GCSE C1 (Higher) Attempt 1 - Richard Hinchliffe | Biblioteka

1

What is chromatography used for?

Separating large and small molecules.

Separating molecules by mass.

Separating liquids by boiling point.

1

Define an isotope.

Same number of protons and neutrons, different number of electrons.

Same number of electrons and neutrons, different number of protons.

Same number of protons and electrons, different number of neutrons.

1

Which describes fractional distillation as you move up the column?

Temperature lowers, viscosity increases, boiling point increases, flammability increases.

Temperature lowers, viscosity increases, boiling point lowers, flammability increases.

Temperature lowers, viscosity decreases, boiling point decreases, flammability increases.

1

What type of ion does an atom form when it gains electrons?

Positively charged ion.

Negatively charged ion.

Neutrally charged ion.

1

Why are atoms electronically neutral?

They have the same number of protons and electrons.

They have the same number of protons and neutrons.

They have the same number of electrons and neutrons.

1

Who discovered the atom was mostly empty space and how?

Rutherford using the plum pudding model.

Rutherford using the gold foil experiment in 1920.

Rutherford using the gold foil experiment in 1909.

1

What type of ion does an element in Group 3 form?

3+

5-

3-

1

What techniques can be used to separate rock salt?

Filtration, evaporation, crystallisation, chromotography.

Filtration, evaporation, heating.

Filtration, evaporation, crystallisation.

1

Why is the line in chromatography drawn in pencil?

A pencil line is easier to see.

A pencil line is insoluble in water.

A pencil line will not dissolve.

1

How many electrons can the first four shells hold in total?

18

34

36