Haloalkanes and Haloarenes - ISC Class 12 Chemistry Questions with Answers
47 past-paper questions on Haloalkanes and Haloarenes from ISC Class 12 Chemistry papers (2027-2018), newest first. Open one to see its answer.
- How can the following conversions be carried out? (Write the chemical equations): Aniline to chlorobenzene Chloroethane to… 2027 · 2 marks · Short answer
- Two students Rehan and Ananya were given the same compound, alkyl halide ($\text{C}_2\text{H}_5\text{Cl}$) by their chemistry… 2027 · 3 marks · Short answer
- Write the structural formula of the major product formed in each of the following reactions… 2026 · 3 marks · Short answer
- Choose the appropriate word(s) from the bracket [first, zero, second, Raoult’s law, non-ideal, addition, substitution, Henry’s… 2026 · 1 mark · Fill in
- Fill in the blanks by choosing the appropriate word(s) from those given in the brackets: [electrophilic, four, 4-bromophenol… 2026 · 1 mark · Fill in
- Choose the appropriate word(s) from the bracket [first, alc. AgCN, primary, decrease, third, increase, zero, Lucas, alc. KCN… 2026 · 1 mark · Fill in
- Write chemical equations to convert each of the following: Chlorobenzene to aniline Iodoform to acetylene 2026 · 2 marks · Short answer
- When Chlorobenzene is heated with aq. ammonia in the presence of $\text{Cu}_2\text{O}$ at high pressure, it gives: 2026 · 1 mark · MCQ
- Write the chemical reactions when: Chlorobenzene is heated with conc. $\text{HNO}_3$ in the presence of conc… 2026 · 3 marks · Short answer
- The reactivity orders of alkyl halides for dehydrohalogenation reaction are given below: (P) $\text{R-I} > \text{R-Br}$ (Q)… 2026 · 1 mark · MCQ
- Write the chemical equations to convert each of the following: Aniline to bromobenzene Ethyl chloride to propanoic acid 2026 · 2 marks · Short answer
- Write the structural formula of the main organic compound formed in each of the following reactions… 2026 · 3 marks · Short answer
- Write the chemical equations to convert each of the following: Chlorobenzene to benzoic acid 1-bromopropane to 2-bromopropane 2026 · 2 marks · Short answer
- Which compound in each of the following pairs will react faster by $S_N2$ mechanism with –OH and why? $\text{CH}_3\text{Br}$ or… 2025 · 3 marks · Short answer
- When an organic compound [A] having molecular formula $\text{C}_4\text{H}_9\text{Br}$ is treated with aqueous $\text{KOH}$, the… 2025 · 2 marks · Short answer
- Devise a scheme for the synthesis of n-butane using $\text{CH}_3\text{I}$ as the only source of carbon. Is it possible to obtain… 2025 · 2 marks · Short answer
- Write chemical equations to illustrate the following name reactions: Finkelstein reaction Williamson’s synthesis Reimer-Tiemann… 2025 · 3 marks · Short answer
- According to Markownikoff’s rule, “The negative part of the halogen acid attaches itself with that C atom of an unsymmetrical… 2025 · 1 mark · MCQ
- The process of halogenation of benzene takes place in the presence of anhydrous $\text{FeCl}_3$. Given below are two statements… 2025 · 1 mark · Assertion-reason
- Elimination reactions of Haloalkanes takes place in the presence of ____ $\text{KOH}$ at ____ position of carbon atom. 2025 · 1 mark · Fill in
- Rahul wants to prepare chloroform in the laboratory using ethanol. The correct order of preparation is: 2025 · 1 mark · MCQ
- 3-bromo 3-methylhexane reacts with aq. KOH to give racemic mixture of products. Identify the type of reaction mechanism. Draw the… 2025 · 3 marks · Short answer
- You are provided with KOH (alc. and aq), $\text{Cl}_2$, HBr, acidified $\text{K}_2\text{Cr}_2\text{O}_7$, NaOH and soda lime… 2025 · 2 marks · Short answer
- The use of phosphorus chlorides is preferred to thionyl chloride in the preparation of alkyl chlorides from alcohol. Given below… 2025 · 1 mark · Assertion-reason
- Given below are the two types of mechanism of the reaction: Answer the following questions: Why is the product obtained in (A)… 2025 · 2 marks · Short answer
- The C-X bond length in haloarenes is shorter due to: 2025 · 1 mark · MCQ
- Write chemical equations to convert the following: Chlorobenzene to biphenyl Chloroform to acetylene 2025 · 2 marks · Short answer
- Electrophilic substitution reactions in haloarenes takes place in ortho and para positions and the major product is para… 2025 · 1 mark · Assertion-reason
- Chloroform was synthesised in the year 1847. It was mainly used in the medicine industry. When exposed to sunlight it forms a… 2025 · 3 marks · Short answer
- Tertiary butyl bromide undergoes Wurtz reaction to give 2,2,3,3-tetramethylbutane. Given below are two statements marked… 2025 · 1 mark · Assertion-reason
- Two compounds, D-2-chlorobutane and L-2-chlorobutane, are enantiomers of each other. Name one physical property that is: same for… 2024 · 2 marks · Short answer
- 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
- Choose the appropriate word(s) from the bracket [lead poisoning, zero, phosgene, dependent, cancer, independent, diethyl ether… 2024 · 1 mark · Fill in
- How will you bring the following conversions? Benzene to biphenyl Iodoform to acetylene 2024 · 2 marks · Short answer
- Give balanced chemical equations to convert the following: Benzene to biphenyl Propene to propane-1-ol 2024 · 2 marks · Short answer
- Write the balanced chemical equations for the following name reactions: Sandmeyer’s reaction Wurtz reaction Finkelstein reaction 2023 · 3 marks · Short answer
- Question 2023 · 2 marks · Short answer
- Identify compounds [A] and [B] in the following reactions… 2023 · 2 marks · Short answer
- Give chemical equations for each of the following: Ethyl chloride is treated with aqueous $\text{KOH}$ solution. Chlorobenzene is… 2023 · 2 marks · Short answer
- The gas obtained on heating iodoform with silver powder is: 2022 · 1 mark · MCQ
- Conversion of Chlorobenzene into phenol. Which of the following statements is correct for the above conversion? What is the name… 2022 · 2 marks · Short answer
- Haloalkanes when treated with alcoholic KCN forms alkane nitrile as a major product. 2022 · 1 mark · Assertion-reason
- During the course of SN1 reaction, the intermediate species formed is: 2022 · 1 mark · MCQ
- The reaction: $\text{CH}_3\text{Br} + \text{OH}^- \rightarrow \text{CH}_3\text{OH} + \text{Br}^-$ The expected mechanism of the… 2022 · 2 marks · Short answer
- How will you convert the following: Chlorobenzene to biphenyl. Propene to 1-bromopropane. Chlorobenzene to aniline. 2020 · 3 marks · Short answer
- Write the balanced chemical equation for each of the following: Chlorobenzene treated with ammonia in the presence of… 2019 · 2 marks · Short answer
- What will be the major product obtained when 2-bromobutane reacts with alcoholic potassium hydroxide? State the type of reaction… 2018 · 2 marks · Short answer
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