June 2022 mistake

Question 1

Differences between physical properties of the element Group 1 and transition elements

Answer 1

Transition metals have
- higher melting points/boiling points
- higher density
-stronger
-harder

Question 2

Transition metals form?

Answer 2

-Form coloured compounds
-Form ions with different charges

Question 3

Describe how metals conduct electricity (3)

Answer 3

Delocalised electrons
Electrons carry an electrical charge
Through the structure

Question 4

Describe the structure and bonding of diamond?(3)

Answer 4

Giant structure/macromolecule
Covalent bonds
Four bonds per carbon atom

Question 5

Suggest one reason why the products of the electrolysis must be kept apart

Answer 5

So the products do not react to reform (e.g sodium chloride)

Question 6

Explain how the alkaline solution is produced
Process at electrodes
(electrolysis of sodium chloride)

Answer 6

Sodium and hydroxide ions are left in the solution
Because hydrogen ions are discharged at the negative electrode to form hydrogen
And chloride ions are proceed at the positive electrode to form chlorine

Question 8

Which two ions are present in aqueous sodium chloride solution during electrolysis?

Answer 8

OH- ions and H+ ions