OCR June 2018 paper 2

Instrukcije

Work through the questsions.

For any answers that you get wrong, write out the hint into your books.

(or a summary of the hint).

Some of these will be for topics you haven't done yet.

We call this "flipped learning"

Answer all the questions.

You should spend a maximum of 30 minutes on this section.

1

What is the name of the gas made when magnesium reacts with sulfuric acid?

Carbon dioxide

Carbon monoxide

Hydrogen

Oxygen

1

Which equation represents neutralisation?

4H^+ ⟶ 2H_2

H_2O ⟶ 2H^+ + O^{2-}

H^+ + OH^− ⟶ H_2O

O_2 + H_2 ⟶ H_2O + O^{2-}

1

Which statement about nanoparticulate materials is not correct?

Nanoparticles are much smaller than atoms.

Nanoparticulate materials can be used as catalysts.

Nanoparticulate materials have an extremely large surface area to volume ratio.

There are possible risks when using nanoparticulate materials which are difficult to predict.

1

Ethanol is a liquid at room temperature. It has a low melting point and boiling point. Why?

Ethanol is an ionic compound.

The forces of attraction between ethanol molecules are strong.

The forces of attraction between ethanol molecules are weak.

There are no forces of attraction between ethanol molecules.

1

Look at the equation. CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O Which substance is the reduced in this reaction?

CH_4

CO_2

H_2O

O_2

1

Which statement about covalent bonding is true?

Electrons are transferred from one atom to another.

Electrons are delocalised.

Electrons are shared between atoms. (pair of electrons)

Ions are formed.

1

Which statement correctly describes a pure substance?

Consists of just one element or compound

Has a low melting point

Is a mixture of two or more substances

Melts over a range of temperatures

1

A student separates a dye using thin layer chromatography.
She puts a thin layer of solid alumina onto a glass plate.
She puts the dye on the pencil line.
She puts the glass plate into a tank containing water.
Which of the following is the stationary phase?

Alumina

Glass

Pencil line

Water

1

What is the activation energy for a reaction?

The difference between the energy of the reactants and the products

The energy needed for a reaction to start

The energy of the products

The energy of the starting materials

1

Which is the best explanation of a concentrated acid?
Do not confuse concentrated with strong!

The acid is completely ionised in solution in water.

The acid is partially ionised in solution in water.

There is a large amount of acid and a small amount of water.

There is a large amount of water and a small amount of acid.

1

Oxygen is given off.

The magnesium melts.

The magnesium is oxidised to magnesium oxide.

The magnesium reacts to make magnesium carbonate.

1

The equation shows a reaction that involves both oxidation and reduction.
Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe
Which statement about reduction is correct?

The gain of oxygen and the gain of electrons by a substance

The gain of oxygen and the loss of electrons by a substance

The loss of oxygen and the gain of electrons by a substance

The loss of oxygen and the loss of electrons by a substance

1

Niels Bohr was involved in the development of the atomic model.
Which of these statements describes his work?
Not on our specification - you need to know that the model has changed as a result of additional research.

He developed the idea of a nuclear atom.

He developed the plum-pudding model of the atom.

He stated that atoms were like tiny solid balls.

He stated that electrons exist in fixed energy levels.

1

What is the approximate size of a nanoparticle?

0.07 nm

0.40 nm

50 nm

1000 nm

1

Electrons are transferred from hydrogen atoms to carbon atoms.

The covalent bonds in methane are weak.

The force of attraction between methane molecules is weak.

The ionic bonds between carbon and hydrogen are very strong.

OCR June 2018 paper 2

What is the name of the gas made when magnesium reacts with sulfuric acid?

Which equation represents neutralisation?

Which statement about nanoparticulate materials is not correct?

Ethanol is a liquid at room temperature. It has a low melting point and boiling point. Why?

Look at the equation. CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O Which substance is the reduced in this reaction?

Which statement about covalent bonding is true?

Which statement correctly describes a pure substance?

A student separates a dye using thin layer chromatography.
She puts a thin layer of solid alumina onto a glass plate.
She puts the dye on the pencil line.
She puts the glass plate into a tank containing water.
Which of the following is the stationary phase?

What is the activation energy for a reaction?

Which is the best explanation of a concentrated acid?
Do not confuse concentrated with strong!

The equation shows a reaction that involves both oxidation and reduction.
Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe
Which statement about reduction is correct?

Niels Bohr was involved in the development of the atomic model.
Which of these statements describes his work?
Not on our specification - you need to know that the model has changed as a result of additional research.

What is the approximate size of a nanoparticle?

What is the name of the gas made when magnesium reacts with sulfuric acid?

Which equation represents neutralisation?

Which statement about nanoparticulate materials is not correct?

Ethanol is a liquid at room temperature. It has a low melting point and boiling point. Why?

Look at the equation. CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O Which substance is the reduced in this reaction?

Which statement about covalent bonding is true?

Which statement correctly describes a pure substance?

A student separates a dye using thin layer chromatography.
She puts a thin layer of solid alumina onto a glass plate.
She puts the dye on the pencil line.
She puts the glass plate into a tank containing water.
Which of the following is the stationary phase?

What is the activation energy for a reaction?

Which is the best explanation of a concentrated acid?
Do not confuse concentrated with strong!

Magnesium is heated in a crucible. The mass of the crucible and magnesium increases.
Which statement is the best explanation for this?

The equation shows a reaction that involves both oxidation and reduction.
Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe
Which statement about reduction is correct?

Niels Bohr was involved in the development of the atomic model.
Which of these statements describes his work?
Not on our specification - you need to know that the model has changed as a result of additional research.

What is the approximate size of a nanoparticle?

15 Look at the diagram of a methane molecule.
Which statement about methane is correct?

OCR June 2018 paper 2

OCR June 2018 paper 2

What is the name of the gas made when magnesium reacts with sulfuric acid?

Which equation represents neutralisation?

Which statement about nanoparticulate materials is not correct?

Ethanol is a liquid at room temperature. It has a low melting point and boiling point. Why?

Look at the equation. CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O Which substance is the reduced in this reaction?

Which statement about covalent bonding is true?

Which statement correctly describes a pure substance?

A student separates a dye using thin layer chromatography. She puts a thin layer of solid alumina onto a glass plate. She puts the dye on the pencil line. She puts the glass plate into a tank containing water. Which of the following is the stationary phase?

What is the activation energy for a reaction?

Which is the best explanation of a concentrated acid?Do not confuse concentrated with strong!

The equation shows a reaction that involves both oxidation and reduction.Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2FeWhich statement about reduction is correct?

Niels Bohr was involved in the development of the atomic model.Which of these statements describes his work?Not on our specification - you need to know that the model has changed as a result of additional research.

What is the approximate size of a nanoparticle?

What is the name of the gas made when magnesium reacts with sulfuric acid?

Which equation represents neutralisation?

Which statement about nanoparticulate materials is not correct?

Ethanol is a liquid at room temperature. It has a low melting point and boiling point. Why?

Look at the equation. CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O Which substance is the reduced in this reaction?

Which statement about covalent bonding is true?

Which statement correctly describes a pure substance?

A student separates a dye using thin layer chromatography. She puts a thin layer of solid alumina onto a glass plate. She puts the dye on the pencil line. She puts the glass plate into a tank containing water. Which of the following is the stationary phase?

What is the activation energy for a reaction?

Which is the best explanation of a concentrated acid?Do not confuse concentrated with strong!

Magnesium is heated in a crucible. The mass of the crucible and magnesium increases.Which statement is the best explanation for this?

The equation shows a reaction that involves both oxidation and reduction.Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2FeWhich statement about reduction is correct?

Niels Bohr was involved in the development of the atomic model.Which of these statements describes his work?Not on our specification - you need to know that the model has changed as a result of additional research.

What is the approximate size of a nanoparticle?

15 Look at the diagram of a methane molecule.Which statement about methane is correct?

A student separates a dye using thin layer chromatography.
She puts a thin layer of solid alumina onto a glass plate.
She puts the dye on the pencil line.
She puts the glass plate into a tank containing water.
Which of the following is the stationary phase?

Which is the best explanation of a concentrated acid?
Do not confuse concentrated with strong!

The equation shows a reaction that involves both oxidation and reduction.
Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe
Which statement about reduction is correct?

Niels Bohr was involved in the development of the atomic model.
Which of these statements describes his work?
Not on our specification - you need to know that the model has changed as a result of additional research.

A student separates a dye using thin layer chromatography.
She puts a thin layer of solid alumina onto a glass plate.
She puts the dye on the pencil line.
She puts the glass plate into a tank containing water.
Which of the following is the stationary phase?

Which is the best explanation of a concentrated acid?
Do not confuse concentrated with strong!

Magnesium is heated in a crucible. The mass of the crucible and magnesium increases.
Which statement is the best explanation for this?

The equation shows a reaction that involves both oxidation and reduction.
Fe_2O_3 + 2Al \rightarrow Al_2O_3 + 2Fe
Which statement about reduction is correct?

Niels Bohr was involved in the development of the atomic model.
Which of these statements describes his work?
Not on our specification - you need to know that the model has changed as a result of additional research.

15 Look at the diagram of a methane molecule.
Which statement about methane is correct?