PHS Edexcel Combined Science Foundation: Chemistry Paper 1 (November Mock)

Use this information to give the number of protons in this atom of lithium.

• 3

• 7

• 4

Use this information to give the number of neutrons in this atom of lithium.

• 3

• 7

• 4

What is the electronic configuration of this atom of potassium?

• 1.8.8.2

• 18.1

• 19

• 2.8.8.1

What is a covalent bond?

• Strong electrostatic attraction between oppositely charged ions.

• The bond formed when a pair of electrons is shared between two atoms.

• The bond formed when two pairs of electrons are shared between the same two atoms.

• The type of bonding found in metals. We can think of it as positively charged ions in a 'sea' of negatively charged electrons.

Which separation technique would you use to separate kerosene from crude oil?

• simple distillation

• fractional distillation

• filtration

• crystallisation

Which of the following is the process occurring when a gas changes to a liquid?

• condensing

• evaporating

• freezing

• melting

The apparatus shown in Figure 4 can be used to separate water from a solution of ink. State the temperature reading on the thermometer when pure water is collecting in the beaker.

• 0°C

• 85°C

• 100°C

• 105°C

What is the equation to calculate the Rf value of a chromatography spot.

• distance travelled by solvent/distance travelled by substance

• distance travelled by substance/distance travelled by solvent

• distance travelled by solvent - distance travelled by substance

• distance travelled by solvent x distance travelled by substance

Unreactive metals are found in the Earth’s crust as uncombined elements. Which of the following metals are found uncombined in the Earth’s crust?

• magnesium

• silver

• zinc

• gold

When iron oxide is heated with carbon, iron is produced.

iron oxide + carbon → iron + carbon dioxide

What happens to the carbon in this reaction?

• the carbon is separated

• the carbon is neutralised

• the carbon is oxidised

• the carbon is reduced