Neco 2022 Chemistry Question 3

Practice essay / theory question 3 from the 2022 Neco Chemistry examination. This question covers Chemical Bonding .

Neco 2022 Chemistry Essay / Theory

Topic: Chemical Bonding

Question 3 NECO • 2022 • CHEMISTRY • essay

Answer the following questions on chemical bonding.

Question Parts

( a )

Explain, with reference to electron configuration, why sodium chloride (NaCl) forms an ionic bond. Include in your answer the processes that occur when the solid lattice is formed and relate these processes to the physical properties of NaCl.

( b )

Carbon dioxide (CO₂) is a common molecular compound. State the type of bond(s) present, describe its molecular geometry and explain why CO₂ is a non‑polar molecule despite containing polar C=O bonds.

( c )

Using the average bond enthalpies given below, calculate the enthalpy change (ΔH) for the reaction: \(\mathrm{H_2(g) + Cl_2(g) \rightarrow 2\,HCl(g)}\). Show all steps. Average bond enthalpies (kJ mol⁻¹): - H–H : 436 - Cl–Cl : 243 - H–Cl : 431

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About This Question

This is Neco 2022 Chemistry Question 3. It is one of the essay questions from the 2022 Neco Chemistry examination.

The question covers Chemical Bonding .

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