Alcohols - ISC Class 12 Chemistry Questions with Answers
39 past-paper questions on Alcohols from ISC Class 12 Chemistry papers (2027-2018), newest first. Open one to see its answer.
- The hydroxy derivatives of aliphatic hydrocarbons are called alcohols. Ethanol is perhaps the most important aliphatic alcohol… 2027 · 3 marks · Case based
- How will the following be converted? (Give chemical equations) Diethyl ether from sodium ethoxide Propan-2-ol from Grignard’s… 2027 · 3 marks · Short answer
- Answer the following: Compounds [X] and [Y] are functional isomers of each other with molecular formula… 2027 · 3 marks · Short answer
- Primary, secondary and tertiary alcohols can be distinguished with the help of Lucas reagent. 2026 · 1 mark · Assertion-reason
- Choose the appropriate word(s) from the bracket [first, alc. AgCN, primary, decrease, third, increase, zero, Lucas, alc. KCN… 2026 · 1 mark · Fill in
- How will you convert the following? (Write chemical equations) Phenol from benzene sulphonic acid Ethyl alcohol from ethylamine… 2026 · 3 marks · Short answer
- Write chemical equations to convert each of the following: Methanol to ethanol Benzene diazonium chloride to phenol Sodium… 2026 · 3 marks · Short answer
- An organic compound [A] having molecular formula $\text{C}_3\text{H}_8\text{O}$ gives turbidity with Lucas reagent within five… 2026 · 2 marks · Short answer
- Write chemical equations to convert each of the following: Propan-1-ol to propyl cyanide Sodium methoxide to dimethyl ether… 2026 · 3 marks · Short answer
- Write chemical equations to convert each of the following: Methyl magnesium bromide to propan-2-ol Phenol to benzene 2026 · 2 marks · Short answer
- Write chemical tests to distinguish between the following pairs of compounds: 2-methylpropan-2-ol and propan-2-ol Ethanol and… 2025 · 2 marks · Short answer
- Answer the following: Arrange the following in the increasing order of their Acidic strength… 2025 · 2 marks · Short answer
- Alcohol and phenols are hydroxy derivatives of hydrocarbons. Both have the tendency to form intermolecular hydrogen bonding… 2025 · 3 marks · Short answer
- Ethanol is less acidic than water. 2025 · 1 mark · Assertion-reason
- An organic compound [A] reacts with $\text{PBr}_3$ and forms compound [B] which reacts with magnesium in presence of ether and… 2025 · 2 marks · Short answer
- Write the chemical test to distinguish between the following pairs of compounds. Propan-1-ol and Propan-2-ol Phenol and ethanol 2025 · 2 marks · Short answer
- Answer the following: What is meant by hydroboration –oxidation reaction? Explain with an equation to show the final product… 2025 · 2 marks · Short answer
- For the reaction: What are X and R respectively in the given reaction? 2025 · 1 mark · MCQ
- The boiling point (b.p.) of methyl amine, ethane and methanol is 265K, 185K and 333K respectively. How can one account for these… 2025 · 2 marks · Short answer
- Give a chemical test to distinguish between the following pairs of compounds. Ethanol and methanol Ethanol and Ethanal… 2024 · 3 marks · Short answer
- Explain the mechanism of acid catalysed dehydration of ethanol to yield the corresponding alkene. 2024 · 3 marks · Short answer
- Arrange the following alcohols in order of decreasing activity towards Lucas’ reagent. 2-butanol, 2-methyl-2-propanol and… 2024 · 2 marks · Short answer
- Identify the compounds [A], [B] and [C] in each of the following reactions… 2024 · 3 marks · Short answer
- Convert the following by giving chemical equations for each. Ethyl bromide to diethyl ether Phenol to salicylaldehyde 2024 · 2 marks · Short answer
- Write a chemical test to distinguish between ethanol and phenol. Give a chemical reaction to convert acetaldehyde into secondary… 2024 · 2 marks · Short answer
- Choose the appropriate word(s) from the bracket [lead poisoning, zero, phosgene, dependent, cancer, independent, diethyl ether… 2024 · 1 mark · Fill in
- Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [decreases, $\text{CN}^-$ ion… 2024 · 1 mark · Fill in
- How will the following be obtained? (Give chemical equation) Picric acid from phenol Ethanol from formaldehyde 2023 · 2 marks · Short answer
- Account for the following: Phenol is a stronger acid than aliphatic alcohols. Ethanol gives iodoform reaction whereas methanol… 2023 · 3 marks · Short answer
- An organic compound [A] $\text{C}_2\text{H}_6\text{O}$, on heating with conc. $\text{H}_2\text{SO}_4$ at $413\text{ K}$ gives a… 2023 · 2 marks · Short answer
- How will the following be obtained? (Give chemical equation) Ethanol from Grignard’s reagent. Diethyl ether from sodium ethoxide. 2023 · 2 marks · Short answer
- An organic compound ‘A’ on treatment with aq. $\text{KCN}$ produces compound ‘B’. Compound ‘B’ on reduction with… 2023 · 3 marks · Short answer
- Write the chemical equations for the dehydration of ethanol with conc. $\text{H}_2\text{SO}_4$ at $140^\circ\text{C}$ and… 2023 · 2 marks · Short answer
- The optically active compound is: 2022 · 1 mark · MCQ
- Ethyl alcohol when reacts with PCl5 gives a compound (A). When compound (A) is treated with alc. KOH, compound (B) is formed… 2022 · 2 marks · Short answer
- Boiling point of ethyl alcohol is greater than diethyl ether due to: 2022 · 1 mark · MCQ
- An unknown alcohol is treated with Lucas reagent to determine whether the alcohol is primary, secondary or tertiary. Which… 2022 · 2 marks · Short answer
- Reaction between acetone and methyl magnesium chloride, followed by hydrolysis will give: 2022 · 1 mark · MCQ
- Write the mechanism of acid dehydration of ethanol to yield ethene. 2018 · 2 marks · Short answer
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