Unit 3 Written

Question 1

Answer 1

D.C (direct current)

Question 2

Answer 2

From magnesium to silver

Question 3

Answer 3

Question 4

Answer 4

Question 5

Answer 5

Question 6

Answer 6

A

Question 7

Answer 7

A

Question 8

Answer 8

Question 9

Answer 9

Question 10

Answer 10

Question 11

Name the piece of apparatus labelled X

Answer 11

Ion bridge

Question 12

Answer 12

electrolyte

Question 13

Answer 13

Question 14

Answer 14

Carbon (graphite)

Question 15

Answer 15

Question 16

Answer 16

It conducts electricity

Question 17

Answer 17

It is insoluble

Question 19

Answer 19

It would increase

Question 21

Answer 21

A

Question 22

Answer 22

A

metals always conduct electricity due to delocalised electrons

Question 23

Answer 23

F

Metals below H+ ions in the electrochemical series cannot displace H+ ions from solution

Question 24

Answer 24

A

Metals below H+ ions in the electrochemical series cannot displace H+ ions from solution

Question 25

Answer 25

B A C

Question 26

Answer 26

Electrons flow from metal higher in electrochemical series to one lower down

Question 27

Answer 27

A

Metals including Al and above can only be obtained from their ores by Electrolysis

Question 28

Answer 28

E

Hydrogen. Metals are oxidised (lose their electrons) to the H+ (aq) ions allowing them to form a covalent bond and come off as hydrogen gas

Question 29

Answer 29

A&D

Ionic solutions will conduct as the ions are free to move.

Metals always conduct due to their delocalised electrons

Question 30

Answer 30

B

(biggest difference between metals on echem series)

Answer 31

B

(biggest difference between metals on echem series)

Question 32

Answer 32

D

Metal X must be higher up and biggest difference is between Mg and Ag

Question 33

(LO 15)

Answer 33

Electrolyte

Question 34

Answer 34

Ion bridge

Question 35

Answer 35

D

Question 36

Answer 36

Iron

Question 37

Answer 37

ammonium nitrate

Question 38

Answer 38

Blue

Purple