Chemistry Test

Question 1

Meth

Answer 1

1

Question 2

Eth

Answer 2

2

Question 3

Prop

Answer 3

3

Question 4

But

Answer 4

4

Question 5

Pent

Answer 5

5

Question 6

Hex

Answer 6

6

Question 7

Hept

Answer 7

7

Question 8

Oct

Answer 8

8

Question 9

Non

Answer 9

9

Question 10

Dec

Answer 10

10

Question 11

What does baking powder contain?

Answer 11

Sodium hydrogencarbonate

Question 12

Baking powder is used for baking cakes. It contains sodium hydrogencarbonate which brakes down when heated to form carbon dioxide gas. What is the word and symbol equation for this reaction?

Answer 12

Sodium hydrogencarbonate————> sodium carbonate+ carbon dioxide + water
Heat

2NaHCO3——-> Na2CO3+ CO2+H2O
Heat

Question 13

( Emulsifiers are molecules that have two different ends: Hydrophilic end

Answer 13

Water loving-that firm chemical bonds with water but not with oils

Question 14

A hydrophobic end

Answer 14

water hating-that forms chemical bonds with oils but not with water

Question 15

Lecithin (an commonly emulsifier…)

Answer 15

Commonly used in food

Question 16

How are esters made?

Answer 16

They are made by reacting alcohol with organic acid

Question 17

What are esters?

Answer 17

Esters are chemicals with pleasant smells. They occur naturally but can be made in laboratory

Question 18

What are solvents?

Answer 18

A solvent is a liquid that dissolves substances

Question 19

Crude oil

Answer 19

Is a mixture of hydrocarbons

Question 20

Destillation

Answer 20

A process that can be used to separate a pure liquid from a mixture of liquids. It works when the different liquids have different boiling points.

Question 21

What are hydrocarbons

Answer 21

Are compounds made from carbon and hydrogen atoms joined by colvalent bonds

Question 22

Saturated?

Answer 22

They have only single bonds t.e.x alkanes

Question 23

Unsaturated?

Answer 23

Have a double bonds t.e.x alkenes