2022 Paper 1

Question 1

Properties of noble gas

Answer 1

Dull
Low melting point
Does not conduct electricity (has no delocalised electrons)

Question 2

Properties of transition metals

Answer 2

Form ions with different charges

Question 3

Are group 1 metals more or less strong than transition

Answer 3

Less strong

Question 4

Name one other compound the student could add to hydrochloric add to produce zinc chloride

Answer 4

Zinc carbonate

Question 5

When talking about giant covalent structures like diamond, do you talk about intermolecular forces or strong covalent bonds

Answer 5

Strong covalent bonds

Question 6

Does the boiling point increase or decrease down the noble gasses

Answer 6

the noble gases have boiling points that increase going down the group

Question 7

Describe how sodium hydroxide ( amongst the other main productsis produced from the electrolysis of aqueous sodium chloride

Answer 7

Sodium ions and hydroxide ions are left in the solution. This is because hydrogen ions were reduced at the cathode and chloride ions oxidised at the anode

Question 8

Explain how the pH of a solution depends on the concentration and strength

Answer 8

PH depends on how long many H+ ions there are in a solution. High concentration of H+ ions = lower pH
Therefore, if an acid fully ionises in water to release H+ ions it will have a lower pH
If an acid is more concentrated, it will have more acid (/ solutes in a given volume. High concentration = lower pH

Question 9

Why can a neutral pH substance not conduct electricity ( eg titration with Sulfuric acid and barium hydroxide)

Answer 9

There are no ions that are free to move as barium sulfate is solid and hydrogen ions reacted with hydroxide ions to produce water