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National Institute of Open Schooling (NIOS)
Class XII
Chemistry (313)
Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) (Set 02 (Advanced Level))

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National Institute of Open Schooling (NIOS) Class XII Chemistry (313) Set 02 (Advanced Level) English Medium 100% Free Practice Test

National Institute of Open Schooling (NIOS) Class XII Chemistry (313): Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) Online Test (Set 02 (Advanced Level)) | TargetExams

Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) — Set 02 (Advanced Level)

Take free online mock test for National Institute of Open Schooling (NIOS) Class XII Chemistry (313) chapter 'Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes)'. 20 MCQs, 20 minutes, detailed solutions & score analysis.

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Instant Scorecard Step-by-Step Solutions NIOS Self-Learning Material (SLM) Pattern

Chapter Study Guide & In-Depth Notes

Master the key concepts, vocabulary, and high-yield questions before starting the test.

3 Sections

Chapter Overview & Core Concepts: Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes)

Class 12 Study Guide

Mastering Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) in Class 12 provides critical subject intuition, analytical skills, and examination readiness.

Examinations test fundamental principles, definitions, cause-and-effect reasoning, and real-world applications under timed conditions.

Core Moral & Key Takeaway:

Grasping core concepts and practicing with timed chapter-wise CBT tests guarantees top performance in board exams.

Key Terminology, Definitions & Principles

Glossary & Concepts

Term / Formula	Type	Definition / Meaning	Explanation / Notes	Example / Usage
Core Concept	Principle	Primary concept governing Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes).	मुख्य सिद्धांत	"Understand and apply the principle accurately."
Analytical Deduction	Skill	Evaluating evidence to draw correct conclusions.	तार्किक विश्लेषण	"Examine question clues systematically."

Key Features & Devices Explored:

Systematic Elimination

Eliminate distractor choices before selecting the best answer.

Pacing & Accuracy

Complete each question within 60 seconds to maintain steady momentum.

High-Yield Revision Points & Solved Board Exam Q&A

Revision Notes

⚡ High-Yield Exam Takeaways:

Review all key textbook terms, definitions, and formulas.
Pay attention to units, boundary values, and key keywords in questions.
Solve Foundation Set 01 to build confidence, followed by Advanced Set 02 for exam excellence.

Frequently Asked Questions & Model Answers:

Q1 How should students prepare for Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) exams?

Answer: Read the chapter thoroughly, practice step-by-step solved examples, memorize key definitions, and evaluate preparation using timed online CBT mock tests.

Sample Questions Preview

Free Sneak Peek

Here is a sneak peek of the questions included in this test set. Test your preparation by viewing the answer and detailed explanation before starting the timed exam.

Consider the boiling points of isomeric butyl bromides: 1-bromobutane ($375\text{ K}$), 2-bromobutane ($364\text{ K}$), 1-bromo-2-methylpropane ($364\text{ K}$), and 2-bromo-2-methylpropane ($346\text{ K}$). What is the primary physical reason why boiling point decreases with increased branching in isomeric haloalkanes?

समावयवी ब्यूटिल ब्रोमाइडों के क्वथनांकों पर विचार कीजिए: 1-ब्रोमोब्यूटेन ($375\text{ K}$), 2-ब्रोमोब्यूटेन ($364\text{ K}$), 1-ब्रोमो-2-मेथिलप्रोपेन ($364\text{ K}$), तथा 2-ब्रोमो-2-मेथिलप्रोपेन ($346\text{ K}$)। समावयवी हैलोऐल्केनों में शाखन (branching) बढ़ने के साथ क्वथनांक घटने का प्राथमिक भौतिक कारण क्या है?

Branching makes the molecule more spherical, decreasing the total surface area and consequently weakening intermolecular van der Waals forcesशाखन अणु को अधिक गोलाकार (spherical) बना देता है, जिससे कुल पृष्ठीय क्षेत्रफल कम हो जाता है और परिणामस्वरूप अंतराणुक वाण्डर वाल्स बल कमजोर हो जाते हैं

Branching drastically increases the ionic character and dipole moment of the carbon-bromine bondशाखन कार्बन-ब्रोमीन बंध के आयनिक लक्षण और द्विध्रुव आघूर्ण को अत्यधिक बढ़ा देता है

Tertiary isomers undergo rapid spontaneous unimolecular elimination at room temperatureतृतीयक समावयवी कमरे के तापमान पर तेजी से स्वतः एक-अणुक विलोपन से गुजरते हैं

Linear isomers form strong intermolecular hydrogen bonds that are completely absent in branched isomersरैखिक समावयवी मजबूत अंतराणुक हाइड्रोजन बंध बनाते हैं जो शाखित समावयवियों में पूरी तरह से अनुपस्थित होते हैं

Correct Answer: Option A

Explanation:

According to NCERT, boiling points of alkyl halides are determined by intermolecular van der Waals forces of attraction. As branching increases, the molecule approaches a spherical shape, which minimizes surface area of contact. Smaller surface area leads to weaker van der Waals attractions. Therefore, boiling point decreases in the order: 1-bromobutane ($375\text{ K}$) > 2-bromobutane / 1-bromo-2-methylpropane ($364\text{ K}$) > 2-bromo-2-methylpropane ($346\text{ K}$).

NCERT के अनुसार, ऐल्किल हैलाइडों के क्वथनांक अंतराणुक वाण्डर वाल्स आकर्षण बलों द्वारा निर्धारित होते हैं। जैसे-जैसे शाखन बढ़ता है, अणु गोलाकार आकृति ग्रहण करने लगता है, जिससे संपर्क का पृष्ठीय क्षेत्रफल न्यूनतम हो जाता है। कम पृष्ठीय क्षेत्रफल के कारण वाण्डर वाल्स आकर्षण बल कमजोर हो जाते हैं। अतः क्वथनांक का क्रम घटता है: 1-ब्रोमोब्यूटेन ($375\text{ K}$) > 2-ब्रोमोब्यूटेन / 1-ब्रोमो-2-मेथिलप्रोपेन ($364\text{ K}$) > 2-ब्रोमो-2-मेथिलप्रोपेन ($346\text{ K}$)।

For a given alkyl group ($R$), what is the correct decreasing order of boiling points among haloalkanes, and what governs this trend?

दिए गए ऐल्किल समूह ($R$) के लिए, हैलोऐल्केनों के क्वथनांकों का सही घटता क्रम क्या है, और यह प्रवृत्ति किसके द्वारा नियंत्रित होती है?

$R-F > R-Cl > R-Br > R-I$, governed by decreasing electronegativity of the halogen atom$R-F > R-Cl > R-Br > R-I$, जो हैलोजन परमाणु की घटती विद्युत ऋणात्मकता द्वारा नियंत्रित होता है

$R-I > R-Br > R-Cl > R-F$, governed by increasing size and atomic mass of the halogen atom leading to stronger London dispersion forces$R-I > R-Br > R-Cl > R-F$, जो हैलोजन परमाणु के बढ़ते आकार और परमाणु द्रव्यमान द्वारा नियंत्रित होता है जिससे लंदन परिक्षेपण बल अधिक प्रबल होते हैं

$R-Cl > R-F > R-Br > R-I$, governed strictly by the dipole moment magnitude of the $C-X$ bond$R-Cl > R-F > R-Br > R-I$, जो पूरी तरह से $C-X$ बंध के द्विध्रुव आघूर्ण के परिमाण द्वारा नियंत्रित होता है

$R-I > R-F > R-Br > R-Cl$, governed by hyperconjugation between halogen lone pairs and the alkyl chain$R-I > R-F > R-Br > R-Cl$, जो हैलोजन के एकाकी युग्मों और ऐल्किल श्रृंखला के बीच अतिसंयुग्मन द्वारा नियंत्रित होता है

Correct Answer: Option B

Explanation:

For a given alkyl group, the boiling points of alkyl halides decrease in the order: $R-I > R-Br > R-Cl > R-F$. This is because with the increase in size and mass of halogen atom, the magnitude of polarizability and van der Waals (London dispersion) forces increases significantly, requiring more thermal energy to separate the molecules into the vapor phase.

किसी दिए गए ऐल्किल समूह के लिए, ऐल्किल हैलाइडों के क्वथनांक इस क्रम में घटते हैं: $R-I > R-Br > R-Cl > R-F$। ऐसा इसलिए है क्योंकि हैलोजन परमाणु के आकार और द्रव्यमान में वृद्धि के साथ, ध्रुवणता और वाण्डर वाल्स (लंदन परिक्षेपण) बलों का परिमाण काफी बढ़ जाता है, जिससे अणुओं को वाष्प अवस्था में अलग करने के लिए अधिक तापीय ऊर्जा की आवश्यकता होती है।

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समय प्रबंधन एवं गति नियंत्रण

In school examinations, students write answers without active pacing. In national entrance tests, students have barely 45-60 seconds per MCQ. Practicing with a 20-minute timer instills instinctive time-budgeting and prevents last-minute exam panic.

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Immunity to Negative Marking

सटीकता और नकारात्मक अंकन से सुरक्षा

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Syllabus Concepts Evaluated in this Chapter

This test series specifically evaluates the core competencies and learning objectives outlined in the official syllabus:

Core definitions, fundamental theorems, and essential concepts of this chapter.
Step-by-step mathematical reasoning and deductive problem-solving.
Application of standard formulas and operations in real-world scenarios.
Critical examination of common exam pitfalls and misleading options.
Higher-order thinking skill (HOTS) questions to prepare for school examinations.
Speed and accuracy mastery under standard timed CBT exam conditions.

Exam Rules & Test Taking Guidelines

Total Questions: The test consists of exactly 20 objective type questions.
Time Allowed: 20 Minutes countdown timer begins as soon as the test launches.
Marking Scheme: +1.0 mark is awarded for each correct answer.
Zero Penalty: There is 0.0 negative marking for incorrect or unattempted questions.
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Review & Solutions: Access instant scorecard and full step-by-step solutions upon submission.

Frequently Asked Questions (FAQs)

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Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) (Set 02 (Advanced Level))

20 MCQs • 20 Mins • 100% Free Practice Test

National Institute of Open Schooling (NIOS) Class XII Chemistry (313): Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes) Online Test (Set 02 (Advanced Level)) | TargetExams

Chapter Study Guide & In-Depth Notes

Chapter Overview & Core Concepts: Compounds of Carbon Containing Halogens (Haloalkanes and Haloarenes)