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Alkenes and Polymers

Description

Quiz on Alkenes for A-Level Chemistry. Scores are NOT dependent on how many correct answers there are!
Eleanor H
Quiz by Eleanor H, updated more than 1 year ago
Eleanor H
Created by Eleanor H almost 8 years ago
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Resource summary

Question 1

Question
Alkenes are [blank_start]planar[blank_end] with a bond angle of [blank_start]120[blank_end] degrees.
Image:
6210b2f1-44f5-44c5-a261-2b942867e35b (image/jpeg)
Answer
  • planar
  • tetrahedral
  • trigonal planar
  • bent
  • 120
  • 109.5
  • 107
  • 104.5

Question 2

Question
Alkenes can't rotate around the double bond.
Image:
045a110a-114d-4506-ba74-daec876e6488.gif (image/gif)
Answer
  • True
  • False

Question 3

Question
Diastereoisomers are mirror images of each other.
Answer
  • True
  • False

Question 4

Question
Electrophiles like [blank_start]electrons[blank_end] and therefore have a partial or formal [blank_start]positive[blank_end] charge. Nucleophiles like [blank_start]nuclei or protons[blank_end] and therefore have a partial or formal [blank_start]negative[blank_end] charge.
Answer
  • electrons
  • nuclei or protons
  • positive
  • negative

Question 5

Question
Alkenes have a high electron density in the C=C bond which means that they are attacked by nucleophiles.
Answer
  • True
  • False

Question 6

Question
The Electrophilic Addition of Hydrogen Bromide to an Alkene forms:
Answer
  • a Bromoalkane
  • Bromine
  • Hydrogen gas
  • an Alkane

Question 7

Question
How can Bromine act as an Electrophile?
Image:
7ded67e7-da39-4ce5-89d2-80fca18065e1 (image/jpeg)
Answer
  • When the electron density of the C=C bond causes an induced dipole
  • When it is in a radioactive form
  • When it is concentrated
  • When it is heated to a high temperature (1000C)

Question 8

Question
The Electrophilic Addition of Bromine to an Alkene forms:
Answer
  • a Dibromoalkane
  • a Bromoalkane
  • Hydrogen Bromide
  • an Alkane

Question 9

Question
The test for Unsaturated Hydrocarbons involves adding Bromine Water. The presence of Unsaturated Hydrocarbons would be indicated by:
Answer
  • the decolourisation of the Bromine Water
  • fizzing
  • the presence of a cream-coloured precipitate
  • a bad smell

Question 10

Question
Why must the temperature be 0C when adding Ethene to concentrated Sulfuric Acid?
Answer
  • the reaction is very exothermic
  • the melting point of Sulfuric Acid is very low
  • the boiling point of Ethene is very low

Question 11

Question
What is formed when Ethene is reacted with concentrated 85% Sulfuric Acid?
Answer
  • Ethyl Hydrogensulfate
  • Ethanoic Acid
  • Water
  • Hydrogen Sulfide

Question 12

Question
Industrially, what would be added to the product formed from the Electrophilic Addition of Sulfuric Acid to Ethene to form Ethanol?
Answer
  • Phosphoric Acid
  • Water
  • Methanoic Acid
  • Nothing - the original product is Ethanol

Question 13

Question
Markovnikov's Rule states that the Major Product formed in Electrophilic Addition with an Unsymmetrical Alkene has the more stable Carbocation intermediate.
Answer
  • True
  • False

Question 14

Question
Which of these Carbocations is the most stable?
Answer
  • Primary
  • Secondary
  • Methyl
  • Tertiary

Question 15

Question
Label the diagram of a C=C bond.
Image:
653ce290-4b19-4cd7-a782-602e1e41a2fa (image/png)
Answer
  • π (pi)
  • covalent
  • dative
  • σ (sigma)
  • ionic
  • metallic

Question 16

Question
Addition Polymers are formed from [blank_start]Alkenes[blank_end] under [blank_start]high[blank_end] pressure and with a suitable catalyst. The [blank_start]π[blank_end] bond breaks to allow the molecules to join together.
Answer
  • Alkenes
  • Cycloalkanes
  • Alkanes
  • high
  • low
  • π (pi)
  • σ (sigma)

Question 17

Question
The best yields of Additional Polymerisation are obtained at a low temperature.
Answer
  • True
  • False

Question 18

Question
In Addition Polymerisation, there is a reduction in the number of moles.
Answer
  • True
  • False

Question 19

Question
What is the positive effect of Incineration of Polymers?
Answer
  • There is a large amount of useful heat energy released
  • It gets rid of them
  • There is no positive effect
  • There is a large amount of useful water released

Question 20

Question
What are the negative effects of Incineration of Polymers?
Answer
  • Greenhouse Gases are produced
  • Toxic Gases can be produced
  • It's not cost effective
  • There are no negative effects

Question 21

Question
What are the negative effects of Recycling Polymers?
Answer
  • There are no negative effects
  • It's expensive to separate out the different polymers
  • It's hard to separate out the different polymers
  • It requires heat provided by the combustion of Fossil Fuels

Question 22

Question
What are the positive effects of Recycling Polymers?
Answer
  • It reduces Crude Oil use
  • It reduces disposal problems
  • There are no positive effects
  • It purifies the polymers

Question 23

Question
Select all the correct properties of Polymers:
Answer
  • Unsaturated
  • Polar
  • High Melting/Boiling Point
  • Unreactive
  • Short Lifetime
  • Non-Biodegradable

Question 24

Question
Straight-Chain Polymers or those with fewer branches are [blank_start]more[blank_end] compact and pack with a [blank_start]high[blank_end] density. This means they have more Van der Waal's forces so they are [blank_start]stronger[blank_end] and [blank_start]harder[blank_end]. Polymers with more branches are [blank_start]less[blank_end] compact and pack with a [blank_start]low[blank_end] density. This means they have less Van der Waal's forces so they are [blank_start]weaker[blank_end] and [blank_start]softer[blank_end].
Answer
  • more
  • high
  • stronger
  • harder
  • less
  • low
  • weaker
  • softer

Question 25

Question
Polyvinylchloride is long-lasting, durable and versatile.
Answer
  • True
  • False

Question 26

Question
This question is about the most common Plasticisers of polyvinylchloride, which are phthalates. What have phthalates been linked to which makes some people ask for the banning of them?
Answer
  • Cancer
  • Global Warming
  • Cardiovascular Disease
  • Multiple Sclerosis

Question 27

Question
What effect to Plasticisers have on a polymer and why?
Answer
  • They make them softer and more flexible. Plasticisers weaken the intermolecular forces between the chains.
  • They make them harder and less flexible. Plasticisers strengthen the intermolecular forces between the chains.

Question 28

Question
Which of these species show E-Isomerism?
Answer

Question 29

Question
Use the Cahn-Ingold-Prelog Rules to put these elements in order. Some have already been filled in for you. [blank_start]Iodine[blank_end] > Bromine > [blank_start]Chlorine[blank_end] > [blank_start]Fluorine[blank_end] > [blank_start]Carbon[blank_end] > [blank_start]Hydrogen[blank_end]
Answer
  • Iodine
  • Chlorine
  • Hydrogen
  • Carbon
  • Fluorine

Question 30

Question
In E/Z-Isomerism of an ALKENE with no halogens, based on the Cahn-Ingold-Prelog Rules, the highest priority group is that which contains more Carbon.
Image:
cbae6990-8e5c-43f9-a414-7565c78a3fda (image/png)
Answer
  • True
  • False
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