NEET Chemistry in Everyday Life PYQs & Practice Questions

10 free NEET Chemistry questions on Chemistry in Everyday Life, starting with previous year questions (2017–2023). Tap “Show answer” to check each one. No login needed.

Topics: Drugs and their Classification · Antimicrobials · Antacids · Soaps and Detergents · Drugs - Receptors and Action · Antiseptics and Disinfectants · Food Preservatives and Additives · Cleansing Action of Soaps · Drugs - Enzyme Inhibitors · Antifertility Drugs and Hormones · Drugs - Enzyme Inhibition · Antibiotics

1. Q1NEET 2023Drugs - Tranquilizers

   Some tranquilizers are listed below. Which one from the following belongs to barbiturates?

   • A. Meprobamate
   • B. Valium
   • C. Veronal
   • D. Chlordiazepoxide
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   Answer: B — Valium

   Veronal (barbital) is a barbiturate, a class of sedative/tranquilizer drugs derived from barbituric acid. Meprobamate is a different class of tranquilizer, while Valium and Chlordiazepoxide are benzodiazepines.

2. Q2NEET 2021Drugs - Analgesics

   Given below are two statements: Statement I: Aspirin and Paracetamol belong to the class of narcotic analgesics. Statement II: Morphine and Heroin are non-narcotic analgesics. In the light of the above statements, choose the correct answer from the options given below.

   • A. Statement I is incorrect but Statement II is true.
   • B. Both Statement I and Statement II are true.
   • C. Both Statement I and Statement II are false.
   • D. Statement I is correct but Statement II is false.
   Show answer

   Answer: B — Both Statement I and Statement II are true.

   Aspirin and Paracetamol are non-narcotic analgesics, while Morphine and Heroin are narcotic analgesics. Both statements as given are false.

3. Q3NEET 2017Antiseptics

   Mixture of chloroxylenol and terpineol acts as:

   • A. antiseptic
   • B. antipyretic
   • C. antibiotic
   • D. analgesic
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   Answer: —

   A mixture of chloroxylenol and terpineol is used as an antiseptic (commonly known as Dettol), applied on wounds, cuts, and skin to prevent microbial infection.

4. Q4Drugs and their Classification

   Which of the following is classified as an analgesic?

   • A. Chlorpromazine
   • B. Meprobamate
   • C. Morphine
   • D. Valium
   Show answer

   Answer: B — Meprobamate

   Morphine is a narcotic analgesic used to relieve pain. Chlorpromazine is an antipsychotic, Meprobamate and Valium (diazepam) are tranquilizers.

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5. Q5Antimicrobials

   Which of the following is the first antibiotic discovered by Alexander Fleming?

   • A. Streptomycin
   • B. Tetracycline
   • C. Chloramphenicol
   • D. Penicillin
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   Answer: C — Chloramphenicol

   Penicillin was the first antibiotic, discovered by Alexander Fleming in 1929 from the mould Penicillium notatum. Streptomycin, tetracycline, and chloramphenicol are antibiotics discovered later.

6. Q6Antacids

   Which of the following is used as an antacid to neutralize excess hydrochloric acid in the stomach?

   • A. Aspirin
   • B. Milk of magnesia (Mg(OH)₂)
   • C. Bithional
   • D. Paracetamol
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   Answer: A — Aspirin

   Milk of magnesia (Mg(OH)₂) is a mild base used as an antacid to neutralize excess HCl in the stomach. Aspirin and Paracetamol are analgesics, and Bithional is an antiseptic.

7. Q7Soaps and Detergents

   Why do soaps not work effectively in hard water?

   • A. Soaps get hydrolyzed in hard water forming acidic compounds
   • B. Ca²⁺ and Mg²⁺ ions in hard water react with soap to form insoluble scum
   • C. Hard water has high pH which denatures the soap molecules
   • D. Soaps form micelles only in soft water due to lower surface tension
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   Answer: A — Soaps get hydrolyzed in hard water forming acidic compounds

   Hard water contains Ca²⁺ and Mg²⁺ ions which react with the sodium or potassium salts of fatty acids (soaps) to form insoluble calcium and magnesium salts (scum), thus reducing the cleansing action of soaps.

8. Q8Drugs - Receptors and Action

   Which type of drugs bind to the receptor site and inhibit its natural function by blocking it without activating it?

   • A. Agonists
   • B. Antagonists
   • C. Allosteric modulators
   • D. Enzyme activators
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   Answer: A — Agonists

   Antagonists are drugs that bind to the receptor sites and block the natural substrate or neurotransmitter from binding, thereby inhibiting the natural function. Agonists mimic the natural messenger and activate the receptor.

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9. Q9Antiseptics and Disinfectants

   A 0.2% solution of phenol acts as an antiseptic, while a 1% solution acts as a disinfectant. This illustrates that:

   • A. Antiseptics are chemically different from disinfectants
   • B. The same chemical can act as antiseptic or disinfectant depending on concentration
   • C. Phenol selectively kills bacteria on living tissue only at low concentration
   • D. Disinfectants are always more acidic than antiseptics
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   Answer: A — Antiseptics are chemically different from disinfectants

   The same chemical substance can act as an antiseptic (safe for living tissue at lower concentration) or as a disinfectant (used on non-living surfaces at higher concentration). This is well illustrated by phenol.

10. Q10Food Preservatives and Additives

    Which of the following is a commonly used artificial sweetener that is considered safe for diabetics and is approximately 550 times sweeter than cane sugar?

    • A. Saccharin
    • B. Sucralose
    • C. Alitame
    • D. Aspartame
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    Answer: A — Saccharin

    Sucralose is a trichloro derivative of sucrose that is approximately 600 times sweeter than sucrose (close to 550 in some references), is safe for diabetics, and is stable at cooking temperatures. Aspartame is ~100 times sweeter, saccharin ~550 times but with concerns about safety, and alitame is ~2000 times sweeter.