Lesson 3.3.4.1
3.3.4.1 Structure, bonding and reactivity Quiz: AQA Chemistry, Unit 3
20 questions
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Lesson 3.3.4.1, Structure, bonding and reactivity: 20 multiple choice questions for the AQA Chemistry (7405), Unit 3: Organic chemistry, written with Revision Ninja.
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The 20 questions
-
What is the general formula of alkenes with one C=C double bond?
- CnH2n-2
- CnH2n+2
- CnH2n+1OH
- CnH2n
-
Which combination of covalent bonds makes up the carbon-carbon double bond in alkenes?
- One sigma, two pi
- One sigma, one pi
- Two pi bonds
- Two sigma bonds
-
Which feature gives an alkene C=C double bond an area of high electron density?
- Sigma bond axis
- Lone pair electrons
- Nucleus displacement
- Pi electron cloud
-
What is the bond angle around each carbon in a C=C double bond?
- About 109.5 degrees
- About 90 degrees
- About 120 degrees
- About 180 degrees
-
Which feature is present in all unsaturated alkenes?
- C=O double bond
- C-C single bond
- C-H single bond
- C=C double bond
-
Which compound is the simplest alkene?
- Propane
- Methane
- Ethene
- Ethane
-
Which reagent tests for unsaturation in an organic compound?
- Acidified potassium dichromate
- Silver nitrate solution
- Lime water
- Bromine water
-
What is the shape of the ethene molecule around each carbon?
- Linear
- Pyramidal
- Tetrahedral
- Trigonal planar
-
Which type of bond breaks first during reactions of alkenes?
- Sigma bond
- Dative bond
- Pi bond
- Hydrogen bond
-
Which molecule has a C=C double bond?
- Propane
- Methanol
- Ethanoic acid
- Propene
-
How does C=C bond strength compare to C-C bond strength?
- Stronger overall
- Identical strength
- Weaker overall
- Double the strength
-
Which of these compounds contains a C=C double bond with two different groups on each carbon?
- Ethanol
- Propane
- But-2-ene
- Ethene
-
How many sigma and pi bonds are present in ethene, C2H4?
- 6 sigma and 0 pi
- 3 sigma and 1 pi
- 4 sigma and 2 pi
- 5 sigma and 1 pi
-
What is the shape around each carbon atom in ethene?
- Pyramidal
- Linear
- Tetrahedral
- Trigonal planar
-
Why are alkenes widely used as industrial starting materials?
- Low solubility
- High volatility
- High flammability
- High reactivity
-
Where are pi bond electrons located relative to the carbon nuclei axis?
- Above and below
- Between the nuclei
- Around hydrogen atoms
- Inside carbon nuclei
-
What is the bond angle around each carbon atom in ethene?
- 180 degrees
- 90 degrees
- 120 degrees
- 109.5 degrees
-
What main reaction type do alkenes typically undergo?
- Condensation
- Addition
- Substitution
- Elimination
-
How does C=C bond length compare to C-C bond length?
- Longer
- Equal
- Shorter
- Variable
-
What creates the high electron density region in an alkene double bond?
- Pi electron cloud
- Carbon atomic nucleus
- Sigma electron pair
- Lone pair electrons
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