Group IV (Group 14) Past Paper Questions — 9701 Paper 2

Q32021 May/Jun·P233 partsMediumChemical Periodicity

(a)(i)

Use the observations in the table to identify each sample as one of $\text{Ba(OH)}_2$ , $\text{NaCl}$ , $\text{P}_4\text{O}_{10}$ and $\text{SiCl}_4$ . Write your answers in the table.

	state at room temperature	observations on addition of sample to water
R	solid	alkaline, colourless solution is produced, some white solid remains
S	solid	white solid disappears, solution is neutral
T	liquid	misty fumes produced, white solid is made in vigorous reaction
U	solid	acidic, colourless solution produced in vigorous reaction

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(a)(ii)

Identify the formula of the white solid made when sample T reacts with water.

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(b)(ii)

Give the formula of another Period 3 oxide which behaves as a ceramic material.

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Q3(d)2013 Oct/Nov·P215MMediumGroup IV (Group 14)

(d)

Magnesium chloride, $\text{MgCl}_2$ , and silicon tetrachloride, $\text{SiCl}_4$ , each dissolve in or react with water.

Suggest the approximate pH of the solution formed in each case.

$\text{MgCl}_2$ : .................................

$\text{SiCl}_4$ : .................................

Explain, with the aid of an equation, the difference between the two values.

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Q3(d)2013 Oct/Nov·P225MMediumChemical Periodicity

(d)

Magnesium chloride, MgCl₂, and silicon tetrachloride, SiCl₄, each dissolve in or react with water.

Suggest the approximate pH of the solution formed in each case.

MgCl₂

SiCl₄

Explain, with the aid of an equation, the difference between the two values.

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Q32024 Oct/Nov·P214 partsMedium-EasyGroup IV (Group 14)

(a)(i)

Complete Table 3.1.

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(e)(i)

Write an equation for the formation of $\text{SiCl}_4$ from its constituent elements.

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(e)(ii)

Describe what is observed when a small sample of $\text{SiCl}_4$ is added to water.

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(f)

Tin forms an amphoteric oxide, $\text{SnO}_2$ .

Suggest the formula of the tin compound that forms when $\text{SnO}_2$ reacts with $\text{H}_2\text{SO}_4$ in an acid–base reaction.

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Q1(c)(i)2020 May/Jun·P212MMedium-EasyGroup IV (Group 14)

(c)(i)

Suggest an equation to describe the reaction occurring when gallium metal is exposed to air.

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Q1(h)2016 Oct/Nov·P212MMedium-EasyAtoms, Molecules and Stoichiometry

(h)

Calculate the relative atomic mass, $A_{\text{r}}$ , of $\text{X}$ and suggest its identity.

\begin{aligned} A_{\text{r}} \text{ of X} &= \text{............................} \\ \text{identity of X} &\quad \text{.............................................} \end{aligned}

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Q22019 May/Jun·P212 partsMedium-EasyGroup IV (Group 14)

(f)(i)

Identify the two products formed during this reaction.

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(f)(ii)

Describe the behaviour of the silicon dioxide during this reaction.

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Q32024 Oct/Nov·P233 partsEasyGroup IV (Group 14)

(e)(i)

Write an equation for the formation of $\text{SiCl}_4$ from its constituent elements.

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(e)(ii)

Describe what is observed when a small sample of $\text{SiCl}_4$ is added to water.

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(f)

Tin forms an amphoteric oxide, $\text{SnO}_2$ .

Suggest the formula of the tin compound that forms when $\text{SnO}_2$ reacts with $\text{H}_2\text{SO}_4$ in an acid–base reaction.

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Q3(a)2023 May/Jun·P212MEasyGroup IV (Group 14)

(a)

Chlorine reacts with silicon to form silicon(IV) chloride.

Describe the appearance of silicon(IV) chloride at room temperature and pressure. State its structure and bonding.

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Q1(e)2025 Oct/Nov·P212MMedium-EasyGroup IV (Group 14)

(e)

Chromium(IV) fluoride, $\text{CrF}_4$ , is a covalent molecule that shows similar chemical properties to $\text{SiCl}_4$ .

Suggest the type of reaction that occurs when $\text{CrF}_4$ is placed in water.

Construct a relevant equation for this reaction.

type of reaction .........................................................................................................................

equation ....................................................................................................................................

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