mMCQ.

Navigation Menu

Step into mMCQ.

Launch mMCQ. diagnostic

Explore mMCQ.

MDCAT prepFree DiagnosticPricing & SubscribeSign in

Resources

Terms & Conditions

mMCQ.

© 2021 - 2025 mMCQ.All rights reserved.

WhatsApp
  1. Home
  2. MDCAT
  3. Chemistry
  4. Hydrocarbons
MDCAT
Chemistry
2025

Chemistry · Hydrocarbons

Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive practice and topic analytics.

Question

The structure of four Chloroalkanes W X, Y and Z are shown:

(CH₃)₂CHCH(Cl)CH₃  W

CH2(Cl)CH3      X

(CH₃)3CHCH₂Cl     Y

(CH₃)₂CHC(CH₃)₂Cl    Z

Select the Chloroalkane classified as tertiary

Options
  • A

    W only

  • B

    X only

  • C

    Y only

  • D

    Z only

Explanation

The correct answer is Z only. In Z, the carbon atom that carries the chlorine is attached to three other carbon atoms, making it a tertiary carbon. In contrast, W and Y are secondary chloroalkanes, as their chlorine-bearing carbon atoms are attached to two other carbon atoms. X is a primary chloroalkane, where the chlorine atom is attached to a carbon connected to only one other carbon atom. Understanding the classification of carbon atoms based on their bonding is crucial for solving this question.

W is a secondary chloroalkane, as the chlorine atom is attached to a carbon that is connected to two other carbon atoms.

X is a primary chloroalkane, as the chlorine atom is attached to a carbon that is connected to only one other carbon atom.

Y is a secondary chloroalkane, as the chlorine atom is attached to a carbon that is connected to two other carbon atoms.

Z is a tertiary chloroalkane, as the chlorine atom is attached to a carbon that is connected to three other carbon atoms.

Keep practising Chemistry

Take the free 2 minutes diagnostic to map weak topics, then unlock full Biology, Chemistry, Physics, English, and Logical Reasoning practice for PKR 15,000/month.

Start free diagnosticExplore MDCAT

Tagged under Chemistry · Hydrocarbons · 2025