May/June 2026 Paper 21

2026 · 5 questions · 38 parts · 60 marks

0/60 marks

0Correct0Partial0Wrong38Unattempted

Filters0 active

Questions

Select a part to jump to its question

Finish set

1(a)(i)Covalent BondingEasy1 mark

Complete the dot-and-cross diagram in Figure 1.1 to show the arrangement of outer shell electrons in a molecule of SF

_{6}

Draw with the mouse or a finger.

1(a)(ii)Molecular Shape PolarityEasy1 mark

Name the shape of a molecule of SF

_{6}

Context for 1(b)

Table 1.1 shows information about sulfur and chlorine.

Table 1.1

element	electronic configuration	first ionisation energy / kJ mol $^{- 1}$
sulfur	[Ne] 3s $^{2}$ 3p $^{4}$	1000
chlorine	[Ne] 3s $^{2}$ 3p $^{5}$	1260

1(b)(i)Electron Configuration OrbitalsEasy1 mark

Name the orbital that contains the lowest energy electron in an atom of sulfur, and draw the shape of this orbital.

Draw with the mouse or a finger.

1(b)(ii)Ionisation EnergyEasy1 mark

Construct an equation to represent the first ionisation energy of chlorine.

Answer

0 words

1(b)(iii)Ionisation EnergyMedium3 marks

Explain the difference in the values of first ionisation energy of sulfur and chlorine in Table 1.1.

Answer

0 words

1(c)(i)Molecular Shape PolarityMedium3 marks

A molecule of SCl

_{2}

is polar. Predict bond angle

x

in Figure 1.2 using VSEPR theory. Explain your answer.

Figure 1.2, a skeletal diagram of a bent SCl2 molecule: sulfur at the vertex with a bond up to the left to one Cl atom and a bond up to the right to the other Cl atom, with the angle between the two S-Cl bonds labelled x

Bond angle

x

Explanation

0 words

1(c)(ii)Molecular Shape PolarityEasy1 mark

Show on Figure 1.3 all the dipoles present in the molecule of SCl

_{2}

Draw with the mouse or a finger.

1(d)(i)Intermolecular Forces Physical PropertiesEasy1 mark

SCl

_{2}

and H

_{2}

O both contain instantaneous dipole-induced dipole attractions and permanent dipole attractions. Complete Table 1.2 by giving the total number of electrons in a molecule of SCl

_{2}

	SCl $_{2}$	H $_{2}$ O
total number of electrons per molecule	Table answer r1_SCl$_{2}$	10

1(d)(ii)Intermolecular Forces Physical PropertiesEasy1 mark

Identify which molecule, SCl

_{2}

or H

_{2}

O, has the stronger instantaneous dipole-induced dipole attractions. Explain your answer.

Answer

0 words

1(d)(iii)Molecular Shape PolarityEasy1 mark

_{2}

O has a greater dipole moment than SCl

_{2}

. Explain why.

Answer

0 words

1(e)Empirical Molecular FormulaeMedium3 marks

Compound X contains sulfur and chlorine only. 100.0 g of X contains 47.49 g of sulfur. The relative molecular mass,

M_{r}

, of X is 135.2. Determine the molecular formula of X. Show your working.

Working

0 words

Molecular formula of X