Relevant Titles
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Purification of Organic Compounds Class 11 Chemistry MCQs with Answers
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CBSE Class 11 Chemistry Online Test – Purification Techniques MCQs
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Important NCERT-Based Questions on Purification of Organic Compounds
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CBSE Class 11 Organic Chemistry Quiz – Purification and Separation Methods
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Class 11 Chemistry MCQs: Purification of Organic Compounds Practice Test
Introduction Paragraph
Master the fundamental concepts of Purification of Organic Compounds with this exclusive set of CBSE Class 11 Chemistry MCQs, designed strictly according to the NCERT syllabus. This topic from Chapter 12: Organic Chemistry – Some Basic Principles and Techniques focuses on various techniques used to separate, identify, and purify organic substances.
In this online practice test, students can test their understanding of key methods such as crystallization, distillation, sublimation, chromatography, extraction, and drying techniques. Each multiple-choice question is carefully designed to strengthen conceptual clarity, provide instant feedback, and prepare learners for board-level and competitive exams.
These MCQs are ideal for CBSE Class 11 board exam preparation and are equally useful for NEET, JEE, and other entrance exams. Practice now to boost your knowledge of organic compound purification techniques, enhance your problem-solving skills, and achieve excellence in chemistry.
Sample MCQs (with Answers and Explanations):
Q1. Which method is used to separate a volatile liquid from non-volatile impurities?
A) Sublimation B) Simple distillation C) Recrystallization D) Chromatography
✅ Answer: B) Simple distillation
💡 Explanation: Simple distillation separates a volatile liquid from non-volatile solids based on their boiling point difference.
Q2. Which purification method is used for heat-sensitive, high-boiling organic compounds?
A) Vacuum distillation B) Sublimation C) Extraction D) Filtration
✅ Answer: A) Vacuum distillation
💡 Explanation: Vacuum distillation lowers boiling points under reduced pressure, preventing decomposition of heat-sensitive compounds.
Q3. Which technique separates immiscible liquids like oil and water?
A) Filtration B) Chromatography C) Separating funnel D) Distillation
✅ Answer: C) Separating funnel
💡 Explanation: Immiscible liquids are separated based on density difference using a separating funnel.
Q4. What is the role of activated charcoal in purification?
A) It removes colour impurities B) It changes pH C) It oxidizes organic compounds D) It increases solubility
✅ Answer: A) It removes colour impurities
💡 Explanation: Activated charcoal adsorbs coloured impurities during purification processes like recrystallization.
Q5. The ratio of distance moved by a solute to that by solvent in paper chromatography is called:
A) Boiling point B) Solubility constant C) Retention factor (R<sub>f</sub>) D) Partition coefficient
✅ Answer: C) Retention factor (R<sub>f</sub>)
💡 Explanation: R<sub>f</sub> = (Distance moved by solute) / (Distance moved by solvent front), used to identify compounds chromatographically.