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OCR June 2018 paper 2

Last updated 5 months ago

15 questions

Note from the author:

Instructions

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Question 1

1.

Carbon dioxide

Carbon monoxide

Hydrogen

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Question 2

2.

4H^+ ⟶ 2H_2

H_2O ⟶ 2H^+ + O^{2-}

H^+ + OH^− ⟶ H_2O

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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.

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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.

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Question 5

5.

CH_4

CO_2

H_2O

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Question 6

6.

Electrons are transferred from one atom to another.

Electrons are delocalised.

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Question 7

7.

Consists of just one element or compound

Has a low melting point

Is a mixture of two or more substances

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Question 8

8.

Alumina

Glass

Pencil line

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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

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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.

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Question 11

11.

Oxygen is given off.

The magnesium melts.

The magnesium is oxidised to magnesium oxide.

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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

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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.

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Question 14

14.

0.07 nm

0.40 nm

50 nm

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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.