Lesson 2A.3
2A.3 Electronegativity and bond polarity Quiz: Pearson Edexcel Chemistry, Unit 2
20 questions
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Lesson 2A.3, Electronegativity and bond polarity: 20 multiple choice questions for the Pearson Edexcel Chemistry (9CH0), Unit 2: Bonding and Structure, written with Revision Ninja.
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The 20 questions
-
What term describes an atom's ability to attract shared electrons?
- Electronegativity
- Electron affinity
- Polarisability
- Ionisation energy
-
Which element is the most electronegative?
- Nitrogen
- Oxygen
- Chlorine
- Fluorine
-
Which bond is most polar?
- H-I
- H-F
- H-Cl
- H-Br
-
Which of these diatomic molecules has a non-polar covalent bond?
- Cl2
- CO
- HF
- HCl
-
Which pair of atoms has the largest electronegativity difference?
- N and H
- H and Cl
- C and O
- Na and F
-
Why is carbon dioxide a non-polar molecule overall?
- It is asymmetrical
- Dipoles cancel out
- It has no electrons
- Bonds are non-polar
-
Which of these molecules is polar?
- CCl4
- CO2
- CHCl3
- BF3
-
Which atom gains a partial negative charge in a carbon-chlorine bond?
- Carbon
- Chlorine
- Sodium
- Hydrogen
-
Which carbon-halogen bond is most polar?
- C-I
- C-Br
- C-Cl
- C-F
-
Why is chloromethane polar while tetrachloromethane is non-polar?
- Different carbon isotopes
- Different bond lengths
- Ionic character differences
- Asymmetric dipole cancellation
-
What happens when polar bonds are arranged symmetrically in a molecule?
- Molecule becomes ionic
- Strong hydrogen bonding
- Molecule becomes unstable
- Dipoles cancel out
-
What defines a polar covalent bond?
- Electrostatic attraction
- Unequal electron sharing
- Equal electron sharing
- Complete electron transfer
-
Which molecule has the most polar bonds: H2O, H2S or H2Se?
- H2S
- H2O
- H2Se
- H2Te
-
Which molecule is non-polar, despite having polar bonds?
- CS2
- CO
- NH3
- SO2
-
What is the overall polarity of a boron trifluoride molecule?
- Non-polar
- Ionic
- Radical
- Polar
-
How does electronegativity change across Period 2 from lithium to fluorine?
- Stays constant
- Increases then decreases
- Decreases
- Increases
-
Which type of bond is present in a chlorine molecule?
- Hydrogen bond
- Ionic bond
- Polar covalent
- Non-polar covalent
-
What type of bond has an electronegativity difference of 1.7?
- Polar covalent
- Pure ionic
- Metallic
- Pure covalent
-
Which of these bonds has the smallest electronegativity difference?
- O-H
- N-H
- C-H
- F-H
-
Which element in Group 6 is the most electronegative?
- Sulfur
- Oxygen
- Tellurium
- Selenium
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