NEET UG Organic: Functional Groups: Alcohols, Phenols and Ethers – Chapter Test
NEET UG Organic: Functional Groups: Alcohols, Phenols and Ethers – Chapter Test is an online chapter test in the NEET UG pattern, covering Organic: Functional Groups. Attempt it on SeatBeat with a timer like the real exam, then see a detailed solution for every question and your score and weak-topic analysis.
Topics in this test
| Topic | Questions |
|---|---|
| Organic: Functional Groups | 20 |
Difficulty: 10 medium · 10 hard
Alcohols, Phenols and Ethers MCQ questions with answers
The first 3 of 20 questions. Unlock the series for the rest, each with a solution.
Q1. Which class of alcohol does NOT give turbidity with Lucas reagent at room temperature and reacts only on heating?
कौन-सा ऐल्कोहॉल वर्ग कक्ष ताप पर लूकास अभिकर्मक के साथ धुंधलापन (टर्बिडिटी) नहीं देता और केवल गर्म करने पर अभिक्रिया करता है?
- A. Tertiary alcohol / तृतीयक ऐल्कोहॉल
- B. Allylic alcohol / ऐलिलिक ऐल्कोहॉल
- C. Secondary alcohol / द्वितीयक ऐल्कोहॉल
- D. Primary alcohol / प्राथमिक ऐल्कोहॉल
Solution
Primary alcohols form the least stable (primary) carbocation, so they do not react at room temperature and give cloudiness only on heating; tertiary give it immediately and secondary within a few minutes.
प्राथमिक ऐल्कोहॉल सबसे कम स्थायी (प्राथमिक) कार्बोकैटायन बनाते हैं, इसलिए वे कक्ष ताप पर अभिक्रिया नहीं करते और केवल गर्म करने पर धुंधलापन देते हैं; तृतीयक तुरंत देते हैं और द्वितीयक कुछ मिनटों में।
Q2. When phenol is treated with carbon tetrachloride (CCl4) and aqueous NaOH under Reimer-Tiemann conditions, followed by acidification, the product obtained is mainly:
जब फीनॉल को राइमर-टीमैन परिस्थितियों के अंतर्गत कार्बन टेट्राक्लोराइड (CCl4) और जलीय NaOH के साथ उपचारित किया जाता है, तत्पश्चात अम्लीकरण किया जाता है, तो प्राप्त उत्पाद मुख्यतः है:
- A. o-Cresol / o-क्रेसॉल
- B. Benzoic acid / बेन्जोइक अम्ल
- C. Salicylic acid / सैलिसिलिक अम्ल
- D. Salicylaldehyde / सैलिसिलैल्डिहाइड
Solution
Using CCl4 in place of CHCl3 generates an intermediate that, on hydrolysis, gives a carboxyl group rather than an aldehyde, so the product is salicylic acid (2-hydroxybenzoic acid) instead of salicylaldehyde.
CHCl3 के स्थान पर CCl4 का उपयोग एक ऐसा मध्यवर्ती उत्पन्न करता है जो जल-अपघटन पर ऐल्डिहाइड के बजाय कार्बोक्सिल समूह देता है, अतः उत्पाद सैलिसिलैल्डिहाइड के बजाय सैलिसिलिक अम्ल (2-हाइड्रॉक्सीबेन्जोइक अम्ल) है।
Q3. Arrange ethanol, propan-2-ol and 2-methylpropan-2-ol in the correct decreasing order of their acidic strength in aqueous solution:
एथेनॉल, प्रोपेन-2-ऑल और 2-मेथिलप्रोपेन-2-ऑल को जलीय विलयन में उनकी अम्लीय प्रबलता के सही घटते क्रम में व्यवस्थित कीजिए:
- A. Ethanol > propan-2-ol > 2-methylpropan-2-ol / एथेनॉल > प्रोपेन-2-ऑल > 2-मेथिलप्रोपेन-2-ऑल
- B. Propan-2-ol > ethanol > 2-methylpropan-2-ol / प्रोपेन-2-ऑल > एथेनॉल > 2-मेथिलप्रोपेन-2-ऑल
- C. Ethanol > 2-methylpropan-2-ol > propan-2-ol / एथेनॉल > 2-मेथिलप्रोपेन-2-ऑल > प्रोपेन-2-ऑल
- D. 2-Methylpropan-2-ol > propan-2-ol > ethanol / 2-मेथिलप्रोपेन-2-ऑल > प्रोपेन-2-ऑल > एथेनॉल
Solution
Electron-releasing alkyl groups destabilise the alkoxide ion, so acidity falls as alkyl substitution increases: primary (ethanol) > secondary (propan-2-ol) > tertiary (2-methylpropan-2-ol).
इलेक्ट्रॉन-विमोचक ऐल्किल समूह ऐल्कॉक्साइड आयन को अस्थायी करते हैं, अतः ऐल्किल प्रतिस्थापन बढ़ने के साथ अम्लता घटती है: प्राथमिक (एथेनॉल) > द्वितीयक (प्रोपेन-2-ऑल) > तृतीयक (2-मेथिलप्रोपेन-2-ऑल)।
Frequently asked questions
How many questions are in the NEET UG Organic: Functional Groups: Alcohols, Phenols and Ethers – Chapter Test?
20 questions for 20 marks, to be answered in 20 minutes.
Is there negative marking in the NEET UG Organic: Functional Groups: Alcohols, Phenols and Ethers – Chapter Test?
Yes — 0.25 marks are deducted for each wrong answer, as in the real exam pattern.
Which topics does the NEET UG Organic: Functional Groups: Alcohols, Phenols and Ethers – Chapter Test cover?
Organic: Functional Groups (20 questions).
Is the NEET UG Organic: Functional Groups: Alcohols, Phenols and Ethers – Chapter Test free?
It is part of the NEET UG 2027 Mock Test Series (134 tests, ₹299). You can first try Biology in Human Welfare – Topic Test for free.
More tests in the NEET UG 2027 Mock Test Series
- Biology in Human Welfare – Topic TestFree
- Cell Biology – Topic Test
- Diversity in the Living World – Topic Test
- Ecology – Topic Test
- Genetics – Topic Test
- Plant Physiology – Topic Test
- Plant Reproduction – Topic Test
- Structural Organisation in Plants – Topic Test
- Basic Concepts & Atomic Structure – Topic Test
- Biomolecules – Topic Test
- Inorganic: p/d/f Block & Coordination – Topic Test
- Organic: Basics & Hydrocarbons – Topic Test
- Organic: Functional Groups – Topic Test
- Periodicity & Chemical Bonding – Topic Test
- Solutions, Electrochemistry & Kinetics – Topic Test
- Thermodynamics & Equilibrium – Topic Test
- Electrostatics & Current Electricity – Topic Test
- Laws of Motion & Work-Energy – Topic Test
- Magnetism, EMI & AC – Topic Test
- Mechanics: Measurement & Kinematics – Topic Test
- Modern Physics & Electronics – Topic Test
- Optics – Topic Test
- Oscillations and Waves – Topic Test
- Properties of Matter & Heat – Topic Test
- Rotational Motion & Gravitation – Topic Test
- Animal Diversity – Topic Test
- Biomolecules & Cell Chemistry – Topic Test
- Biotechnology – Topic Test
- Evolution – Topic Test
- Human Physiology I: Nutrition, Respiration & Circulation – Topic Test
See the full NEET UG 2027 Mock Test Series → · NEET UG: pattern, notification & syllabus →