How many pi bonds does a molecule of ethene, C2H4 contain?
0
1
2
3
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Syllabus Edition
First teaching 2023
First exams 2025
How many pi bonds does a molecule of ethene, C2H4 contain?
0
1
2
3
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Which type of bond results from the side-to-side overlap of p orbitals?
Sigma (σ) bond
Pi (π) bond
Covalent bond
Ionic bond
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How many sigma and pi bonds are present in a double bond?
sigma bonds | pi bonds | |
A | 2 | 0 |
B | 1 | 1 |
C | 0 | 2 |
D | 1 | 2 |
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What is the hybridisation of the carbon atom in methane, CH4?
sp
sp2
sp3
sp3d
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Which of the following molecules is a straight-chain hydrocarbon?
Benzene
Cyclopentane
2-methylpropane
Propane
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Methyl isocyanate, CH3NCO, is a toxic liquid which is used in the production of adhesives.
The sequence of atoms in a methyl isocyanate molecule is H3C—N=C=O.
What is the approximate angle between the bonds formed by the N atom?
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A synthetic molecule called N-acetylcysteine is used as an antidote for patients who have ingested too many paracetamol tablets.
The diagram shows part of the molecule N-acetylcysteine and bond angles have been labelled.
Which is the correct size order of bond angles x, y, z from smallest to largest?
x y z
y z x
z y x
z x y
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A student is building a non-cyclic, chiral alkane from a molymod kit. What is the lowest number of carbon atoms they will need to include in the model?
6
11
9
7
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Methacrylate acrylonitrile is an organic molecule that contains carbons that are sp, sp2, and sp3 hybridised.
What is the most likely bond angle for carbon that is sp2 hybridised?
105
109
120
180
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The amino acid cysteine performs structural and functional roles within proteins. It is used as a nucleophile in enzymatic reactions and can form disulfide bonds with other cysteine molecules.
How many carbon molecules in cysteine are sp2 hybridised?
3
2
1
0
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Limonene is found in the peel of citrus fruits.
How many σ and π bonds are present in this molecule?
σ |
π |
|
A |
24 |
4 |
B |
12 |
2 |
C |
26 |
2 |
D |
22 |
4 |
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