Lesson 2A.2
2A.2 Covalent bonding and molecular shapes Quiz: Pearson Edexcel Chemistry, Unit 2
20 questions
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Lesson 2A.2, Covalent bonding and molecular shapes: 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 defines a covalent bond between two atoms?
- Electrostatic repulsion
- Delocalised sea
- Shared electron pair
- Transferred electrons
-
What is the shape of a methane molecule, CH4?
- Linear
- Octahedral
- Trigonal planar
- Tetrahedral
-
What is the approximate bond angle in a water molecule?
- 109.5 degrees
- 104.5 degrees
- 180 degrees
- 120 degrees
-
What is the shape of an ammonia molecule, NH3?
- Trigonal planar
- Tetrahedral
- V-shaped
- Trigonal pyramidal
-
What is the shape of a carbon dioxide molecule, CO2?
- Bent
- Tetrahedral
- Pyramidal
- Linear
-
What is the shape of a boron trichloride molecule, BCl3?
- T-shaped
- Pyramidal
- Trigonal planar
- Tetrahedral
-
What type of bond forms the fourth N-H bond in the ammonium ion?
- Hydrogen bond
- Metallic bond
- Dative covalent bond
- Ionic bond
-
Which type of covalent bond is generally the shortest?
- Double bond
- Ionic bond
- Triple bond
- Single bond
-
Which electron-pair repulsion is the strongest in valence shell electron pair repulsion theory?
- Lone pair-lone pair
- Bonding pair-bonding pair
- Lone pair-bonding pair
- Triple bond-single bond
-
What is the molecular shape of a phosphorus pentachloride molecule?
- Pyramidal
- Trigonal bipyramidal
- Trigonal planar
- Square planar
-
What is the shape of a sulfur hexafluoride molecule?
- Octahedral
- Hexagonal
- Square pyramidal
- Trigonal bipyramidal
-
How many lone pairs are on the central oxygen atom of a water molecule?
- 1
- 2
- 4
- 0
-
Predict the bond angle in BeCl2.
- 109.5 degrees
- 180 degrees
- 90 degrees
- 120 degrees
-
Why is the bond angle in water smaller than in methane?
- Higher electronegativity
- Fewer bonding pairs
- Larger atomic radius
- Extra lone-pair repulsion
-
How many shared electron pairs are in a triple covalent bond, as in N2?
- 3
- 6
- 1
- 2
-
In Al2Cl6, how many dative (coordinate) bonds are there?
- 1
- 4
- 6
- 2
-
How many electron pairs surround the central sulfur atom in SF6?
- 4
- 5
- 8
- 6
-
Which molecule has ideal bond angles of 120 degrees?
- CH4
- BCl3
- H2O
- NH3
-
What is the bond angle in the ammonium ion?
- 104.5 degrees
- 90 degrees
- 120 degrees
- 109.5 degrees
-
What is the axial bond angle in a trigonal bipyramidal molecule?
- 120 degrees
- 180 degrees
- 90 degrees
- 109.5 degrees
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