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Chemistry in Everyday Life: JEE Main Previous Year Questions (2021-2026)
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Page 1 JEE Main Previous Year Questions (2025): Chemistry in Everyday Life Q1: Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is _ _ _ _ %. (nearest integer) (Given molar mass in ???? ?? ?? - ?? ?? : ???? . ?? : ?? , ?? : ???? , ?? : ???? , ?? : ?????? ) Ans: 65% Solution: (Thyroxine Hormone) ? Molecular formula of Thyroxine ? C 15 H 11 O 4 NI 4 ? Molecular mass of Thyroxine - C ? 15 × 12 = 180 H ? 11 × 1 = 11 O ? 16 × 4 = 64 N ? 14 × 1 = 14 I ? 127 × 4 = 508 ? Molecular mass of Thyroxine ? 777 ? % of Iodine = 508 777 × 10 0 = 65 . 38 % Nearest integer = 65% Page 2 JEE Main Previous Year Questions (2025): Chemistry in Everyday Life Q1: Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is _ _ _ _ %. (nearest integer) (Given molar mass in ???? ?? ?? - ?? ?? : ???? . ?? : ?? , ?? : ???? , ?? : ???? , ?? : ?????? ) Ans: 65% Solution: (Thyroxine Hormone) ? Molecular formula of Thyroxine ? C 15 H 11 O 4 NI 4 ? Molecular mass of Thyroxine - C ? 15 × 12 = 180 H ? 11 × 1 = 11 O ? 16 × 4 = 64 N ? 14 × 1 = 14 I ? 127 × 4 = 508 ? Molecular mass of Thyroxine ? 777 ? % of Iodine = 508 777 × 10 0 = 65 . 38 % Nearest integer = 65% Numerical JEE Main 2023 (Online) 1st February Evening Shift Q.1. Among the following, the number of tranquilizer/s is/are ___________. Answer key & Explanation 1. Ans. Correct answer is 3 Explanation Among the following, the number of tranquilizers is 3. tranquilizers, which are medications used to treat anxiety and other mental health conditions.Option D, Salvarsan, is not a tranquilizer, but rather an antibacterial drug used to treat syphilis. Option A. Chloroliazepoxide B. Veronal C. Valium A, B and C, Chloroliazepoxide, Veronal and Valium are A. Chloroliazepoxide B. Veronal C. Valium D. Salvarsan Page 3 JEE Main Previous Year Questions (2025): Chemistry in Everyday Life Q1: Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is _ _ _ _ %. (nearest integer) (Given molar mass in ???? ?? ?? - ?? ?? : ???? . ?? : ?? , ?? : ???? , ?? : ???? , ?? : ?????? ) Ans: 65% Solution: (Thyroxine Hormone) ? Molecular formula of Thyroxine ? C 15 H 11 O 4 NI 4 ? Molecular mass of Thyroxine - C ? 15 × 12 = 180 H ? 11 × 1 = 11 O ? 16 × 4 = 64 N ? 14 × 1 = 14 I ? 127 × 4 = 508 ? Molecular mass of Thyroxine ? 777 ? % of Iodine = 508 777 × 10 0 = 65 . 38 % Nearest integer = 65% Numerical JEE Main 2023 (Online) 1st February Evening Shift Q.1. Among the following, the number of tranquilizer/s is/are ___________. Answer key & Explanation 1. Ans. Correct answer is 3 Explanation Among the following, the number of tranquilizers is 3. tranquilizers, which are medications used to treat anxiety and other mental health conditions.Option D, Salvarsan, is not a tranquilizer, but rather an antibacterial drug used to treat syphilis. Option A. Chloroliazepoxide B. Veronal C. Valium A, B and C, Chloroliazepoxide, Veronal and Valium are A. Chloroliazepoxide B. Veronal C. Valium D. Salvarsan MCQ (Single Correct Answer) Q.1. The reaction used for preparation of soap from fat is : JEE Main 2023 (Online) 10th April Evening Shift Q.2. The statement/s which are true about antagonists from the following is/are: A. They bind to the receptor site. B. Get transferred inside the cell for their action. C. Inhibit the natural communication of the body. D. Mimic the natural messenger. Choose the correct answer from the options given below: Page 4 JEE Main Previous Year Questions (2025): Chemistry in Everyday Life Q1: Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is _ _ _ _ %. (nearest integer) (Given molar mass in ???? ?? ?? - ?? ?? : ???? . ?? : ?? , ?? : ???? , ?? : ???? , ?? : ?????? ) Ans: 65% Solution: (Thyroxine Hormone) ? Molecular formula of Thyroxine ? C 15 H 11 O 4 NI 4 ? Molecular mass of Thyroxine - C ? 15 × 12 = 180 H ? 11 × 1 = 11 O ? 16 × 4 = 64 N ? 14 × 1 = 14 I ? 127 × 4 = 508 ? Molecular mass of Thyroxine ? 777 ? % of Iodine = 508 777 × 10 0 = 65 . 38 % Nearest integer = 65% Numerical JEE Main 2023 (Online) 1st February Evening Shift Q.1. Among the following, the number of tranquilizer/s is/are ___________. Answer key & Explanation 1. Ans. Correct answer is 3 Explanation Among the following, the number of tranquilizers is 3. tranquilizers, which are medications used to treat anxiety and other mental health conditions.Option D, Salvarsan, is not a tranquilizer, but rather an antibacterial drug used to treat syphilis. Option A. Chloroliazepoxide B. Veronal C. Valium A, B and C, Chloroliazepoxide, Veronal and Valium are A. Chloroliazepoxide B. Veronal C. Valium D. Salvarsan MCQ (Single Correct Answer) Q.1. The reaction used for preparation of soap from fat is : JEE Main 2023 (Online) 10th April Evening Shift Q.2. The statement/s which are true about antagonists from the following is/are: A. They bind to the receptor site. B. Get transferred inside the cell for their action. C. Inhibit the natural communication of the body. D. Mimic the natural messenger. Choose the correct answer from the options given below: JEE Main 2023 (Online) 8th April Evening Shift Q.3. Match List I with List II: LIST I LIST II A. Saccharin I. High potency sweetener B. Aspartame II. First artificial sweetening agent C. Alitame III. Stable at cooking temperature D. Sucralose IV. Unstable at cooking temperature Choose the correct answer from the options given below: JEE Main 2023 (Online) 8th April Morning Shift Page 5 JEE Main Previous Year Questions (2025): Chemistry in Everyday Life Q1: Thyroxine, the hormone has given below structure The percentage of iodine in thyroxine is _ _ _ _ %. (nearest integer) (Given molar mass in ???? ?? ?? - ?? ?? : ???? . ?? : ?? , ?? : ???? , ?? : ???? , ?? : ?????? ) Ans: 65% Solution: (Thyroxine Hormone) ? Molecular formula of Thyroxine ? C 15 H 11 O 4 NI 4 ? Molecular mass of Thyroxine - C ? 15 × 12 = 180 H ? 11 × 1 = 11 O ? 16 × 4 = 64 N ? 14 × 1 = 14 I ? 127 × 4 = 508 ? Molecular mass of Thyroxine ? 777 ? % of Iodine = 508 777 × 10 0 = 65 . 38 % Nearest integer = 65% Numerical JEE Main 2023 (Online) 1st February Evening Shift Q.1. Among the following, the number of tranquilizer/s is/are ___________. Answer key & Explanation 1. Ans. Correct answer is 3 Explanation Among the following, the number of tranquilizers is 3. tranquilizers, which are medications used to treat anxiety and other mental health conditions.Option D, Salvarsan, is not a tranquilizer, but rather an antibacterial drug used to treat syphilis. Option A. Chloroliazepoxide B. Veronal C. Valium A, B and C, Chloroliazepoxide, Veronal and Valium are A. Chloroliazepoxide B. Veronal C. Valium D. Salvarsan MCQ (Single Correct Answer) Q.1. The reaction used for preparation of soap from fat is : JEE Main 2023 (Online) 10th April Evening Shift Q.2. The statement/s which are true about antagonists from the following is/are: A. They bind to the receptor site. B. Get transferred inside the cell for their action. C. Inhibit the natural communication of the body. D. Mimic the natural messenger. Choose the correct answer from the options given below: JEE Main 2023 (Online) 8th April Evening Shift Q.3. Match List I with List II: LIST I LIST II A. Saccharin I. High potency sweetener B. Aspartame II. First artificial sweetening agent C. Alitame III. Stable at cooking temperature D. Sucralose IV. Unstable at cooking temperature Choose the correct answer from the options given below: JEE Main 2023 (Online) 8th April Morning Shift Q.4. The group of chemicals used as pesticide is JEE Main 2023 (Online) 6th April Evening Shift Q.5. Given below are two statements: Statement I: Morphine is a narcotic analgesic. It helps in relieving pain without producing sleep. Statement II: Morphine and its derivatives are obtained from opium poppy. In the light of the above statements, choose the correct answer from the options given belowRead More
FAQs on Chemistry in Everyday Life: JEE Main Previous Year Questions (2021-2026)
| 1. What is the role of chemistry in everyday life? |  |
Ans. Chemistry plays a vital role in everyday life as it helps us understand the composition, structure, and properties of substances, as well as the changes they undergo during chemical reactions. From the food we eat, the medicines we take, to the cleaning products we use, chemistry is involved in various aspects that enhance our quality of life.
| 2. How do pharmaceuticals illustrate the application of chemistry? | |
Ans. Pharmaceuticals are a prime example of chemistry in everyday life. They are designed using chemical principles to create compounds that can treat, prevent, or diagnose diseases. The process involves understanding chemical interactions, the synthesis of active ingredients, and ensuring safety and efficacy through rigorous testing and regulations.
| 3. What is the significance of acids and bases in daily activities? | |
Ans. Acids and bases are significant in daily activities as they play crucial roles in various processes. For instance, acids like citric acid in fruits contribute to flavour, while bases like sodium bicarbonate are used in baking. In cleaning products, acids and bases help in breaking down stains and disinfecting surfaces, showcasing their importance in household chores.
| 4. Can you explain the importance of polymers in everyday products? | |
Ans. Polymers are essential in everyday products as they are used to create a wide range of materials, including plastics, rubber, and textiles. Their properties, such as flexibility, durability, and resistance to chemicals, make them ideal for various applications, from packaging and containers to clothing and household items.
| 5. How does understanding chemical reactions benefit us in cooking? | |
Ans. Understanding chemical reactions is beneficial in cooking as it helps us comprehend how ingredients interact and transform during the cooking process. For example, the Maillard reaction, which occurs between amino acids and sugars when food is cooked, contributes to the browning and flavour development in roasted foods, enhancing our culinary experiences.
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