Chemistry Fundamentals Multiple Choice Questions Quiz
Welcome to our Chemistry Fundamentals Quiz! This quiz is designed to test your understanding of the essential concepts in chemistry. Whether you're a student studying for an exam or someone interested in exploring the basics of chemistry, this quiz offers a comprehensive review of fundamental principles. Explore topics such as atomic structure, chemical bonding, periodic trends, and basic reactions through a series of engaging multiple-choice questions.
Each question is carefully crafted to cover key concepts in a clear and concise manner, ensuring an enriching learning experience for participants of all levels. By taking part in this quiz, you'll have the Read moreopportunity to assess your knowledge, identify areas for improvement, and strengthen your foundation in chemistry. Challenge yourself and embark on a journey through the fundamental principles that govern the world of chemistry. Let's dive into the Chemistry Fundamentals Quiz and discover the fascinating world of atoms, molecules, and reactions together!
Chemistry Fundamentals Questions and Answers
- 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
Radon is a radioactive element that has no taste and no color. The actual contact with Radon does not create any harm. Radon is the only non-metal element of period 6 of the periodic table.Rate this question:
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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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Jul 16, 2024Quiz Edited by
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Jun 14, 2016Quiz Created by
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