AS & A Level Chemistry - 9701 Paper 1 2017 Summer Zone 3

The ion $Y^{3-}$ contains 18 electrons and has a mass number of 31.
How many protons and neutrons does $Y^{3-}$ contain? [Table_1]

A 0.216g sample of an aluminium compound X reacts with an excess of water to produce a single hydrocarbon gas. This gas burns completely in $O_2$ to form $H_2O$ and $CO_2$ only. The volume of $CO_2$ at room temperature and pressure is 108 $cm^3$.
What is the formula of X?

Which equation correctly describes the complete combustion of an alkene, $C_nH_{2n}$?

Two conversions are shown.

$\text{NH}_4^+ \rightarrow \text{NH}_3$
$\text{C}_2\text{H}_4 \rightarrow \text{C}_2\text{H}_6$

Which similar feature do these two conversions have?

All gases listed are at the same pressure.
Which gas will most closely approach ideal behaviour?

The following data are needed for this question.
$\Delta H^\circ_f(\text{CO(g)}) = -111 \text{ kJ mol}^{-1}$
$\Delta H^\circ_f(\text{CO}_2\text{(g)}) = -394 \text{ kJ mol}^{-1}$
$\Delta H^\circ_f(\text{Fe}_2\text{O}_3\text{(s)}) = -822 \text{ kJ mol}^{-1}$
Carbon monoxide reacts with iron(III) oxide.
$$3\text{CO(g)} + \text{Fe}_2\text{O}_3(\text{s}) \rightarrow 3\text{CO}_2(\text{g)} + 2\text{Fe}(\text{s})$$
What is the enthalpy change when 55.8 g of iron are produced by this reaction?

Vanadium reacts with dilute sulfuric acid to form $V_2(SO_4)_3$ and hydrogen gas.
What happens to vanadium atoms in this reaction?

Na₂S₂O₃ reacts with HCl as shown.

$$\text{Na}_2\text{S}_2\text{O}_3(\text{aq}) + 2\text{HCl}(\text{aq}) \rightarrow 2\text{NaCl}(\text{aq}) + \text{H}_2\text{O}(\text{l}) + \text{SO}_2(\text{g}) + \text{S}(\text{s})$$

When calculating the oxidation number of sulfur in Na₂S₂O₃, the \textbf{average} oxidation number of the two sulfur atoms should be found.
What is the oxidation number of sulfur in each of Na₂S₂O₃, SO₂, and S?

Ammonia is produced by the Haber process.
$$\text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3 \quad \Delta H^\circ = -92\text{ kJ mol}^{-1}$$
A fault in the temperature control during the process resulted in the temperature changing to 600°C for two hours.
What effect did this have on the ammonia production during this time?

For the reaction shown, an equilibrium is established at a temperature of 700K.
The equilibrium constant, $K_p$, for the reaction is 9.80 kPa. The partial pressure of $N_2O_4$ at equilibrium is 80.0 kPa.

$N_2O_4(g) \rightleftharpoons 2NO_2(g)$

What is the partial pressure of $NO_2$ at equilibrium?

The diagram shows the Boltzmann distribution of the energy of gaseous molecules at a particular temperature.
Which statement is correct?

Magnesium chloride, $MgCl_2$, and silicon tetrachloride, $SiCl_4$, are separately added to water.
What are the approximate pH values of the solutions formed?
[Table_1]

Which graph correctly shows the relative melting points of the elements Mg, Al, Si and P plotted against their relative first ionisation energies?

The table gives information about calcium carbonate and calcium hydroxide. Which row is correct?
[Table_1]

Which row correctly describes the reactions of calcium and strontium with water? [Table_1]

Chlorine gas is added to cold, aqueous sodium hydroxide. In a separate experiment, chlorine gas is added to hot, aqueous sodium hydroxide. Which oxidation states of chlorine are found in the reactants and products of the two reactions that take place?

A test-tube of HBr(g) and a separate test-tube of HI(g) are heated to the same temperature.
Which combination of observations is possible?

Ammonia exists as simple covalent molecules, NH₃. Ammonia can react with suitable reagents to form products containing ammonium ions, $\text{NH}_4^+$. Ammonia can also react with suitable reagents to form products containing amide ions, $\text{NH}_2^-$. Which of these nitrogen-containing species are present in an aqueous solution of ammonia?

What would be produced when 60 g of nitrogen monoxide react with an excess of carbon monoxide in a catalytic converter?

Structural isomerism and stereoisomerism should be considered when answering this question.
Which formula identifies a single substance?

Structural isomerism and stereoisomerism should be considered when answering this question. If a molecule contains two non-identical chiral carbon atoms, four optical isomers exist. How many isomers are there with
● molecular formula $C_7H_{14}O$ and
● a five-membered ring and
● a tertiary alcohol group?

The formulae of three compounds are shown.

$\text{C}_3\text{H}_7\text{CHO}$      $\text{C}_2\text{H}_5\text{COCH}_3$      $\text{CH}_2\text{CHCH}_2\text{CH}_2\text{OH}$

Only one of these compounds will decolourise bromine water. Only one of these compounds will produce a silver mirror with Tollens' reagent.

Which row shows the correct results?

[Table_1]

Carboxylic acids may be prepared by several different methods. In which reaction would propanoic acid be formed?

The diagram represents the structure of a polymer.
By which method might this polymer be made?

Bromine reacts with ethene in the dark.
Which description of the organic intermediate in this reaction is correct?

Which statement about butan-1-ol, butan-2-ol, and 2-methylbutan-2-ol is not correct?

Which compound will react with acidified potassium dichromate(VI) and with alkaline aqueous iodine?

Chlorogenic acid is found in green coffee beans and is used in treatments for weight loss.
[Image_1: Structure of chlorogenic acid]
What is produced in good yield when chlorogenic acid is treated with an excess of sodium carbonate solution at room temperature?

Butanoic acid can be produced from 1-bromopropane using reagents X and Y as shown.

What could be reagents X and Y?

How many esters with the molecular formula $C_5H_{10}O_2$ can be made by reacting a primary alcohol with a carboxylic acid?

Which statements about the atoms $^{23}\text{Na}$ and $^{24}\text{Mg}$ are correct?
1. They have the same number of filled electron orbitals.
2. They have the same number of neutrons.
3. They are both reducing agents.

Which compounds contain covalent bonds?
1. aluminium chloride
2. ammonia
3. calcium fluoride

Ethyleneglycol, HOCH$_2$CH$_2$OH, is used as a de-icer. It allows ice to melt at temperatures below 0°C.
Which statements are correct?
1. Ethylene glycol changes the extensive network of hydrogen bonds in ice.
2. Ethylene glycol molecules form hydrogen bonds with other ethylene glycol molecules.
3. Ethylene glycol molecules will dissolve in the water formed from the ice.

The responses A to D should be selected on the basis of

The formula of a solid magnesium compound is $\text{Mg(NO}_3\text{)}_2\cdot6\text{H}_2\text{O}$. When the solid compound is heated in a hard-glass test-tube, one or more changes are observed.

Which statements are correct?
1. Strong heating produces a basic residue.
2. Strong heating produces a brown gas.
3. Gentle heating produces colourless droplets of liquid on the upper parts of the test-tube.

Sulfur dioxide is an atmospheric pollutant.
What might result from the release of sulfur dioxide gas into the atmosphere?
1. reduction of $\text{NO}_2$ to $\text{NO}$
2. depletion of aquatic life
3. corrosion of limestone statues

Which mechanisms are represented in this sequence of reactions?

$\text{CH}_3\text{CH}_2\text{CH}_3 \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{Cl} \rightarrow \text{CH}_3\text{CH}_2\text{CH}_2\text{OH} \rightarrow \text{CH}_3\text{CH} \rightarrow \text{CH}_3\text{CHBrCH}_2\text{Br}$

Which compounds, on heating with ethanolic NaOH, produce more than one product with molecular formula $C_4H_8$?
1. 2-bromobutane
2. 2-bromo-2-methylpropane
3. 1-bromo-2-methylpropane

Substance M is refluxed with aqueous sodium hydroxide. One of the products of this reaction reacts with alkaline aqueous iodine to give a pale yellow precipitate.
Which compounds could be substance M?

Propanal will react with hydrogen cyanide to form 2-hydroxybutanenitrile. A suitable catalyst for this reaction is sodium cyanide.
$$\text{CH}_3\text{CH}_2\text{CHO} + \text{HCN} \xleftrightarrow{\text{NaCN}} \text{CH}_3\text{CH}_2\text{CH(OH)CN}$$
Which statements about this reaction of propanal with hydrogen cyanide are correct?
1. The CN\(^-\) ion attacks the propanal molecule to form an intermediate ion.
2. The product of the reaction has a chiral carbon atom.
3. The CN\(^-\) ion is a stronger electrophile than the HCN molecule.