanation
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- 30.
A metallic element X forms a carbonate with the formula X(CO3)2. The corresponding fluoride compound of element X would have the formula
- A.
XF
- B.
XF2
- C.
X4F2
- D.
X4F
- E.
XF4
Correct Answer
E. XF4Explanation
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- 31.
The substance NH3 is a very important industrial chemical. It is used directly as a fertilizer and is also used to produce many other useful chemicals. The IUPAC name of this substance is
- A.
Hydrogen nitride
- B.
Ammonia
- C.
Hydrogen peroxide
- D.
Octane
- E.
Ammonium
Correct Answer
B. AmmoniaExplanation
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- 32.
The IUPAC name for P2I4 is
- A.
Phosphorus iodide
- B.
Diphosphorus tetraiodide
- C.
Tetraphosphorus diiodide
- D.
Phosphorus pentaiodide
- E.
Dipotassium tetraiodide
Correct Answer
B. Diphosphorus tetraiodideExplanation
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- 33.
Hydroselenic acid is a very toxic substance. Its chemical formula is
- A.
HSe
- B.
H2SeO
- C.
H2Se
- D.
H2SeO3
- E.
H2SeO4
Correct Answer
C. H2SeExplanation
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- 34.
The IUPAC name for KMnO4 is
- A.
Krpyton manganese tetraoxide
- B.
Potassium manganate
- C.
Potassium permanganate
- D.
Potassium manganese oxide
- E.
Potassium monomanganese tetraoxide
Correct Answer
C. Potassium permanganateExplanation
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- 35.
The formula for carbon tetrachloride is
- A.
C1Cl4
- B.
C4Cl4
- C.
C1Cl
- D.
CCl4
- E.
C4Cl1
Correct Answer
D. CCl4Explanation
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- 36.
What is the formula for zinc chloride?
- A.
ZnCl
- B.
ZnCl2
- C.
Zn1Cl1
- D.
Zn1Cl2
- E.
Zn2Cl1
Correct Answer
B. ZnCl2Explanation
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- 37.
What is the formula for copper(II) nitrite?
- A.
Cu2(NO3)
- B.
Cu(NO3)2
- C.
Cu(NO2)2
- D.
Cu2(NO2)
- E.
Cu(NO3)
Correct Answer
C. Cu(NO2)2Explanation
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- 38.
An example of a binary compound is
- A.
NaOH
- B.
O2
- C.
H2S
- D.
CaCO3
- E.
Co
Correct Answer
C. H2SExplanation
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- 39.
If XF2 is the correct formula for a metallic fluoride, then the formula for the oxide of X is
- A.
X2O
- B.
XO
- C.
XO4
- D.
XO2
- E.
X2O2
Correct Answer
B. XOExplanation
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- 40.
Which of the following metals would most likely oxidize if a clean metal surface is exposed to the atmosphere?
- A.
Aluminum
- B.
Iron
- C.
Gold
- D.
Silver
- E.
Zinc
Correct Answer
A. AluminumExplanation
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- 41.
The kinetic molecular theory includes all of the following except
- A.
Molecules attract one another
- B.
Particles are small compared to the volume they occupy
- C.
Molecules move in straight line motion
- D.
Molecules collide elastically with one another
- E.
Molecules collide elastically with surrounding objects
Correct Answer
C. Molecules move in straight line motionExplanation
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- 42.
The reaction of silver nitrate with zinc would be classified as a
- A.
Combustion reaction
- B.
Synthesis reaction
- C.
Double displacement reaction
- D.
Decomposition reaction
- E.
Single displacement reaction
Correct Answer
E. Single displacement reactionExplanation
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- 43.
Which of the following combinations would result in the formation of a precipitate?
- A.
Acetic acid and potassium hydroxide solutions
- B.
Magnesium nitrate and sodium sulfide solutions
- C.
Sulfuric acid and barium hydroxide solutions
- D.
Sodium sulfate and copper(II) chloride solutions
- E.
Sodium chloride and ammonium nitrate solutions
Correct Answer
C. Sulfuric acid and barium hydroxide solutionsExplanation
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- 44.
Hydrogen can be used as an alternative fuel for automobiles. Classify the following chemical reaction: 2H2 + O2 = 2H2O
- A.
Combustion reaction
- B.
Decomposition reaction
- C.
Single displacement
- D.
Double displacement
- E.
Simple decomposition
Correct Answer
A. Combustion reactionExplanation
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- 45.
Which of the following always indicates that a chemical reaction has taken place?
- A.
Production of a gas
- B.
Absorption of heat
- C.
Change in colour
- D.
Appearance of a new substance
- E.
Production of heat
Correct Answer
D. Appearance of a new substanceExplanation
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- 46.
Classify the following reaction: Cl2 + ZnI2 = ZnCl2 + I2
- A.
Combustion
- B.
Synthesis
- C.
Decomposition
- D.
Single displacement
- E.
Double displacement
Correct Answer
D. Single displacementExplanation
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- 47.
Classify the following reaction: 2NaClO3 = 2NaCl + 3O2
- A.
Combustion
- B.
Synthesis
- C.
Decomposition
- D.
Single displacement
- E.
Double displacement
Correct Answer
C. DecompositionExplanation
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- 48.
Which metal would not displace gold, Au, from a compound?
- A.
Copper, Cu
- B.
Potassium, K
- C.
Lithium, Li
- D.
Magnesium, Mg
- E.
None of the above
Correct Answer
E. None of the aboveExplanation
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- 49.
Stainless steel is harder than pure iron because
- A.
It is an alloy
- B.
It is metallic
- C.
The electrons in it are free to move
- D.
All of the above
- E.
None of the above
Correct Answer
A. It is an alloyExplanation
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- 50.
The greenhouse effect is caused by
- A.
Infrared radiation
- B.
Ultraviolet radiation
- C.
Water
- D.
Carbon dioxide
- E.
All of the above
Correct Answer
E. All of the aboveExplanation
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Mar 20, 2023Quiz Edited by
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Jun 22, 2016Quiz Created by
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