OCR A Level Chemistry B (Salters) Fundamentals of chemistry June 2018 question paper H433/01

2h 15m 110 marks

Materials

36 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 equation represents a possible fusion reaction?

$Question 1, shown as an image$

[1]

Answer

Which solutions when mixed would give a solution of a salt?

A barium hydroxide and sulfuric acid

B lead nitrate and sulfuric acid

C silver nitrate and hydrochloric acid

D lithium hydroxide and hydrochloric acid

$Question 2, shown as an image$

[1]

Answer

Which statement about an atomic emission spectrum is correct?

A It occurs when electrons absorb energy.

B The wavelength of a line is proportional to the energy lost by electrons.

C The wavelengths of the lines are the same as in an absorption spectrum of the same element.

D The lines in the emission spectrum of lithium give a yellow colour to a lithium flame.

$Question 3, shown as an image$

[1]

Answer

Which statement about NO_x pollution is correct?

A It is only produced in petrol engines.

B It can cause acid rain.

C It is not removed at all by catalytic converters.

D It consists mainly of NO₃ gas.

$Question 4, shown as an image$

[1]

Answer

Which statement about a by-product of an industrial reaction is correct?

A It is formed in the same reaction as the product.

B It is formed when the reactants react in a different way.

C It is in the equation for the reaction.

D It is a minor reactant in the reaction.

$Question 5, shown as an image$

[1]

Answer

[1]

Answer

Chlorine reacts with bromide ions in sea water, producing bromine. Which statement about this process is not correct?

A Bromide ions are oxidised.

B The chlorine is obtained from sea water.

C Bromine forms because it is more reactive than chlorine.

D Chlorine molecules are reduced.

$Question 7, shown as an image$

[1]

Answer

Which formula has the correct systematic name?

	Formula Systematic name
A	Na₂SO₃ sodium sulfate(VI)
B	NaClO₃ sodium chlorate(III)
C	Cu₂S copper(I) sulfide
D	Pb(NO₃)₂ lead(II) nitrate(III)

$Question 8, shown as an image$

[1]

Answer

$Question 9, shown as an image$

Which statement is correct?

A The catalyst increases the yield of Y.

B Increasing the temperature shifts the position of equilibrium to the products side.

C The catalyst does not take part in the reaction.

D The reverse reaction is speeded up by the catalyst.

$Question 9, shown as an image$

[1]

Answer

[1]

Answer

What is not correct for the reaction between aqueous OH^– ions and bromoethane?

A OH^– ions behave as nucleophiles.

B An alcohol is produced.

C The reaction is faster if chloroethane is used.

D The reaction occurs because of a polar C–Br bond.

$Question 11, shown as an image$

[1]

Answer

Colorimetry is used to find the concentration of an orange solution of iodine. Which statement is correct?

A The more concentrated the solution the more light is transmitted.

B A yellow coloured filter should be used.

C The absorbance of solutions of known concentration should be measured to get a calibration curve.

D Orange light is absorbed.

$Question 12, shown as an image$

[1]

Answer

[1]

Answer

Which statement about p-orbitals is correct?

A A p-orbital is spherical in shape.

B A p-orbital can contain two electrons.

C There are six p-orbitals in a p-subshell.

An element with outer configuration p² has both electrons in the same p-orbital. D

$Question 14, shown as an image$

[1]

Answer

Which row is correct?

	Species	Protons	Neutrons in isotope	Electrons
A	F^–	9	10	11
B	Ne	10	10	10
C	Na⁺	11	10	11
D	Mg²⁺	14	10	12

$Question 15, shown as an image$

[1]

Answer

Which statement about the rate determining step of a reaction is correct?

A It is the fast step.

B It cannot involve a catalyst.

C It does not involve zero order reagents.

D It is always between two first-order reagents.

$Question 16, shown as an image$

[1]

Answer

An unsaturated carboxylic acid has an M_r of 280. 70 g of the acid is saturated by 1.0 g of hydrogen.

How many C=C bonds are there in one molecule of the acid?

A 1

B 2

C 4

D 8

$Question 17, shown as an image$

[1]

Answer

Sodium carbonate reacts with hydrochloric acid as shown in the equation.

$Question 18, shown as an image$

What mass (in grams) of Na₂CO₃ will react exactly with 50 cm³ of 2.0 mol dm^–3 HCl ?

A 0.05

B 5.3

C 10.6

D 21.2

$Question 18, shown as an image$

[1]

Answer

Which compound will react with acidified potassium dichromate(VI)?

A CH₃CH(OH)COOH

B (CH₃)₃COH

C CH₃COOH

D CH₃COCH₃

$Question 19, shown as an image$

[1]

Answer

Which statement is not correct about amines?

A The lone pair on the nitrogen allows them to act as nucleophiles.

B They react with carboxylic acids to form amides.

C They form hydrogen bonds with water.

D They accept protons from water molecules.

$Question 20, shown as an image$

[1]

Answer

The methane concentration in the atmosphere has increased from 0.722 ppm in pre-industrial times to 1.80 × 10^–4 % now.

What is the % increase in methane concentration?

A 40%

B 60%

C 67%

D 150%

$Question 21, shown as an image$

[1]

Answer

Which observation is correct?

A A solution of bromine water forms a purple layer when hexane is added.

B Aqueous silver nitrate forms a yellow precipitate when added to sodium bromide solution.

C When iodobutane and chlorobutane are separately refluxed with aqueous silver nitrate, a precipitate forms faster with iodobutane.

D Steamy fumes of hydrogen bromide are formed as the only gas when concentrated sulfuric acid is warmed with sodium bromide.

$Question 22, shown as an image$

[1]

Answer

[1]

Answer

Which statement about the Arrhenius equation is correct?

A A plot of ln k against T gives a straight line.

B When T is very large ln k almost equals ln A.

C E_a is the gradient of a plot of ln k against 1/T.

D A plot of k against 1/ T gives a straight line.

$Question 24, shown as an image$

[1]

Answer

[1]

Answer

Which statement about a strong base at 298 k is correct?

A It is partially ionised.

Its pH is given by pH = 14 + log[OH – ]. B

C It will not react with weak acids.

D It has the same pH as a weak base of the same concentration.

$Question 26, shown as an image$

[1]

Answer

[1]

Answer

Which statement/s is/are correct about solutions of amino acids with the general formula RCH(NH₂)COOH?

1 They contain zwitterions.

2 They react with sodium hydroxide.

3 They react with hydrochloric acid.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

$Question 28, shown as an image$

[1]

Answer

Which statement/s is/are a result of delocalisation in benzene?

1 Benzene undergoes substitution reactions.

2 Benzene reacts faster with bromine than alkenes do.

3 The enthalpy change of hydrogenation of benzene is three times that of cyclohexene.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

$Question 29, shown as an image$

[1]

Answer

Kekulé represented benzene as:

Which statement/s follow/s from this structure?

1 All the carbon-carbon bonds are of equal length in benzene.

2 The C–C–C bond angle in benzene is 120°.

3 Benzene has a planar structure.

A 1, 2 and 3

B Only 1 and 2

C Only 2 and 3

D Only 1

$Question 30, shown as an image$

[1]

Answer

Long chain alkanes can be cracked to provide better fuels and raw materials for the chemical industry. One such cracking reaction is shown in equation 31.1.

$Question 31, shown as an image$

(a)

In a cracking reaction 1.50 tonnes of dodecane (C₁₂H₂₆) produce 478 kg of hexane (C₆H₁₄

Calculate the percentage yield of the reaction in equation 31.1.

[3]

Answer

(b)

Some students want to investigate the usefulness of hexane as a fuel.

(b)(i)

Describe an experiment they could use to determine the enthalpy change of combustion of liquid hexane in the laboratory.

[1]

Answer

(b)(ii)

Show how the result would be calculated from the measurements made when carrying out the experiment in part (b)(i).

[1]

Answer

(b)(iii)

Describe two ways in which the students could make the basic experiment more accurate.

[2]

Answer

(c)

The students are given some enthalpy changes of formation and use them to check the accuracy of their answer.

Calculate the standard enthalpy change of combustion of hexane from the data given.

Substance	_fH^ϴ / kJ mol^–1
CO₂(g)	–393
H₂O(l)	–286
C₆H₁₄(l)	–199

^ϴ hexane =........ kJ mol^–1 maths symbol _cH

[2]

Answer

(d)

The propene produced in equation 31.1 has many uses in the chemical industry.

$Question 31, shown as an image$

One of the substances produced from propene is an alcohol used as a cleaner and de-icer.

The¹³C NMR spectrum of this alcohol is shown below.

Draw the full structural formula of the alcohol in the box below, giving your reasoning.

[2]

Answer

(e)

The alcohol from (d) can be oxidised to a carbonyl compound.

Give the reagents and conditions to carry out this oxidation.

Reagents........

Conditions........

[1]

Answer

(f)

The carbonyl compound from (e) can be reacted further to produce other raw materials. For example, it reacts with HCN.

The formula of a carbonyl compound is shown below.

Give the mechanism for the reaction of this compound with cyanide ions followed by H +. Show curly arrows, relevant dipoles and charges and give the formula of the product.

Name the type of reaction.

[4]

Answer

(g)

[6]

Answer

Enzymes catalyse the breakdown of protein molecules in the digestive system. The tertiary structure of enzymes enables the substrate to bind to them.

(a)

State the meaning of the term tertiary structure of a protein.

[1]

Answer

(b)

Give two ways a substrate can bind to an enzyme.

1........

2........

[1]

Answer

(c)

Some students hydrolyse a protein in the laboratory by refluxing it with moderately concentrated hydrochloric acid.

(c)(i)

[1]

Answer

(c)(ii)

Give the organic products of the complete hydrolysis of this protein section with hydrochloric acid.

[4]

Answer

(d)

* The students use paper chromatography to confirm that the products of hydrolysis are those in part (c)(ii).

Describe how the students would develop and analyse the chromatogram to identify the products of hydrolysis.

You may include a diagram in your answer.

[6]

Answer

(a)(i)

Suggest the reagent and conditions the students used for the hydrolysis.

[1]

Answer

(a)(ii)

Suggest how the students could obtain a sample of compound C from the solution they obtained.

[2]

Answer

(a)(iii)

The students reacted procaine with ethanoyl chloride.

Give the formula of the organic product formed.

[1]

Answer

(b)

Compounds B and C can be turned into monomers for polymerisation reactions.

Give the structural formula for the repeat units of polymers D and E and give the type polymerisation occurring in each case.

[2]

Answer

The use of cars can affect the concentration of ozone in the troposphere. Tropospheric ozone causes respiratory problems and photochemical smog.

Tropospheric ozone is formed in a series of reactions involving carbon monoxide, oxides of nitrogen and volatile organic compounds, all of which are present in exhaust emissions.

(a)

NO is a radical.

Draw a ‘ dot-and-cross ’ diagram of NO and explain why it is called a radical. Show outer electron shells only.

[1]

Answer

(b)

A series of reactions producing ozone from carbon monoxide, hydroxyl radicals and NO are shown in equations 34.1 – 34.5 below.

$Question 34, shown as an image$

(b)(i)

Explain why the reaction in equation 34.3 is classed as a propagation step.

[1]

Answer

(b)(ii)

Write in the box the overall equation for the reaction sequence in equations 34.1 – 34.5

[1]

Answer

(c)

[3]

Answer

A company was investigating the corrosion of metal parts used in oil rigs in the North Sea.

Chemists took two identical bolts. One was unused and the other had been exposed to the seawater for several weeks. They reacted each bolt with dilute sulfuric acid. All the unreacted iron was converted to Fe²⁺(aq) ions and the rust reacted to form Fe³⁺(aq).

(a)

Describe how the chemists would dissolve one bolt and make the solution up to 1.00 dm³ (a)

[2]

Answer

(b)

[3]

Answer

(c)

The iron rusted in small dips in the surface. The chemists noticed a green solid that turned orange at the surface of the water.

(c)(i)

Give the half-equations for the processes occurring during the rusting.

[2]

Answer

(c)(ii)

What are the formulae of the green and orange solids?

Green solid........

Orange solid........

[1]

Answer

(c)(iii)

Suggest why rusting takes place faster in seawater than in rainwater.

[1]

Answer

(d)

Give the electron configuration of the Fe²⁺ ion. (d)

[1]

Answer

(e)

[2]

Answer

(f)

(f)(i)

Suggest why the colour changes as the EDTA^4– is added and name the type of reaction (i) taking place.

[1]

Answer

(f)(ii)

[2]

Answer

Plants need nitrogen to synthesise proteins, but most plants cannot use atmospheric nitrogen. Ammonium nitrate is often used as a fertiliser as it contains nitrogen in a form that plants can absorb.

(a)

The first step in the process of making ammonium nitrate is the synthesis of ammonia from atmospheric nitrogen. This synthesis reaction has a very high activation enthalpy. Explain this in terms of the bonding in nitrogen.

[1]

Answer

(b)

The hydrogen needed to manufacture ammonia can be produced from steam and methane as shown in equation 36.1 below.

$Question 36, shown as an image$

(b)(i)

Use the entropy values in the table below to calculate maths symbol _sysS for the forward reaction in equation 36.1.

Substance	Entropy S / J K^–1 mol^–1
CH₄(g)	186.2
H₂O(g)	189.0
CO(g)	197.6
H₂(g)	130.6

=........ J K^–1 mol^–1 maths symbol _sysS

[1]

Answer

(b)(ii)

Explain how the sign of your answer to (i) is predicted by equation 36.1.

[1]

Answer

(c)

Calculate the minimum temperature required for the forward reaction in equation 36.1 to be feasible.

Give your answer to an appropriate number of significant figures.

[2]

Answer

(d)

$Question 36, shown as an image$

Another source of hydrogen is from the reaction shown in equation 36.2.

$Question 36, shown as an image$

This is claimed to be a much greener process than that in equation 36.1.

Comment on the validity of this statement, considering:

• the raw materials used

• the operating conditions

• the mole ratios.

[3]

Answer

(e)

[3]

Answer

(f)

In order to make the ammonium nitrate fertiliser, some of the ammonia is oxidised to nitric acid in several stages shown by equations 36.4–36.6.

$Question 36, shown as an image$

The nitric acid formed is reacted with more ammonia.

$Question 36, shown as an image$

(f)(i)

Use oxidation states or some other method to balance equation 36.4.

[1]

Answer

(f)(ii)

The overall yield of the reactions in equations 36.4 – 36.6 is 77%. The yield of ammonium nitrate in equation 36.7 can be taken as 100%.

What mass (in tonnes) of ammonia is needed to make 25 tonnes of ammonium nitrate?

mass of ammonia needed =........ tonnes

[4]

Answer

(f)(iii)

Describe a test that would identify nitrate ions.

[2]

Answer

The paper as printed

Spotted a mistake on this page?Report a problem

OCR H433 · 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

Question 23

Question 24

Question 25

Question 26

Question 27

Question 28

Question 29

Question 30

Question 31

Question 32

Question 33

Question 34

Question 35

Question 36