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JKCET Classification — practice questions

Explore 4 free Classification questions in JKCET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Classification questions and exercises with answers

Showing questions 1–4 of 4.

Which of the following is a **homoleptic** complex?Read the answer and worked solution →In an **alkyl halide (haloalkane)**, the halogen is bonded to a:Read the answer and worked solution →An **allylic halide** has the halogen bonded to:Read the answer and worked solution →**Glycerol** (propane-1,2,3-triol) is classified as:Read the answer and worked solution →

Worked practice questions

Which of the following is a **homoleptic** complex?

  1. $[Co(NH_3)_4Cl_2]^+$
  2. $[Pt(NH_3)_2Cl_2]$
  3. $[Co(NH_3)_6]^{3+}$
  4. $[Co(NH_3)_3Cl_3]$
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Correct answer: C. $[Co(NH_3)_6]^{3+}$

Homoleptic = all ligands of one type. $[Co(NH_3)_6]^{3+}$ has only NH₃ ligands. The others have a mix (NH₃ + Cl), making them **heteroleptic**.

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In an **alkyl halide (haloalkane)**, the halogen is bonded to a:

  1. sp³-hybridised carbon (saturated)
  2. sp²-hybridised carbon (double-bond carbon)
  3. sp-hybridised carbon (triple-bond carbon)
  4. Aromatic ring carbon
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Correct answer: A. sp³-hybridised carbon (saturated)

Alkyl halides have X bonded to sp³ C in a saturated chain. Vinyl halides (sp²), haloalkynes (sp), and aryl halides (aromatic sp²) are different categories with very different reactivity.

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An **allylic halide** has the halogen bonded to:

  1. A carbon directly part of C=C double bond
  2. A sp³ carbon adjacent to (next to) a C=C double bond
  3. An aromatic carbon
  4. A sp carbon
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Correct answer: B. A sp³ carbon adjacent to (next to) a C=C double bond

Allylic position = the sp³ carbon NEXT to a double bond. **Example:** CH₂=CH-CH₂-X. Different from vinyl halides where X is ON the double-bond carbon (CH₂=CH-X).

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More Chemistry topics

Ideal and Non-Ideal SolutionsIdeal SolutionsNon-Ideal SolutionsReactions in Aqueous SolutionElectrochemistryElectrochemical SeriesSolutionsCoordination Compounds