Covalent bonding and coordinate (dative covalent) bonding: past paper questions
Real questions on covalent bonding and coordinate (dative covalent) bonding
The newest 20 of 391 written questions. Open one to see it on the real paper.
- 9701/41 · May/June 2026 · Q5a[1]
Explain why a transition element, such as cobalt, has variable oxidation states in its compounds.
See it on the paper → - 9701/41 · May/June 2026 · Q5c[3]
Explain why compounds containing Co 2+ ions are coloured.
See it on the paper → - 9701/41 · May/June 2026 · Q5d[2]
A few drops of water are added to a piece of dry cobalt( II ) chloride paper. Describe the colour change that is seen. Write an equation for the reaction that causes this colour change. colour change: from to equation
See it on the paper → - 9701/41 · May/June 2026 · Q5e(i)[1]
Describe two observations that can be made about the contents of the conical flask after KI(aq) has been added to Cu(NO 3 ) 2 (aq). observation observation
See it on the paper → - 9701/41 · May/June 2026 · Q5e(ii)[1]
Name a suitable indicator for this titration and describe the colour change at the end- point of the titration. indicator colour change from to
See it on the paper → - 9701/41 · May/June 2026 · Q6a[2]
Explain what is meant by bidentate ligand.
See it on the paper → - 9701/41 · May/June 2026 · Q6b(i)[1]
State the formula and charge of this complex.
See it on the paper → - 9701/41 · May/June 2026 · Q7c(ii)[1]
Name the mechanism for this reaction. Turn over
See it on the paper → - 9701/41 · May/June 2026 · Q8a(iii)[1]
Compound L is an amide. Draw the structure of L in Figure 8.1.
See it on the paper → - 9701/41 · May/June 2026 · Q8a(iv)[1]
Draw the structure of the reagent added to CH 3 COCl in step 2.
See it on the paper → - 9701/41 · May/June 2026 · Q8a(v)[1]
Name the mechanism of the reaction forming L in step 2.
See it on the paper → - 9701/41 · May/June 2026 · Q9c(i)[2]
Draw the structure of W. The peptide functional groups formed should be displayed.
See it on the paper → - 9701/21 · October/November 2025 · Q3c(i)[1]
The reaction is initiated by the bond fission of Cl 2 . State the type of bond fission shown in the initiation step.
See it on the paper → - 9701/21 · October/November 2025 · Q3c(ii)[2]
Complete the equations to show the two propagation steps that follow the initiation step. propagation 1 C 5 H 10 + C 5 H 9 • +
See it on the paper → - 9701/21 · October/November 2025 · Q3d(i)[1]
Identify a suitable reagent for reaction 3.
See it on the paper → - 9701/22 · October/November 2025 · Q3e(i)[1]
Identify a suitable reagent for reaction 3.
See it on the paper → - 9701/22 · October/November 2025 · Q4a(i)[1]
Name the mechanism shown by reaction 1.
See it on the paper → - 9701/22 · October/November 2025 · Q4a(ii)[3]
Complete the mechanism for reaction 1. Construct equations to describe the steps of the mechanism. Cl 2 → 2Cl• initiation propagation propagation
See it on the paper → - 9701/23 · October/November 2025 · Q1e[2]
Chromium( IV ) fluoride, CrF 4 , is a covalent molecule that shows similar chemical properties to SiCl 4 . Construct a relevant equation for this reaction. type of reaction Suggest the type of reaction that occurs when CrF 4 is placed in water.
See it on the paper → - 9701/42 · October/November 2025 · Q5a(iii)[2]
An excess of concentrated HCl is added to a solution containing [Co(H 2 O) 6 ] 2+ . Describe the colour change observed and the state of the cobalt-containing product. The colour changes from to .
See it on the paper →
What examiners said
Many candidates stated it was simple molecular without any attempt at explanation of the information given in the question.
— Examiner report, February/March 2025, 9701/22 Q1(a)(iv) (Cambridge)
Many candidates did not answer the question by giving a name to the compound.
— Examiner report, February/March 2025, 9701/22 Q1(b)(iv) (Cambridge)
Candidates were able to identify the solvent but many omitted heat as a condition.
— Examiner report, February/March 2025, 9701/22 Q1(c)(ii) (Cambridge)
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