Class 12 Chemistry Alcohols Notes and Important Questions
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Notes for Class 12 Alcohols (Chemistry) are shown above.
Practice
Important Questions
An organic compound (X) reacts with Grignard’s reagent to give (Y), which on oxidation gives (Z). All of the compounds (X), (Y) and (Z) give a positive iodoform test.
Identify the compounds (X), (Y) and (Z) with reactions and conditions involved.
Why do these compounds give a positive iodoform test?
How would you convert compound (Y) into pseudonitrol?
Write any two methods for the preparation of compound (Z).
Write down the structural formula and IUPAC name of tertiary alcohol with formula . How would you apply Victor Meyer’s method for the distinction of 1-propanol and 2-propanol? Explain.
How many isomeric alcohols are formed from propanol?
2
3
4
5
List of organic compounds are as follows:
A: C₂H₆O = CH₃CH₂OH (Ethanol)
B: C₂H₅Cl = CH₃CH₂Cl (Chloroethane)
C: C₂H₄O₂ = CH₃COOH (Ethanoic acid)
D: C₂H₄O = CH₃CHO (Ethanal)
E: C₄H₁₀O = CH₃CH₂–O–CH₂CH₃ (Diethyl ether)
How can you convert A to B if compound A responds positive iodoform test?
How is D obtained from A?
Make a sequence of reaction to convert A into C.
What happens when E is treated with O₂ in presence of sunlight?
Write down the isomeric alcohols of C₃H₈O and their IUPAC name. How would you apply Victor Meyer’s test to distinguish these isomers?
Oxygen containing organic compounds upon oxidation forms a carboxylic acid as the major organic product with its molecular mass higher by 14 units. Identify the organic compound.
A primary alcohol
An aldehyde
A ketone
A secondary alcohol
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Exam
Past Question Analysis
Historical exam-pattern data from past NEB question papers — not a prediction of future questions.
1
Question Items
2
Total Marks
1
Papers Appeared In
| Year | Question Items | Marks |
|---|---|---|
| 2082 | 1 | 2 |
Also appears in 6 model questions (not counted above — model sets aren't actual NEB exam history).
Alcohols explores the structure, classification, preparation and properties of monohydric alcohols. Students learn different preparation methods and reactions involving alcohols, including oxidation, dehydration, esterification and reactions with reactive metals. Industrial preparation and common types of alcohol are also discussed.
This page covers Alcohols, chapter 11 of 22 in the Class 12 Chemistry syllabus set by the National Examination Board (NEB). 6 important questions for this chapter are available, each with a full solution.
For numerical and derivation-based chapters like this one, working through past NEB questions is usually more useful than re-reading notes alone — try solving each important question above before checking the solution, then compare your working step by step.