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OCR June 2018 paper 2

Last updated 7 months ago

15 questions

Note from the author:

Instructions

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Question 1

1.

Carbon dioxide

Carbon monoxide

Hydrogen

Question 2

2.

4H^+ ⟶ 2H_2

H_2O ⟶ 2H^+ + O^{2-}

H^+ + OH^− ⟶ H_2O

Question 3

3.

Nanoparticles are much smaller than atoms.

Nanoparticulate materials can be used as catalysts.

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

Question 4

4.

Ethanol is an ionic compound.

The forces of attraction between ethanol molecules are strong.

The forces of attraction between ethanol molecules are weak.

Question 5

5.

CH_4

CO_2

H_2O

Question 6

6.

Electrons are transferred from one atom to another.

Electrons are delocalised.

Question 7

7.

Consists of just one element or compound

Has a low melting point

Is a mixture of two or more substances

Question 8

8.

Alumina

Glass

Pencil line

Question 9

9.

The difference between the energy of the reactants and the products

The energy needed for a reaction to start

The energy of the products

Question 10

10.

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.

Question 11

11.

Oxygen is given off.

The magnesium melts.

The magnesium is oxidised to magnesium oxide.

Question 12

12.

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

Question 13

13.

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.

Question 14

14.

0.07 nm

0.40 nm

50 nm

Question 15

15.

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.