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Page 1 2024 Q1 - 2024 (01 Feb Shift 1) Which of the following compound will most easily be attacked by an electrophile? (1) (2) (3) (4) Q2 - 2024 (01 Feb Shift 1) Given below are two statements: Statement (I) : The NH 2 group in Aniline is ortho and para directing and a powerful activating group. Page 2 2024 Q1 - 2024 (01 Feb Shift 1) Which of the following compound will most easily be attacked by an electrophile? (1) (2) (3) (4) Q2 - 2024 (01 Feb Shift 1) Given below are two statements: Statement (I) : The NH 2 group in Aniline is ortho and para directing and a powerful activating group. Statement (II) : Aniline does not undergo Friedel Craft's reaction (alkylation and acylation). In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are correct (2) Both Statement I and Statement II are incorrect (3) Statement I is incorrect but Statement II is correct (4) Statement I is correct but Statement II is incorrect Q3 - 2024 (01 Feb Shift 1) Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is Q4 - 2024 (01 Feb Shift 2) In the given reactions identify ?? and ?? . CH 3 - C = C- CH 3 + H 2 ? Na / Liquid NH 3 "B" (1) A : 2-Pentyne; B : trans - 2 - butene (2) A : n-Pentane; B : trans - 2 - butene (3) A : 2 - Pentyne; B : C is -2 - butene (4) A : n-Pentane; B : C is -2 - butene Q5 - 2024 (01 Feb Shift 2) Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 methylbutane is Q6 - 2024 (27 Jan Shift 1) Page 3 2024 Q1 - 2024 (01 Feb Shift 1) Which of the following compound will most easily be attacked by an electrophile? (1) (2) (3) (4) Q2 - 2024 (01 Feb Shift 1) Given below are two statements: Statement (I) : The NH 2 group in Aniline is ortho and para directing and a powerful activating group. Statement (II) : Aniline does not undergo Friedel Craft's reaction (alkylation and acylation). In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are correct (2) Both Statement I and Statement II are incorrect (3) Statement I is incorrect but Statement II is correct (4) Statement I is correct but Statement II is incorrect Q3 - 2024 (01 Feb Shift 1) Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is Q4 - 2024 (01 Feb Shift 2) In the given reactions identify ?? and ?? . CH 3 - C = C- CH 3 + H 2 ? Na / Liquid NH 3 "B" (1) A : 2-Pentyne; B : trans - 2 - butene (2) A : n-Pentane; B : trans - 2 - butene (3) A : 2 - Pentyne; B : C is -2 - butene (4) A : n-Pentane; B : C is -2 - butene Q5 - 2024 (01 Feb Shift 2) Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 methylbutane is Q6 - 2024 (27 Jan Shift 1) 3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ' A ' is Q7 - 2024 (27 Jan Shift 2) Among the following, total number of meta directing functional groups is (Integer based) -OCH 3 ,-NO 2 ,-CN,-CH 3 - NHCOCH 3 , -COR,-OH,-COOH,-Cl Q8 - 2024 (27 Jan Shift 2) The final product A, formed in the following reaction sequence is: (1) Ph - CH 2 - CH 2 - CH 3 (2) (3) (4) Ph - CH 2 - CH 2 - CH 2 - OH Q9 - 2024 (29 Jan Shift 1) The major product (P) in the following reaction is Page 4 2024 Q1 - 2024 (01 Feb Shift 1) Which of the following compound will most easily be attacked by an electrophile? (1) (2) (3) (4) Q2 - 2024 (01 Feb Shift 1) Given below are two statements: Statement (I) : The NH 2 group in Aniline is ortho and para directing and a powerful activating group. Statement (II) : Aniline does not undergo Friedel Craft's reaction (alkylation and acylation). In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are correct (2) Both Statement I and Statement II are incorrect (3) Statement I is incorrect but Statement II is correct (4) Statement I is correct but Statement II is incorrect Q3 - 2024 (01 Feb Shift 1) Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is Q4 - 2024 (01 Feb Shift 2) In the given reactions identify ?? and ?? . CH 3 - C = C- CH 3 + H 2 ? Na / Liquid NH 3 "B" (1) A : 2-Pentyne; B : trans - 2 - butene (2) A : n-Pentane; B : trans - 2 - butene (3) A : 2 - Pentyne; B : C is -2 - butene (4) A : n-Pentane; B : C is -2 - butene Q5 - 2024 (01 Feb Shift 2) Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 methylbutane is Q6 - 2024 (27 Jan Shift 1) 3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ' A ' is Q7 - 2024 (27 Jan Shift 2) Among the following, total number of meta directing functional groups is (Integer based) -OCH 3 ,-NO 2 ,-CN,-CH 3 - NHCOCH 3 , -COR,-OH,-COOH,-Cl Q8 - 2024 (27 Jan Shift 2) The final product A, formed in the following reaction sequence is: (1) Ph - CH 2 - CH 2 - CH 3 (2) (3) (4) Ph - CH 2 - CH 2 - CH 2 - OH Q9 - 2024 (29 Jan Shift 1) The major product (P) in the following reaction is (1) (2) (3) (4) Q10 - 2024 (29 Jan Shift 1) The arenium ion which is not involved in the bromination of Aniline is Page 5 2024 Q1 - 2024 (01 Feb Shift 1) Which of the following compound will most easily be attacked by an electrophile? (1) (2) (3) (4) Q2 - 2024 (01 Feb Shift 1) Given below are two statements: Statement (I) : The NH 2 group in Aniline is ortho and para directing and a powerful activating group. Statement (II) : Aniline does not undergo Friedel Craft's reaction (alkylation and acylation). In the light of the above statements, choose the most appropriate answer from the options given below : (1) Both Statement I and Statement II are correct (2) Both Statement I and Statement II are incorrect (3) Statement I is incorrect but Statement II is correct (4) Statement I is correct but Statement II is incorrect Q3 - 2024 (01 Feb Shift 1) Total number of deactivating groups in aromatic electrophilic substitution reaction among the following is Q4 - 2024 (01 Feb Shift 2) In the given reactions identify ?? and ?? . CH 3 - C = C- CH 3 + H 2 ? Na / Liquid NH 3 "B" (1) A : 2-Pentyne; B : trans - 2 - butene (2) A : n-Pentane; B : trans - 2 - butene (3) A : 2 - Pentyne; B : C is -2 - butene (4) A : n-Pentane; B : C is -2 - butene Q5 - 2024 (01 Feb Shift 2) Total number of isomeric compounds (including stereoisomers) formed by monochlorination of 2 methylbutane is Q6 - 2024 (27 Jan Shift 1) 3-Methylhex-2-ene on reaction with HBr in presence of peroxide forms an addition product (A). The number of possible stereoisomers for ' A ' is Q7 - 2024 (27 Jan Shift 2) Among the following, total number of meta directing functional groups is (Integer based) -OCH 3 ,-NO 2 ,-CN,-CH 3 - NHCOCH 3 , -COR,-OH,-COOH,-Cl Q8 - 2024 (27 Jan Shift 2) The final product A, formed in the following reaction sequence is: (1) Ph - CH 2 - CH 2 - CH 3 (2) (3) (4) Ph - CH 2 - CH 2 - CH 2 - OH Q9 - 2024 (29 Jan Shift 1) The major product (P) in the following reaction is (1) (2) (3) (4) Q10 - 2024 (29 Jan Shift 1) The arenium ion which is not involved in the bromination of Aniline is (1) (2) (3) (4)Read More
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FAQs on Hydrocarbons: JEE Mains Previous Year Questions (2021-2024) - Chemistry for JEE Main & Advanced
| 1. What are hydrocarbons? |  |
Ans. Hydrocarbons are organic compounds composed of only carbon and hydrogen atoms. They are the simplest forms of organic compounds and can be found in various forms, including alkanes, alkenes, and alkynes.
| 2. What is the importance of hydrocarbons? | |
Ans. Hydrocarbons play a crucial role in our daily lives. They are the main components of fossil fuels such as coal, natural gas, and petroleum. These fuels are used for energy production and transportation. Hydrocarbons are also used as raw materials in the production of plastics, solvents, lubricants, and various other chemicals.
| 3. How are hydrocarbons classified? | |
Ans. Hydrocarbons are classified based on the type of carbon-carbon bonds present in their structure. Alkanes have single bonds between carbon atoms, alkenes have double bonds, and alkynes have triple bonds. The number of carbon atoms in the hydrocarbon chain also determines the classification (e.g., methane, ethane, propane, etc.).
| 4. What is the general formula for alkanes? | |
Ans. The general formula for alkanes is CnH2n+2, where "n" represents the number of carbon atoms in the alkane chain. For example, methane (CH4) is the simplest alkane with one carbon atom, while butane (C4H10) has four carbon atoms.
| 5. How do hydrocarbons contribute to air pollution? | |
Ans. Hydrocarbons, when released into the atmosphere through the burning of fossil fuels or other sources, can react with nitrogen oxides and sunlight to form ground-level ozone. This ozone is a major component of smog and can cause respiratory problems. Hydrocarbons are also associated with the formation of greenhouse gases, contributing to climate change.
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