Unit 4 Supplemental Pre Test
This is the supplemental and comprehensive PreTest for your Unit 4 Test. Take your time and answer as best as you can.
- 1.
Atoms are electrically neutral; that is they do not have a charge.
- A.
True
- B.
False
Correct Answer
A. TrueExplanation
Atoms are electrically neutral because they have an equal number of positively charged protons and negatively charged electrons. The positive charge of the protons cancels out the negative charge of the electrons, resulting in a net charge of zero. This means that atoms do not have an overall charge and are therefore electrically neutral.Rate this question:
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- 2.
Electrons have what kind of charge?
- A.
Positive
- B.
Negative
- C.
Neutral
Correct Answer
B. NegativeExplanation
Electrons have a negative charge because they are subatomic particles that carry a fundamental unit of negative electric charge. This charge allows electrons to be attracted to positively charged particles, such as protons, and repelled by other negatively charged particles.Rate this question:
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- 3.
What is the name given to the outermost electron(s)?
- A.
Outside electrons
- B.
Plutonium electrons
- C.
Valence electrons
Correct Answer
C. Valence electronsExplanation
The name given to the outermost electron(s) is valence electrons. Valence electrons are the electrons located in the outermost energy level or shell of an atom. These electrons are involved in chemical bonding and determine the reactivity and chemical properties of an element.Rate this question:
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- 4.
When an electron is added to or removed from an atom, the atom becomes a(n) ________.
- A.
Ion
- B.
Bond
- C.
Nothing; it stays an atom
Correct Answer
A. IonExplanation
When an electron is added to or removed from an atom, the atom becomes an ion. This is because the addition or removal of an electron results in a change in the overall charge of the atom. If an electron is added, the atom becomes negatively charged and is called an anion. If an electron is removed, the atom becomes positively charged and is called a cation.Rate this question:
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- 5.
The process of removing or adding electrons is called __________.
- A.
Work
- B.
Ionization
- C.
Electrification
Correct Answer
B. IonizationExplanation
Ionization is the process of removing or adding electrons to an atom or molecule, resulting in the formation of ions. This can occur through various means such as heating, collision, or exposure to electromagnetic radiation. The process of ionization is important in many scientific and technological applications, including the operation of batteries, the production of plasma, and the formation of chemical compounds.Rate this question:
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- 6.
Positively charged ions, called ____________, result from loss of electrons.
- A.
Cations
- B.
Anions
Correct Answer
A. CationsExplanation
Positively charged ions, called cations, result from the loss of electrons. When an atom loses one or more electrons, it becomes positively charged because there are more protons than electrons. This creates an imbalance of positive and negative charges, leading to the formation of cations. An example is when a sodium atom loses one electron, it forms a sodium cation with a positive charge.Rate this question:
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- 7.
Negatively charged ions, called ____________, result from gain of electrons.
- A.
Cations
- B.
Anions
Correct Answer
B. AnionsExplanation
Negatively charged ions, called anions, result from gain of electrons. When an atom gains one or more electrons, it becomes negatively charged and forms an anion. Anions are attracted to positively charged ions, called cations, and together they form ionic compounds.Rate this question:
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- 8.
An _______ bond forms when a cation transfers its extra electron to an anion who needs it.
- A.
Metallic
- B.
Covalent
- C.
Ionic
Correct Answer
C. IonicExplanation
An ionic bond forms when a cation, which is a positively charged ion, transfers its extra electron to an anion, which is a negatively charged ion, who needs it. This transfer of electrons results in the formation of a strong electrostatic attraction between the two ions, creating an ionic bond. This type of bond typically occurs between a metal and a nonmetal, where the metal donates its electron(s) to the nonmetal, resulting in the formation of a stable compound.Rate this question:
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- 9.
Ions of opposite charge __________ each other easily, so they form a specific pattern called a crystal lattice.
- A.
Repel
- B.
Attract
Correct Answer
B. AttractExplanation
Ions of opposite charge are attracted to each other easily, which is why they form a specific pattern called a crystal lattice.Rate this question:
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- 10.
Ionic bonds always form between metals and ___________.
- A.
Nonmetals
- B.
Metals
- C.
Metalloids
Correct Answer
A. NonmetalsExplanation
Ionic bonds are formed when there is a transfer of electrons from a metal to a nonmetal. Nonmetals have a higher electronegativity compared to metals, meaning they have a greater ability to attract and gain electrons. Metals, on the other hand, have a lower electronegativity and tend to lose electrons. Therefore, the correct answer is nonmetals as they are the ideal partners for metals to form ionic bonds.Rate this question:
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- 11.
1. What is the molecular shape of BI3?
- A.
Tetrahedral
- B.
Trigonal pyramidal
- C.
Linear
- D.
Trigonal planar
- E.
Octahedral
Correct Answer
D. Trigonal planarExplanation
The correct answer is "Trigonal planar." In BI3, the central atom (Boron) is surrounded by three bonding pairs of electrons and no lone pairs. This arrangement gives the molecule a trigonal planar shape, with a bond angle of approximately 120 degrees between each bond.Rate this question:
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- 12.
2. What is the electron geometry of NF3?
- A.
Tetrahedral
- B.
Trigonal pyramidal
- C.
Linear
- D.
Trigonal planar
- E.
Octahedral
Correct Answer
B. Trigonal pyramidalExplanation
NF3 has a central nitrogen atom bonded to three fluorine atoms. The electron geometry is determined by the arrangement of electron pairs around the central atom. In this case, nitrogen has one lone pair and three bonding pairs of electrons. The presence of a lone pair causes the bonding pairs to be pushed closer together, resulting in a trigonal pyramidal electron geometry.Rate this question:
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- 13.
3. What is the molecular shape of C2H2?
- A.
Tetrahedral
- B.
Trigonal pyramidal
- C.
Linear
- D.
Trigonal planar
- E.
Octahedral
Correct Answer
C. LinearExplanation
The molecular shape of C2H2 is linear because it consists of two carbon atoms bonded together by a triple bond. In a linear molecular shape, the atoms are arranged in a straight line with a bond angle of 180 degrees.Rate this question:
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- 14.
Multiple Choice: Name the compound CS4
- A.
Carbon sulfide
- B.
Monocarbon tetrasulfide
- C.
Carbon tetrasulfide
- D.
Monocarbon sulfide
Correct Answer
C. Carbon tetrasulfideExplanation
The compound CS4 is named carbon tetrasulfide because it consists of one carbon atom bonded to four sulfur atoms. The prefix "tetra-" indicates the presence of four sulfur atoms, while "carbon" indicates the presence of one carbon atom. Therefore, the correct name for this compound is carbon tetrasulfide.Rate this question:
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- 15.
Multiple Choice: Name the compound HMnO4
- A.
Permanganic acid
- B.
Manganic acid
- C.
Hydromanganic acid
- D.
Hydropermanganic acid
Correct Answer
A. Permanganic acidExplanation
The compound HMnO4 is named permanganic acid because the prefix "per-" indicates that the compound contains the highest possible oxidation state of manganese (+7). The -ic acid suffix indicates that the compound is an acid. Therefore, permanganic acid is the correct name for HMnO4.Rate this question:
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- 16.
Multiple Choice: Name the compound ZnS
- A.
Zinc sulfur
- B.
Monozinc sulfide
- C.
Monozinc monosulfide
- D.
Zinc sulfide
Correct Answer
D. Zinc sulfideExplanation
The compound ZnS is named zinc sulfide because it consists of the elements zinc (Zn) and sulfur (S). The name of a compound is determined by the elements present in it, and in this case, the compound contains zinc and sulfur, hence it is named zinc sulfide.Rate this question:
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- 17.
Multiple Choice: Name the compound AlPO4
- A.
Aluminum perphosphate
- B.
Aluminum phosphate
- C.
Aluminum phosphite
- D.
Aluminum hypophosphite
Correct Answer
B. Aluminum phosphateExplanation
Aluminum phosphate is the correct answer because the compound AlPO4 consists of one aluminum atom (Al) and one phosphate group (PO4), where the phosphate group is made up of one phosphorus atom (P) and four oxygen atoms (O). Therefore, the compound is named as aluminum phosphate.Rate this question:
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- 18.
Multiple Choice: Name the compound KNO2
- A.
Potassium hyponitrite
- B.
Potassium nitrite
- C.
Potassium nitrate
- D.
Potassium pernitrate
Correct Answer
B. Potassium nitriteExplanation
The compound KNO2 is called potassium nitrite. This is because the symbol K represents potassium, and NO2 represents the nitrite ion. The nitrite ion has a charge of -1, so it combines with the potassium ion, which has a charge of +1, to form a neutral compound. Therefore, the correct name for this compound is potassium nitrite.Rate this question:
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- 19.
Multiple Choice: Name the compound Sn(OH)4
- A.
Tin (IV) hydroxide
- B.
Tin hydroxide
- C.
Stannous hydroxide
- D.
Tin (II) hydroxide
Correct Answer
A. Tin (IV) hydroxideExplanation
The correct answer is tin (IV) hydroxide. This is because the compound Sn(OH)4 contains tin (Sn) in its highest oxidation state, which is +4. The Roman numeral IV represents this oxidation state. Hydroxide (OH) is the polyatomic ion that consists of one oxygen atom and one hydrogen atom, and it is responsible for the hydroxide group in the compound. Therefore, the correct name for Sn(OH)4 is tin (IV) hydroxide.Rate this question:
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- 20.
Multiple Choice: Name the compound NH4HCO3
- A.
Ammonium hydrocarbonate
- B.
Ammonium carbonate
- C.
Ammonium tricarbonate
- D.
Ammonium hydrogen carbonate
Correct Answer
D. Ammonium hydrogen carbonateExplanation
The compound NH4HCO3 is called ammonium hydrogen carbonate. This is because it consists of the ammonium ion (NH4+) and the hydrogen carbonate ion (HCO3-). The name reflects the composition of the compound, with the presence of both ammonium and hydrogen carbonate ions.Rate this question:
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- 21.
Multiple Choice: Name the compound Pb3(BO3)4
- A.
Lead borate
- B.
Lead perborate
- C.
Lead (IV) borate
- D.
Lead (IV) perborate
Correct Answer
C. Lead (IV) borateExplanation
The compound Pb3(BO3)4 is named lead (IV) borate because it contains lead (Pb) ions with a +4 oxidation state and borate (BO3) ions. The Roman numeral IV indicates the +4 oxidation state of lead in the compound.Rate this question:
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- 22.
Multiple Choice: Name the compound C3H8
- A.
Carbon hydrogen
- B.
Carbon hydride
- C.
Tricarbon octahydride
- D.
Carbon octahydride
Correct Answer
C. Tricarbon octahydrideExplanation
The compound C3H8 is called tricarbon octahydride because it consists of three carbon atoms and eight hydrogen atoms. The prefix "tri-" indicates the presence of three carbon atoms, and the prefix "octa-" indicates the presence of eight hydrogen atoms. Therefore, tricarbon octahydride is the correct name for this compound.Rate this question:
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- 23.
Identification: Name the compound MgO2
Correct Answer
magnesium oxideExplanation
The compound MgO2 is named magnesium oxide. This is because it consists of magnesium (Mg) and oxygen (O) atoms, with a 2:1 ratio. When naming compounds, the cation (in this case, magnesium) is named first, followed by the anion (oxygen) with the suffix "-ide". Therefore, the correct name for MgO2 is magnesium oxide.Rate this question:
- 24.
Identification: Name the compound HBrO
Correct Answer
bromic acid
Bromic AcidExplanation
The compound HBrO is named bromic acid or Bromic Acid.Rate this question:
- 25.
Identification: Name the compound NaClO
Correct Answer
sodium chloriteExplanation
Sodium chlorite is the correct answer because the compound NaClO is commonly known as sodium chlorite. It is a white crystalline powder that is used as a disinfectant and bleaching agent. Sodium chlorite is composed of one sodium ion (Na+) and one chlorite ion (ClO-), resulting in the chemical formula NaClO.Rate this question:
- 26.
Identification: Name the compound P2O3
Correct Answer
diphosphorus trioxideExplanation
The compound P2O3 is named diphosphorus trioxide. The prefix "di-" indicates that there are two phosphorus atoms in the compound, and the prefix "tri-" indicates that there are three oxygen atoms. Therefore, the correct name for this compound is diphosphorus trioxide.Rate this question:
- 27.
Identification: Name the compound Cr2(CO3)3
Correct Answer
chromium (III) carbonate
N/AExplanation
The compound Cr2(CO3)3 is named chromium (III) carbonate. This is because the compound contains chromium ions with a +3 charge, indicated by the Roman numeral III in parentheses after the name chromium. The compound also contains carbonate ions, which consist of one carbon atom bonded to three oxygen atoms. Therefore, the correct name for this compound is chromium (III) carbonate.Rate this question:
- 28.
Multiple Choice: What is the correct chemical formula of the compound barium acetate?
- A.
BaC2H3O2
- B.
Ba(C2H3O2)2
- C.
Ba2C2H3O2
- D.
Ba2(C2H3O2)2
Correct Answer
B. Ba(C2H3O2)2Explanation
Barium acetate is a compound composed of barium ions (Ba2+) and acetate ions (C2H3O2-). The correct chemical formula for barium acetate is Ba(C2H3O2)2, which indicates that there are two acetate ions for every barium ion.Rate this question:
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- 29.
Multiple Choice: What is the correct chemical formula of the compound calcium sulfide?
- A.
CaS2
- B.
Ca2S
- C.
Ca2S2
- D.
CaS
Correct Answer
D. CaSExplanation
Calcium sulfide is represented by the chemical formula CaS. In this compound, calcium (Ca) has a charge of +2 and sulfur (S) has a charge of -2. To balance the charges, one calcium ion combines with one sulfur ion, resulting in the formula CaS.Rate this question:
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- 30.
Multiple Choice: What is the correct chemical formula of the compound potassium permanganate?
- A.
KMnO4
- B.
K2MnO4
- C.
KMnO3
- D.
K2MnO3
Correct Answer
A. KMnO4Explanation
The correct chemical formula of the compound potassium permanganate is KMnO4.Rate this question:
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- 31.
Multiple Choice: What is the correct chemical formula of the compound hydrogen peroxide?
- A.
HO2
- B.
H2O
- C.
H2O2
- D.
HO
Correct Answer
C. H2O2Explanation
Hydrogen peroxide is a compound that consists of two hydrogen atoms bonded to two oxygen atoms. The correct chemical formula for hydrogen peroxide is H2O2, as it accurately represents the composition of the compound.Rate this question:
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- 32.
Multiple Choice: What is the correct chemical formula of the compound sodium iodide?
- A.
NaI
- B.
NaIO2
- C.
NaIO3
- D.
NaIO4
Correct Answer
A. NaIExplanation
The correct chemical formula for sodium iodide is NaI. Sodium iodide is a compound composed of one sodium atom (Na) and one iodine atom (I). It is commonly used in medicine and as a reagent in chemical reactions.Rate this question:
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- 33.
Multiple Choice: What is the correct chemical formula of the compound silicon tetrahydride?
- A.
Si4H4
- B.
Si4H
- C.
SiH4
- D.
SiH
Correct Answer
C. SiH4Explanation
Silicon tetrahydride is a compound that consists of one silicon atom bonded to four hydrogen atoms. The correct chemical formula for silicon tetrahydride is SiH4.Rate this question:
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- 34.
Multiple Choice: What is the correct chemical formula of the compound carbon dioxide?
- A.
C2O2
- B.
C2O
- C.
CO2
- D.
CO
Correct Answer
C. CO2Explanation
Carbon dioxide is a compound made up of one carbon atom bonded to two oxygen atoms. The correct chemical formula for carbon dioxide is CO2.Rate this question:
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- 35.
Identification: What is the correct chemical formula of the compound magnesium borate?
Correct Answer
Mg3(BO3)2
Mg3 (BO3)2Explanation
The correct chemical formula for magnesium borate is Mg3(BO3)2. The formula indicates that there are three magnesium atoms (Mg) and two borate groups (BO3) in the compound. The parentheses indicate that the borate group consists of one boron atom (B) and three oxygen atoms (O). The subscript numbers indicate the number of each element present in the compound.Rate this question:
- 36.
Identification: What is the correct chemical formula of the compound strontium dichromate?
Correct Answer
SrCr2O7Explanation
Strontium dichromate is a compound composed of strontium (Sr), chromium (Cr), and oxygen (O). The correct chemical formula for strontium dichromate is SrCr2O7, which indicates that there are two chromium atoms (Cr) and seven oxygen atoms (O) for every strontium atom (Sr) in the compound.Rate this question:
- 37.
Identification: What is the correct chemical formula of the compound potassium iodide?
Correct Answer
KIExplanation
Potassium iodide is a compound composed of one potassium ion (K+) and one iodide ion (I-), resulting in the chemical formula KI. The symbol K represents the element potassium, while the symbol I represents the element iodine. The combination of these two elements forms the compound potassium iodide.Rate this question:
- 38.
What is the name for CuCl?
- A.
Copper Chloride
- B.
Copper Monochloride
- C.
Copper (I) Chloride
Correct Answer
C. Copper (I) ChlorideExplanation
CuCl is commonly known as Copper (I) Chloride. In this compound, copper has a +1 oxidation state, hence the Roman numeral I in the name. Chloride refers to the chlorine ion. Therefore, Copper (I) Chloride is the correct name for CuCl.Rate this question:
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- 39.
What is the formula for Iron (II) Nitride?
- A.
Fe3N2
- B.
Fe2N
- C.
FeN
Correct Answer
A. Fe3N2Explanation
The correct formula for Iron (II) Nitride is Fe3N2. This is because iron has a +2 charge and nitrogen has a -3 charge. To balance the charges, we need three iron ions (Fe2+) and two nitride ions (N3-), resulting in the formula Fe3N2.Rate this question:
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- 40.
+ Media + Media + Media + Media + Media + Add New Option + Explanation Cancel Determine the molecular shape and polarity
- A.
The molecular shape is bent
- B.
The molecular shape is linear
- C.
The molecular shape is trigonal planar
- D.
The molecule is polar
- E.
The molecule is non-polar
Correct Answer(s)
C. The molecular shape is trigonal planar
E. The molecule is non-polarExplanation
The molecular shape is determined by the arrangement of atoms and lone pairs around the central atom. In this case, the given options suggest that the molecular shape can be bent, linear, or trigonal planar. However, the correct answer states that the molecular shape is trigonal planar. Additionally, the correct answer states that the molecule is non-polar, which means that the distribution of charges in the molecule is symmetrical and there is no overall dipole moment.Rate this question:
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- 41.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is trigonal pyramidal with an angle of 107 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is bent with an angle of 120
- E.
The bonds are polar
- F.
The bonds are non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
B. The molecular shape is trigonal pyramidal with an angle of 107 between bonds
E. The bonds are polar
H. The molecule is non-symetrical
I. The molecule is polarExplanation
The given answer states that the molecular shape is trigonal pyramidal with an angle of 107 between bonds. This means that the central atom is bonded to three other atoms and has one lone pair, resulting in a pyramid-like shape. The answer also states that the bonds are polar, indicating that there is an unequal distribution of electron density between the bonded atoms. Additionally, the answer states that the molecule is non-symmetrical, meaning that it does not possess a plane of symmetry. Finally, the answer states that the molecule is polar, indicating that it has a net dipole moment due to the unequal distribution of charge.Rate this question:
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- 42.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is linear with an angle of 180 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is tetrahedral with an angle of 109.5
- E.
The bond between Be and H is polar
- F.
The bonds between Be and H is non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
B. The molecular shape is linear with an angle of 180 between bonds
E. The bond between Be and H is polar
G. The molecule is symetrical
J. The molecule is non-polarExplanation
The correct answer is the molecular shape is linear with an angle of 180 between bonds. This is because the molecule consists of two atoms, Be and H, which are bonded in a straight line. The bond between Be and H is polar because Be is more electronegative than H, causing a partial positive charge on H and a partial negative charge on Be. The molecule is symmetrical because there are no lone pairs of electrons or any other atoms attached to the central atom, resulting in no molecular dipole. Therefore, the molecule is non-polar.Rate this question:
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- 43.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is trigonal pyramidal with an angle of 107 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is tetrahedral with an angle of 109.5
- E.
The bond between C and H is polar
- F.
The bonds between C and O is polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
C. The molecular shape is trigonal planar with an angle of 120
F. The bonds between C and O is polar
H. The molecule is non-symetrical
I. The molecule is polarExplanation
The given answer states that the molecular shape is trigonal planar with an angle of 120, which means that the molecule has three atoms bonded to the central atom in a flat, triangular arrangement. The answer also states that the bonds between carbon (C) and oxygen (O) are polar, indicating that there is an uneven distribution of electron density in the bond. Additionally, it states that the molecule is non-symmetrical, meaning that it does not have a plane of symmetry. Finally, it states that the molecule is polar, indicating that there is an overall dipole moment in the molecule due to the presence of polar bonds and the molecule's non-symmetrical shape.Rate this question:
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- 44.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is trigonal pyramidal with an angle of 107 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is tetrahedral with an angle of 109.5
- E.
The bond between C and O is polar
- F.
The bonds between C and O is polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
B. The molecular shape is trigonal pyramidal with an angle of 107 between bonds
F. The bonds between C and O is polar
H. The molecule is non-symetrical
I. The molecule is polarExplanation
The molecular shape is trigonal pyramidal with an angle of 107 between bonds because the molecule has three bonded atoms and one lone pair, resulting in a pyramidal shape. The bonds between C and O are polar because there is a difference in electronegativity between carbon and oxygen, causing an unequal sharing of electrons. The molecule is non-symmetrical because it has a lone pair, which creates an asymmetrical distribution of electron density. As a result, the molecule is polar because the polar bonds do not cancel each other out.Rate this question:
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- 45.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is linear with an angle of 180 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is tetrahedral with an angle of 109.5
- E.
The bond between C and H is polar
- F.
The bonds between C and H is non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
D. The molecular shape is tetrahedral with an angle of 109.5
F. The bonds between C and H is non-polar
G. The molecule is symetrical
J. The molecule is non-polarExplanation
The given answer states that the molecular shape is tetrahedral with an angle of 109.5 degrees, which means that the molecule has four bonded atoms and no lone pairs of electrons. It also states that the bonds between carbon (C) and hydrogen (H) are non-polar, indicating that the electronegativity difference between C and H is negligible. Furthermore, it states that the molecule is symmetrical, meaning that it has a balanced distribution of atoms and electron density. Finally, it states that the molecule is non-polar, suggesting that the overall dipole moment of the molecule is zero.Rate this question:
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- 46.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is linear with an angle of 180 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is bent with an angle of 120
- E.
The bonds are polar
- F.
The bonds are non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
C. The molecular shape is trigonal planar with an angle of 120
E. The bonds are polar
G. The molecule is symetrical
J. The molecule is non-polarExplanation
The correct answer is the molecular shape is trigonal planar with an angle of 120, the bonds are polar, the molecule is symmetrical, and the molecule is non-polar.
Trigonal planar shape refers to a molecule with three bonding pairs and no lone pairs of electrons around the central atom, resulting in a flat, triangular shape. The bond angle in a trigonal planar molecule is 120 degrees. The bonds being polar means that there is an unequal distribution of electron density, resulting in a slight positive and negative charge on different ends of the bond. However, since the molecule is symmetrical, the individual bond polarities cancel out, making the overall molecule non-polar.Rate this question:
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- 47.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is trigonal pyramidal with an angle of 107 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is tetrahedral with an angle of 109.5
- E.
The bonds are polar
- F.
The bonds are non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
D. The molecular shape is tetrahedral with an angle of 109.5
E. The bonds are polar
G. The molecule is symetrical
J. The molecule is non-polarExplanation
The correct answer is the molecular shape is tetrahedral with an angle of 109.5, the bonds are polar, the molecule is symmetrical, and the molecule is non-polar. The molecular shape of a tetrahedral molecule has four bonded atoms arranged symmetrically around a central atom. The bond angle in a tetrahedral molecule is 109.5 degrees. The bonds are polar because there is a difference in electronegativity between the atoms involved in the bond. However, since the molecule is symmetrical, the polar bonds cancel each other out, resulting in a non-polar molecule.Rate this question:
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- 48.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is trigonal pyramidal with an angle of 107 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is tetrahedral with an angle of 109.5
- E.
The bond between C and H is polar
- F.
The bonds between C and cl is polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
D. The molecular shape is tetrahedral with an angle of 109.5
F. The bonds between C and cl is polar
H. The molecule is non-symetrical
I. The molecule is polarExplanation
The given correct answer states that the molecular shape is tetrahedral with an angle of 109.5 degrees. This means that the molecule has four bonded atoms surrounding the central atom, arranged in a three-dimensional shape resembling a pyramid with a triangular base. The answer also states that the bond between carbon (C) and chlorine (Cl) is polar, indicating an unequal sharing of electrons between the atoms. Furthermore, it states that the molecule is non-symmetrical, meaning that it does not possess a plane of symmetry. Lastly, it states that the molecule is polar, indicating that it has a net dipole moment due to the presence of polar bonds and an asymmetrical shape.Rate this question:
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- 49.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is linear with an angle of 180 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is bent with an angle of 120
- E.
The bonds are polar
- F.
The bonds are non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
B. The molecular shape is linear with an angle of 180 between bonds
E. The bonds are polar
G. The molecule is symetrical
J. The molecule is non-polarExplanation
The given answer states that the molecular shape is linear with an angle of 180 between bonds. This means that the molecule has a straight, linear structure with a bond angle of 180 degrees. The answer also states that the bonds are polar, indicating that there is an uneven distribution of electron density between the atoms involved in the bond. Additionally, the answer states that the molecule is symmetrical, meaning that it has a balanced arrangement of atoms and can be divided into two equal halves. Finally, the answer states that the molecule is non-polar, suggesting that the overall molecular polarity is canceled out due to the symmetrical arrangement of atoms and the polar bonds.Rate this question:
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- 50.
Determine the molecular shape, bond angle, bond polarity, symetry and polarity of this molecule, check the correct options:
- A.
The molecular shape is bent, with an angle of 105 between bonds
- B.
The molecular shape is linear with an angle of 180 between bonds
- C.
The molecular shape is trigonal planar with an angle of 120
- D.
The molecular shape is bent with an angle of 120
- E.
The bonds are polar
- F.
The bonds are non-polar
- G.
The molecule is symetrical
- H.
The molecule is non-symetrical
- I.
The molecule is polar
- J.
The molecule is non-polar
Correct Answer(s)
A. The molecular shape is bent, with an angle of 105 between bonds
E. The bonds are polar
H. The molecule is non-symetrical
I. The molecule is polarExplanation
The given answer states that the molecular shape is bent, with an angle of 105 between bonds. This means that the molecule has a bent or V-shaped structure, with a bond angle slightly less than the ideal 109.5 degrees for a tetrahedral arrangement.
The answer also mentions that the bonds are polar. This implies that there is an uneven distribution of electron density in the molecule, resulting in a separation of positive and negative charges.
Additionally, the answer states that the molecule is non-symmetrical, indicating that the molecule does not possess a plane of symmetry.
Lastly, the answer states that the molecule is polar. This means that the molecule has a net dipole moment due to the uneven distribution of charge.
In summary, the given answer provides the correct options for the molecular shape, bond polarity, symmetry, and polarity of the molecule.Rate this question:
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Current Version
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Sep 04, 2023Quiz Edited by
ProProfs Editorial Team -
Oct 21, 2013Quiz Created by
Kirkwoodl
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