Chemistry in Everyday Life MCQs – Class 11 Foundation
Chemistry in Everyday Life MCQs – Class 11 Foundation
Course: CBSE Class 11 Chemistry – MCQs with Answers and Explanations
Section: Organic Chemistry – MCQ Titles
The following 50 Multiple Choice Questions (MCQs) are strictly aligned with the NCERT chapter “Chemistry in Everyday Life” (Class 11 Foundation level concepts). The questions are arranged section-wise and include clear, concept-clearing explanations, making them ideal for CBSE exam preparation and concept building.
Section A: Introduction to Chemistry in Everyday Life
1. Chemistry in everyday life mainly deals with
A. laboratory reactions only
B. industrial synthesis
C. application of chemicals in daily activities
D. nuclear reactions
Answer: C
Explanation: This branch focuses on chemicals used in medicines, food, cleaning agents, and materials used daily.
2. Which of the following best represents chemistry in daily life?
A. Fuels
B. Medicines
C. Soaps and detergents
D. All of these
Answer: D
Explanation: All listed items involve chemical principles applied in daily use.
Section B: Drugs and Medicines
3. A drug is a chemical substance used for
A. enhancing taste of food
B. diagnosing, preventing or curing diseases
C. industrial cleaning
D. fertiliser production
Answer: B
Explanation: Drugs are chemicals that affect biological systems for therapeutic use.
4. Which drug is used to reduce fever?
A. Antibiotic
B. Analgesic
C. Antipyretic
D. Antiseptic
Answer: C
Explanation: Antipyretics are drugs that lower body temperature.
5. Aspirin is classified as
A. antibiotic
B. antacid
C. analgesic and antipyretic
D. antiseptic
Answer: C
Explanation: Aspirin relieves pain and reduces fever.
6. Antibiotics are drugs that
A. kill viruses
B. kill or inhibit bacteria
C. increase immunity
D. reduce acidity
Answer: B
Explanation: Antibiotics act specifically against bacterial infections.
7. Penicillin was discovered by
A. Louis Pasteur
B. Alexander Fleming
C. Robert Koch
D. Edward Jenner
Answer: B
Explanation: Alexander Fleming discovered penicillin in 1928.
Section C: Antiseptics and Disinfectants
8. Antiseptics are applied on
A. floors
B. drains
C. wounds
D. walls
Answer: C
Explanation: Antiseptics prevent infection on living tissues.
9. Which of the following is an antiseptic?
A. Phenyl
B. Lysol
C. Dettol
D. Bleaching powder
Answer: C
Explanation: Dettol is safe for use on skin.
10. Disinfectants are used to
A. treat wounds
B. clean instruments and surfaces
C. cure diseases
D. increase shelf life
Answer: B
Explanation: Disinfectants kill microbes on non-living objects.
11. Phenol in dilute solution acts as
A. disinfectant
B. antiseptic
C. analgesic
D. antacid
Answer: B
Explanation: Dilute phenol can be used as antiseptic.
Section D: Analgesics, Antacids and Antihistamines
12. Analgesics are drugs used to
A. reduce fever
B. cure infections
C. relieve pain
D. treat acidity
Answer: C
Explanation: Analgesics reduce pain without causing unconsciousness.
13. Which is a non-narcotic analgesic?
A. Morphine
B. Codeine
C. Aspirin
D. Heroin
Answer: C
Explanation: Aspirin does not cause addiction.
14. Antacids are used to
A. increase acidity
B. neutralise excess stomach acid
C. cure ulcers
D. kill bacteria
Answer: B
Explanation: Antacids relieve acidity and indigestion.
15. Which is a commonly used antacid?
A. NaCl
B. Mg(OH)₂
C. CuSO₄
D. HCl
Answer: B
Explanation: Magnesium hydroxide neutralises excess acid.
16. Antihistamines are used to treat
A. fever
B. allergy
C. pain
D. infection
Answer: B
Explanation: They counteract the effect of histamine released during allergies.
Section E: Soaps and Detergents
17. Soaps are sodium or potassium salts of
A. inorganic acids
B. fatty acids
C. mineral acids
D. amino acids
Answer: B
Explanation: Soaps are salts of long-chain fatty acids.
18. Soaps are ineffective in hard water because
A. they dissolve easily
B. they form scum
C. they react with water
D. they evaporate
Answer: B
Explanation: Calcium and magnesium ions form insoluble scum.
19. Detergents are better than soaps because they
A. are cheaper
B. work in hard water
C. are natural products
D. are biodegradable only
Answer: B
Explanation: Detergents do not form scum with hard water.
20. Which of the following is a synthetic detergent?
A. Soap flakes
B. Washing soda
C. Sodium stearate
D. Sodium alkyl benzene sulphonate
Answer: D
Explanation: It is a common detergent used in washing powders.
21. The cleaning action of soap is due to
A. acidity
B. micelle formation
C. foaming
D. hydrolysis
Answer: B
Explanation: Micelles trap grease and remove it with water.
Section F: Food Additives and Preservatives
22. Food preservatives are added to
A. increase colour
B. enhance flavour
C. prevent spoilage
D. increase weight
Answer: C
Explanation: Preservatives inhibit microbial growth.
23. Common salt is used as a preservative in
A. fruits
B. vegetables
C. meat and fish
D. milk
Answer: C
Explanation: Salt prevents bacterial growth by dehydration.
24. Sodium benzoate is commonly used as
A. flavouring agent
B. sweetener
C. preservative
D. antioxidant
Answer: C
Explanation: It preserves acidic foods.
25. Artificial sweeteners are used to
A. increase calories
B. reduce sweetness
C. replace sugar
D. preserve food
Answer: C
Explanation: They provide sweetness without adding calories.
Section G: Cleansing Agents and Cosmetics
26. Toothpaste mainly contains
A. acids
B. bases
C. abrasives
D. alcohols
Answer: C
Explanation: Abrasives help remove food particles and plaque.
27. Shampoos are mainly used to
A. soften hair
B. colour hair
C. clean hair
D. straighten hair
Answer: C
Explanation: Shampoos remove oil and dirt from hair.
28. Deodorants help to
A. prevent sweating
B. kill bacteria causing bad odour
C. cool the body
D. moisturise skin
Answer: B
Explanation: They reduce odour-causing bacterial activity.
Section H: Chemicals as Fuels and Materials
29. LPG mainly consists of
A. methane
B. ethane
C. propane and butane
D. ethyne
Answer: C
Explanation: LPG is a mixture of propane and butane.
30. CNG is preferred as a fuel because it
A. is costly
B. causes more pollution
C. burns cleanly
D. has low energy
Answer: C
Explanation: CNG produces less harmful emissions.
31. Plastics are widely used because they are
A. biodegradable
B. heavy
C. durable and versatile
D. expensive
Answer: C
Explanation: Plastics are strong, light, and corrosion-resistant.
Section I: Health and Environmental Concerns
32. Excessive use of medicines may cause
A. immunity increase
B. drug resistance
C. faster recovery
D. no effect
Answer: B
Explanation: Overuse leads to resistant strains of microbes.
33. Detergents cause water pollution mainly because they
A. are acidic
B. are non-biodegradable
C. increase hardness
D. evaporate
Answer: B
Explanation: Non-biodegradable detergents persist in water.
34. Which chemical is used for water disinfection?
A. Alcohol
B. Chlorine
C. Soap
D. Phenol
Answer: B
Explanation: Chlorine kills harmful microorganisms in water.
Section J: Conceptual NCERT-Based MCQs
35. Medicines should be used
A. frequently
B. without prescription
C. as per medical advice
D. in large doses
Answer: C
Explanation: Incorrect use can cause side effects.
36. Which of the following is biodegradable?
A. Soap
B. Detergent
C. Plastic
D. Synthetic polymer
Answer: A
Explanation: Soaps are biodegradable.
37. Antacids work by
A. increasing acid secretion
B. killing bacteria
C. neutralising excess acid
D. reducing enzymes
Answer: C
Explanation: They are basic substances.
Section K: Application-Based MCQs
38. Which chemical is used in pain relief balms?
A. Ethanol
B. Menthol
C. Glucose
D. Sodium chloride
Answer: B
Explanation: Menthol provides cooling and pain relief.
39. Which drug can cause addiction?
A. Aspirin
B. Paracetamol
C. Morphine
D. Antacid
Answer: C
Explanation: Morphine is a narcotic analgesic.
40. Which cleaning agent is eco-friendly?
A. Strong acids
B. Biodegradable detergents
C. Phenyl
D. Bleach
Answer: B
Explanation: They decompose naturally.
Section L: Final High-Order MCQs
41. Chemistry in everyday life mainly helps in
A. understanding nature
B. improving quality of life
C. increasing pollution
D. laboratory research only
Answer: B
Explanation: Chemical applications make life healthier and convenient.
42. Which compound is used as antiseptic in mouthwash?
A. Alcohol
B. Phenol
C. Iodine
D. Hydrogen peroxide
Answer: D
Explanation: Dilute H₂O₂ is used for oral hygiene.
43. Detergents clean better because they
A. form scum
B. reduce surface tension effectively
C. are acidic
D. increase hardness
Answer: B
Explanation: Lower surface tension improves cleaning action.
44. Artificial sweeteners are especially useful for
A. children
B. diabetic patients
C. athletes
D. infants
Answer: B
Explanation: They do not increase blood glucose level.
45. Excess use of fertilisers affects health by
A. improving immunity
B. increasing yield only
C. contaminating food and water
D. reducing pollution
Answer: C
Explanation: Chemical residues cause health hazards.
46. Soaps are ineffective in acidic water because
A. they dissolve
B. they hydrolyse
C. fatty acids precipitate
D. they oxidise
Answer: C
Explanation: Free fatty acids form insoluble precipitates.
47. Cosmetics should be used carefully because they
A. are edible
B. may cause skin allergies
C. cure diseases
D. improve immunity
Answer: B
Explanation: Some chemicals may cause irritation.
48. Which compound is used as a disinfectant in swimming pools?
A. Sodium chloride
B. Chlorine
C. Alcohol
D. Soap
Answer: B
Explanation: Chlorine kills harmful microorganisms.
49. The most important role of chemistry in daily life is
A. luxury
B. comfort and health
C. pollution
D. waste production
Answer: B
Explanation: Chemistry improves living standards and healthcare.
50. Chemistry in everyday life emphasises
A. memorisation
B. theoretical knowledge only
C. practical applications
D. complex reactions
Answer: C
Explanation: Focus is on real-life use of chemical principles.
✅ Completion Note
This completes a fully NCERT-aligned, CBSE-standard set of 50 MCQs on Chemistry in Everyday Life, ideal for foundation building, concept clarity, and exam preparation.