Neco Model Questions Vol1 2024 Chemistry Question 47

Practice objective / multiple choice question 47 from the 2024 Neco Model Questions Vol1 Chemistry examination.

Neco Model Questions Vol1 2024 Chemistry Objective / Multiple Choice Medium Difficulty
Question 47 NECO_MODEL_QUESTIONS_VOL1 • 2024 • CHEMISTRY • objective

The compound \(\mathrm{C_2H_4Cl_2}\) exists as two possible structural isomers: 1,1‑dichloroethane and 1,2‑dichloroethane. The measured dipole moment of a sample is \(2.0\ \text{D}\). Given that the dipole moments are approximately \(1.9\ \text{D}\) for 1,1‑dichloroethane and \(0.0\ \text{D}\) for the trans‑1,2‑isomer (the gauche form is about \(1.5\ \text{D}\)), identify which isomer is present. Also state the hybridisation of the carbon atoms and the approximate H‑C‑H bond angle.

Answer Options

Correct Answer A. 1,1‑dichloroethane; carbon atoms are \(sp³\) hybridised; H‑C‑H angle ≈ 109.5°
B. 1,1‑dichloroethane; carbon atoms are \(sp³\) hybridised; H‑C‑H angle ≈ 104.5°
C. 1,1‑dichloroethane; carbon atoms are \(sp²\) hybridised; H‑C‑H angle ≈ 120°
D. 1,2‑dichloroethane; carbon atoms are \(sp³\) hybridised; H‑C‑H angle ≈ 109.5°
Correct Answer
A
Correct Option:
1,1‑dichloroethane; carbon atoms are \(sp³\) hybridised; H‑C‑H angle ≈ 109.5°

About This Question

This is Neco Model Questions Vol1 2024 Chemistry Question 47. It is one of the objective questions from the 2024 Neco Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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