OCR GCSE Chemistry A (Gateway) Paper 1 Foundation June 2022 question paper J248/01

1h 45m 90 marks

22 questions

Report a problem

Question

What is wrong?

Text or a picture is cut off or split Something on the paper is not here The text does not read properly The marks are wrong Something else

Goes to whoever maintains the question split. No account needed and nothing is published on this page.

Which state symbol is used for liquids?

A (aq)

B (g)

C (l)

D (s)

$Question 1, shown as an image$

[1]

Answer

Which particle model diagram shows a gas?

$Question 2, shown as an image$

[1]

Answer

Which substance has four covalent bonds to each carbon atom?

A Carbon nanotubes

B Diamond

C Graphene

D Graphite

$Question 3, shown as an image$

[1]

Answer

Which is correct about any two elements with the same number of electron shells?

A They are both metals.

B They are both non-metals.

C They are both in the same group on the Periodic Table.

D They are both in the same period on the Periodic Table.

$Question 4, shown as an image$

[1]

Answer

The table shows the results when four solutions are tested with universal indicator and a pH probe.

Solution	Colour when universal indicator is added	Reading on pH probe
A	blue	12
B	green	7
C	purple	14
D	red	2

Which solution is an acid?

$Question 5, shown as an image$

[1]

Answer

Which pieces of apparatus are used for filtration ?

A Beaker, filter paper and condenser

B Beaker, filter paper and funnel

C Beaker, funnel and mass balance

D Filter paper, funnel and condenser

$Question 6, shown as an image$

[1]

Answer

Which description is correct for melting ice?

A There is a chemical change and a change of state.

B There is a chemical change and a reaction occurs.

C There is a physical change and a change of state.

D There is a physical change and a reaction occurs.

$Question 7, shown as an image$

[1]

Answer

[1]

Answer

During the electrolysis of molten sodium chloride, sodium and chlorine are formed.

What happens at the positive electrode (anode)?

The chloride ion, C l –, gains an electron. A

The chloride ion, C l –, loses an electron. B

The sodium ion, Na +, gains an electron. C

The sodium ion, Na +, loses an electron. D

$Question 9, shown as an image$

[1]

Answer

What did Rutherford suggest about the model of the atom?

A Atoms contain a nucleus.

B Atoms contain electrons.

C The atom is a solid sphere like a billiard ball.

D The nucleus is made up of protons and neutrons.

$Question 10, shown as an image$

[1]

Answer

What is the relative formula mass of potassium chloride, KC l ?

Relative atomic mass (A_r): Cl = 35.5 K = 39.1

A 36.0

B 67.4

C 74.6

D 79.0

$Question 11, shown as an image$

[1]

Answer

Mendeleev swapped the positions of the elements tellurium and iodine when he was creating his Periodic Table. This meant that the atomic masses were not in order.

Why were the atomic masses not in order?

A He developed his table without knowing about atomic structure.

B He measured the atomic masses incorrectly.

C He left gaps for undiscovered elements.

D He put the elements in order of increasing reactivity.

$Question 12, shown as an image$

[1]

Answer

Which particles are smaller than 1 × 10^–9 m? 13

A Nanoparticles, molecules and atoms

B Nanoparticles, neutrons and electrons

C Neutrons, atoms and electrons

D Neutrons, polymers and protons

$Question 13, shown as an image$

[1]

Answer

The element mercury is a liquid at 25 °C.

Which row about mercury is correct?

	Melting Point (°C)	Boiling Point (°C)
A	above 25	above 25
B	below 25	below 25
C	below 25	above 25
D	above 25	below 25

$Question 14, shown as an image$

[1]

Answer

Which products are formed in the electrolysis of aqueous copper sulfate, CuSO₄ using inert electrodes?

A Copper and oxygen

B Copper and sulfur dioxide

C Hydrogen and oxygen

D Hydrogen and sulfur dioxide

$Question 15, shown as an image$

[1]

Answer

(a)

Complete the sentences about the structure of an atom. Use words from the list.

electrons negative neutral neutrons positive protons

An atom has a nucleus with a........ charge. The nucleus is made up of

........ and........

[3]

Answer

(b)(i)

Look at the information about two isotopes of boron.

Which statements about the isotopes of boron are correct?

Tick (✓) two boxes.

$Question 16, shown as an image$

[2]

Answer

(b)(ii)

The diagram shows a boron atom.

Explain why boron is in Group 3 of the Periodic Table.

[1]

Answer

(c)

Chlorine is in Group 7 of the Periodic Table. Chlorine is a non-metal.

Why do non-metals form negative ions?

[2]

Answer

(d)

Chlorine reacts with aluminium to form aluminium chloride.

• The formula for aluminium chloride is Al Cl₃.

• The symbol for a chloride ion is C l –.

What is the symbol for an aluminium ion?

[1]

Answer

(a)

Complete the word equation for neutralisation.

$Question 17, shown as an image$

[1]

Answer

(b)

A student reacts magnesium carbonate with dilute hydrochloric acid. Carbon dioxide gas and a salt are made.

(b)(i)

What is the name of the salt made?

[1]

Answer

(b)(ii)

The diagram shows the apparatus the student uses.

How can the student tell when the reaction is complete?

[1]

Answer

(b)(iii)

The student records the mass on the balance every 2 minutes for 12 minutes.

The student’s results are shown in the table.

Time (minutes)	Mass (g)
0	154.2
2	150.5
4	148.2
6	146.5
8	145.3
10	144.0
12	142.9

The mass before the reaction starts is 154.2 g.

How much carbon dioxide gas is made after 8 minutes?

[2]

Answer

(c)(i)

The student wants to prepare a pure, dry sample of the soluble salt. This is made by reacting magnesium carbonate and dilute hydrochloric acid.

Select the three correct steps that the student uses to prepare the pure, dry salt.

Put them in the order the student completes each step by labelling them 1, 2 and 3.

$Question 17, shown as an image$

[3]

Answer

(c)(ii)

The student does the experiment 4 times.

They measure the mass of salt produced. Their results are shown in the table.

Experiment number	Mass of salt (g)
1	20.95
2	22.36
3	21.78
4	23.40

Calculate the mean mass of salt produced.

Give your answer to 3 significant figures.

[3]

Answer

(a)(i)

The scientist thinks substance A is an ionic compound.

Explain why the scientist is correct.

[2]

Answer

(a)(ii)

Which of the substances is a simple covalent compound?

Explain your answer.

[3]

Answer

(a)(iii)

What is the state of substance B at room temperature?

$Question 18, shown as an image$

Solid Liquid Gas

[1]

Answer

(b)

The scientist investigates some metals and metal alloys.

(b)(i)

Describe the structure and bonding in a metal.

You can include a labelled diagram in your answer.

[3]

Answer

(b)(ii)

Explain why metals are malleable.

[1]

Answer

(b)(iii)

Explain why metals can conduct electricity.

[2]

Answer

(b)(iv)

The scientist has a diagram of one type of metal alloy as shown.

What is the smallest ratio of lead to tin in the alloy?

[2]

Answer

(b)(v)

The table shows data about other alloys made from tin, copper and silver.

	Alloy 1	Alloy 2	Alloy 3
Tin content (%)	95.5	99.0	96.5
Copper content (%)	0.7	0.7	0.5
Silver content (%)	3.8	0.3	3.0
Melting point (°C)	217	227	220

What is the relationship between the silver content and the melting point?

[1]

Answer

A student investigates dyes.

(a)

Some dyes are nanoparticles.

(a)(i)

What is the size of a nanoparticle?

Tick (✓) one box.

$Question 19, shown as an image$

[1]

Answer

(a)(ii)

Some people think using nanoparticulate materials is dangerous. Other people want to keep using them.

State one advantage and one disadvantage of using nanoparticulate materials.

Advantage........

Disadvantage........

[2]

Answer

(b)

The student uses paper chromatography to separate the dyes.

The diagram shows the apparatus at the start of the experiment.

Label the apparatus. Use phrases from the list.

[3]

Answer

(c)

At the end of the experiment one of the dyes has moved 55 mm.

The solvent has moved 65 mm.

(c)(i)

Calculate the R_f value of this dye.

Give your answer to 2 significant figures.

[2]

Answer

(c)(ii)

Another dye, X, has an R_f value of 0.22.

The student knows that the food colouring tartrazine has an R_f value of 0.11.

The student thinks dye X is tartrazine.

Explain why the student is incorrect.

[2]

Answer

20* The table shows the results of two chemical reactions, A and B.

	Temperature at the start of the reaction (°C)	Temperature at the end of the reaction (°C)	Energy change (kJ / mol)
Reaction A	25.5	32.1	– 157
Reaction B	23.4	18.3	+ 241

(a)

Use the information in the table to state if each of the reactions, A and B, are exothermic or endothermic.

Explain your answers.

[6]

Answer

(b)

A teacher wants to calculate the temperature change of another reaction.

The diagram shows the apparatus they use.

(b)(i)

The teacher measures the temperature of the reaction at the start and end of the reaction.

What apparatus do they use to measure the temperature?

[1]

Answer

(b)(ii)

The temperature of the reaction does not change. The teacher thinks too much heat is escaping from the apparatus.

Suggest two ways they can improve the apparatus to stop the heat escaping.

[2]

Answer

(c)

[3]

Answer

The diagram shows a ball and stick model for ethene, C₂H₄.

(a)

Which statements about this ball and stick model of ethene are correct?

Tick (✓) two boxes.

$Question 21, shown as an image$

[2]

Answer

(b)

Molecules can be drawn using dot and cross diagrams.

Complete the dot and cross diagram for bromine, Br₂.

Show the electrons in the outer shells only.

[2]

Answer

(c)

At room temperature, ethene is a gas and bromine is a liquid.

Use the particle model to describe two differences between the movement or arrangement of the particles in ethene and the particles in bromine.

[2]

Answer

(d)

Ethene reacts with bromine to make a product.

The relative formula mass of the product is 187.8.

There are 2 carbon atoms and 4 hydrogen atoms in the product.

Calculate how many bromine atoms are in the product.

[3]

Answer

A student has a sample of a liquid.

(a)(i)

State a method the student uses to find out if the sample is pure.

[1]

Answer

(a)(ii)

The student finds out that the sample is impure.

The sample contains hexane, C₆H₁₄, and cyclohexane, C₆H₁₂.

What is the empirical formula of hexane?

[1]

Answer

(a)(iii)

The boiling point of hexane is lower than the boiling point of cyclohexane.

Describe a method the student could use to obtain a sample of pure hexane from the mixture of cyclohexane and hexane.

You can include a labelled diagram in your answer.

[4]

Answer

(b)(i)

The student obtains 12.0 g of hexane from 15.2 g of the mixture of hexane and cyclohexane.

Calculate the percentage of hexane obtained.

Give your answer to 2 significant figures.

[2]

Answer

(b)(ii)

Hexane reacts with oxygen in a combustion reaction.

Complete the balanced symbol equation for this reaction.

$Question 22, shown as an image$

[1]

Answer

The paper as printed

Spotted a mistake on this page?Report a problem

OCR J248 · Paper 1

Question 1

Question 2

Question 3

Question 4

Question 5

Question 6

Question 7

Question 8

Question 9

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19

Question 20

Question 21

Question 22