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HPCET Coordination Number — practice questions

Explore 5 free Coordination Number questions in HPCET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Coordination Number questions and exercises with answers

Showing questions 1–5 of 5.

The **coordination number** of the central metal in $[Co(NH_3)_4Cl_2]^+$ is:Read the answer and worked solution →**Coordination number** of a particle in a simple cubic (sc) lattice is:Read the answer and worked solution →**Coordination number** of a particle in a body-centred cubic (bcc) lattice is:Read the answer and worked solution →**Coordination number** of a particle in a face-centred cubic (fcc) lattice is:Read the answer and worked solution →**Hexagonal close-packed (hcp)** structure has coordination number:Read the answer and worked solution →

Worked practice questions

The **coordination number** of the central metal in $[Co(NH_3)_4Cl_2]^+$ is:

  1. 2
  2. 4
  3. 6
  4. 8
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Correct answer: C. 6

Four NH₃ (each monodentate) + two Cl⁻ (each monodentate) = 6 donor atoms attached to Co. Coordination number = 6 (octahedral geometry).

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**Coordination number** of a particle in a simple cubic (sc) lattice is:

  1. 4
  2. 6
  3. 8
  4. 12
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Correct answer: B. 6

In sc lattice, each particle touches 6 neighbours (one along each of ±x, ±y, ±z directions). Polonium is the only element with sc structure.

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**Coordination number** of a particle in a body-centred cubic (bcc) lattice is:

  1. 6
  2. 8
  3. 10
  4. 12
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Correct answer: B. 8

In bcc, the central particle touches all 8 corner particles of the cube ⇒ CN = 8.

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More Chemistry topics

Ideal and Non-Ideal SolutionsIdeal SolutionsNon-Ideal SolutionsReactions in Aqueous SolutionElectrochemistryElectrochemical SeriesCoordination CompoundsSolutions