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Flashcards in C1D - Polymers Deck (19):
0

What are the two elements chemically combined in a hydrocarbon ?

ONLY hydrogen and carbon

1

What is made in a polymerisation reaction ?

Polymers

2

How does polymerisation work ?

Small molecules called monomers join together to form large molecules called polymers

3

Ethene is an alkene which has just taken part in a polymerisation reaction. What would we call it now ?

Polyethene

4

Draw the displayed formula of propene when it transforms into polypropene

5

What are addition polymers made from ?

Unsaturated monomers

6

How is something an unsaturated compound ?

It has a double bond

7

Explain in terms of bonds how polymers are formed ?

Unsaturated monomer molecules (alkenes) can open up their double bonds and join together forming long polymer chains

8

Alkenes have double bonds. True or false ?

True

9

John says that alkenes are saturated but Julie also says alkanes are saturated ? Who is right and why ?

Julie is right. Alkanes are saturated because they have single bonds but John is wrong as alkenes have double bonds making them unsaturated

10

Bromine water tests for what ?

Unsaturation ( double bonds )

11

How will we know if an unsaturated compound is present ?

If bromine water turns from Orange to colourless

12

How does bromine water work ?

It breaks the double bonds and bonds instead with the alkene forming s dibromoalkane therefore changing its colour

13

Why won't alkanes form polymers ?

No double bonds to open up

14

What hold atoms in a molecule together ?

Covalent bonds

15

When are covalent bonds formed ?

When atoms share electrons

16

What does the sharing of electrons done ?

Allow both atoms to have a full outer shell

17

Methane. Butane. Propene. Ethane. What's the odd one out. Why ?

Propene. It's an alkene. The rest are alkanes.

18

How do atoms form double bonds ?

Two atoms will share two pairs of electrons