C3- Carbon chemistry

Question 1

Mixture

Answer 1

Two elements or compounds that arnt chemically bonded

Question 2

Electrophile

Answer 2

Electron pair acceptor

Question 3

Nucleophile

Answer 3

Electron pair donor

Question 4

Low density Polythene

Answer 4

soft
flexible
plastic bags
squeeze bottles
high pressure and temp

Question 5

Polypropene

Answer 5

Tough
strong
bottle crates
rope
low temp and pressure

Question 6

PVC

Answer 6

strong and durable

rigid or stretchy

Question 7

Polystyrene

Answer 7

thermal insulator due to trapped air

Question 8

Memory foam

Answer 8

Polymer that gets softer as it gets warmer

Question 9

Partial combustion

Answer 9

Smoky yellow flame and less energy

carbon carbon monoxide carbon dioxide and water

Question 10

What to consider when burning fuel?

Answer 10

Ease of ignition
Energy value
Ash and smoke
Storage and transport

Question 11

First three alcohols

Answer 11

dissolve completely in water

react with sodium to give hydrogen and alkoxides

Question 12

Alcohols used as solvents

Answer 12

dissolve substances water can’t dissolve (hydrocarbons, oils and fats)
methylated spirits is ethanol with chemicals added for cleaning paint brushes and fuel

Question 13

Ethanol for fuel

Answer 13

Sugar canes

Question 14

Carboxylic acid + carbonate =

Answer 14

Salt (anoate) carbon dioxide and water

Question 15

What happens when a carboxylic acid dissolves in water

Answer 15

weak acidic solution

Question 16

How can ethanoic acid be made?

Answer 16

Oxidising ethanol (eg fermentation)
ethanol + oxygen = ethanoic acid + water

Question 17

Uses of carboxylic acids

Answer 17

Citric acids (fizzy drinks)
getting rid of scale
soaps and detergents
prep of esters
good solvents for organic molecules