Class 10 Chemistry Chapter 23 Test 5 PDF Download | Monohydroxy Alkanes | Punjab Board 2027
Grade 10 Chemistry Chapter 23 Monohydroxy Alkanes or Alcohols Test 5
Class 10 Chemistry Chapter 23 Test 5 PDF Download – Monohydroxy Alkanes 2027
Prepare for the Class 10 Chemistry Annual Examination 2027 with Chapter 23 Chemistry Test No. 5, covering Monohydroxy Alkanes or Alcohols. This chapter-wise Chemistry test paper is designed according to the new syllabus issued by PECTAA Punjab for the academic session 2026-27. It covers important textbook topics 23.1 to 23.2 and provides students with valuable practice material, including multiple-choice questions (MCQs), short questions and detailed questions. Students can use this Class 10 Chemistry Test 5 to revise important concepts and improve their preparation for the upcoming Punjab Board examinations.
🧪 Class 10 Chemistry Chapter 23 – Test No. 5
The 10th Class Chemistry Chapter 23 Test 5 is part of our Punjab Board 2027 Chapter Wise Test Series. This test focuses on Monohydroxy Alkanes, also known as Alcohols, and helps students understand important chemical concepts through examination-oriented questions. It is a useful resource for students who want to practise chapter-wise Chemistry tests according to the latest PECTAA syllabus.
- Class: 10th
- Subject: Chemistry
- Chapter: 23
- Chapter Name: Monohydroxy Alkanes or Alcohols
- Test Number: 5
- Topics: 23.1 to 23.2
- Academic Session: 2026-27
- Examination: Punjab Board Annual 2027
📚 Important Topics Covered in Test 5
This Class 10 Chemistry Chapter 23 Test covers important concepts related to Monohydroxy Alkanes and Alcohols. Students can revise the basic definitions, properties, preparation methods and important chemical reactions included in the prescribed topics.
- Introduction to Monohydroxy Alkanes
- General Formula of Alcohols
- Fermentation Process
- Preparation of Ethanol
- Conditions Required for Fermentation
- Hydration of Ethene
- Important Chemical Equations
- Uses and Properties of Alcohols
📝 Objective and Subjective Chemistry Questions
The Class 10 Chemistry Test 5 PDF includes objective and subjective questions to support comprehensive examination preparation. The objective section helps students practise MCQs, while the subjective section provides opportunities to prepare short and detailed answers from important textbook topics.
- Multiple Choice Questions (MCQs)
- Important Short Questions
- Chemical Definitions and Equations
- Conceptual Questions
- Detailed and Descriptive Questions
- Board Examination-Style Practice
🎯 Why Practise Class 10 Chemistry Chapter Wise Tests?
Regular practice of Class 10 Chemistry Chapter Wise Test Papers 2027 helps students strengthen their understanding of important concepts and prepare systematically for examinations. These tests also help students identify topics that need further revision and improve their ability to attempt objective and subjective questions within the given time.
Teachers can also use these Chemistry test papers for classroom assessments, weekly tests, homework assignments and chapter-wise student evaluation.
📖 Class 10 Chemistry Punjab Board 2027 Test Series
Explore the complete Class 10 Chemistry Chapter 23 Test Series on 786Times.com. Our chapter-wise Chemistry tests are intended to provide structured practice according to the new syllabus issued by PECTAA Punjab. Students can use individual class tests and full chapter tests for revision and self-assessment before their annual examinations.
📥 Download Class 10 Chemistry Chapter 23 Test 5 PDF
Students and teachers can access the Class 10 Chemistry Chapter 23 Test 5 PDF using the button below. Visit the test paper page to view the complete paper and access the available study material for Monohydroxy Alkanes or Alcohols.
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Prepare for your exams with the Class 10 Chemistry Chapter 23 Class Test 5, covering Monohydroxy Alkanes or Alcohols (Topics 23.1 to 23.2) from the textbook. This chapter-wise test is part of the Punjab Board 2027 Model Papers, prepared according to the new syllabus issued by PECTAA Punjab. Students can use this Class 10 Chemistry test to revise important concepts, assess their preparation, and practise for upcoming board examinations. Explore our Chapter Wise Test Series for effective exam preparation and download the test PDF when available.
- (i)Define monohydroxy alkane.Monohydroxy alkanes (alcohols) are compounds obtained by replacing one hydrogen atom of an alkane with one hydroxyl (–OH) group. General formula: CnH2n+1OH. Example: CH3CH2OH.
- (ii)What is Fermentation? Give example.Fermentation is the slow decomposition of organic compounds such as sugar and starch by the enzymes of micro-organisms (yeast), giving ethanol and carbon dioxide.
C6H12O6 Zymase 2C2H5OH + 2CO2 - (iii)Write the any critical condition of Fermentation process.Absence of air (oxygen). In the presence of oxygen the ethanol is oxidised to ethanoic acid (vinegar). The temperature must also be kept at about 35°C.
- (iv)Why hydration of ethene is an important industrial process?It is a fast, continuous process that gives pure ethanol on a large scale. Ethanol is needed as a solvent, fuel and raw material for many chemicals.
- (v)Write any two comparison of hydration of ethene and fermentation process?
- Hydration is fast and continuous; fermentation is slow and takes days.
- Hydration gives pure ethanol from non-renewable ethene; fermentation gives dilute, impure ethanol from renewable sugar.
- (vi)Write any two advantages of alcohols used as full.
- Burn cleanly with less pollution (no sulphur oxides and little smoke).
- Renewable, since they are made from plants, and they can be blended with petrol.
- (vii)At which temperature enzymes present in yeast get inactive?Above about 45°C the enzymes of yeast are destroyed (denatured) and fermentation stops.
- (viii)Why oxygen excluded when the fermentation reaction is carried out?If oxygen is present, the ethanol formed is oxidised to ethanoic acid (vinegar) by bacteria, so the yield of ethanol is lost.
- (ix)Why does butanol evolve a highter amount of heat than propanol when burn in oxygen.Butanol has one more CH2 group (more carbon and hydrogen atoms), so on burning it forms more CO2 and H2O molecules, with more strong C=O and O–H bonds. Each extra CH2 gives about 650 kJ/mol more heat (propanol 2017, butanol 2676 kJ/mol).
Invertase converts sucrose to glucose and fructose:
C12H22O11 + H2O Invertase C6H12O6 + C6H12O6
Zymase then converts glucose to ethanol:
C6H12O6 Zymase 2C2H5OH + 2CO2
When ethanol reaches about 14%, the yeast stops working. The ethanol is separated by fractional distillation (about 95% pure, rectified spirit).
CH2=CH2 + H2O H3PO4 CH3CH2OH
The reaction is reversible, so only a small part reacts in one pass; the unreacted ethene is recycled. It is a fast, continuous process that gives pure ethanol, but it uses ethene from petroleum, a non-renewable source.
