Chemistry in Everyday Life — Class 11 MCQs with Answers
Class 11 CBSE Chemistry · Chapter 308
40 practice questions · 20 Easy · 20 Medium · Updated
Practise the most important Class 11 CBSE Chemistry questions from Chapter 308, "Chemistry in Everyday Life". You get 4 timed quizzes made from 40 NCERT-based MCQs, with answers and explanations. The questions are split into 20 Easy and 20 Medium. Warm up on the basics, then move on to the exam-level questions that set top scorers in CBSE & Maharashtra HSC Board exams, JEE Main, MHT-CET, JEE Advanced and NEET UG apart.
To score well in "Chemistry in Everyday Life", focus on reactions, key concepts and careful numericals. Each MCQ here is timed and uses exam-style marking (+4 correct, −1 wrong, 0 skipped). This trains you to stay accurate under time pressure, as real papers need. Every question has a short explanation, so a wrong answer becomes a quick lesson. It is the fastest way to fix gaps before a test.
Use this chapter for focused revision. Start with the Easy set to check your basics on Chemistry in Everyday Life, then move to Medium to practise applying them. Your accuracy, streaks and XP save automatically. This chapter also adds to your overall Class 11 Chemistry mastery score. 6 sample questions are solved in full below, with the answer and a worked explanation. Sign in free to start practising.
Key concepts: Chemistry in Everyday Life (Class 11 Chemistry)
This chapter shows chemistry doing everyday work: curing disease, keeping food edible and getting clothes clean. It begins with drugs, defined as low molar mass chemicals that interact with a biological target, and the four ways of classifying them — by pharmacological effect, by drug action, by chemical structure and by molecular target. It then explains how a drug actually works, either by inhibiting an enzyme at its active or allosteric site or by acting as an agonist or antagonist at a receptor, and surveys the main therapeutic classes: antacids, antihistamines, tranquilisers, narcotic and non-narcotic analgesics, antimicrobials, antiseptics, disinfectants and antifertility drugs. The last two sections deal with chemicals added to food — artificial sweeteners, preservatives and antioxidants — and with cleansing agents, covering the saponification of oils to soap, the three families of synthetic detergents and the problem of biodegradability.
- Drug and medicine
- A drug is a chemical of low molar mass, usually 100 to 500 u, that interacts with a macromolecular target and produces a biological response. It is a medicine only when that response is useful in therapy and the dose is correct; above the therapeutic dose the same chemical is toxic or habit forming.
- Four ways of classifying drugs
- By pharmacological effect (all analgesics together, most useful to a doctor), by drug action (the biochemical process affected, such as blocking histamine), by chemical structure (drugs sharing a skeleton such as the sulphonamides), and by molecular target (drugs acting on one enzyme or receptor, most useful to a medicinal chemist).
- Enzymes as drug targets
- Enzymes are protein catalysts that hold a substrate at an active site and speed up its reaction. A competitive inhibitor resembles the substrate and blocks the active site, while an allosteric or non-competitive inhibitor binds elsewhere and changes the shape of the active site. Weak, reversible bonding is preferred because covalent binding inhibits the enzyme permanently.
- Receptors, agonists and antagonists
- Receptors are proteins embedded in the cell membrane whose binding site faces outwards and receives chemical messengers. An agonist mimics the natural messenger and switches the receptor on, whereas an antagonist occupies the site and blocks the message. Small differences between receptors let a drug be made selective and so reduce side effects.
Chemistry in Everyday Life — important questions & MCQs with answers (Class 11 Chemistry)
6 solved questions from this chapter's difficulty levels, each with its answer and explanation. The other 34 are timed and scored when you sign in.
- Q1Easy
The use of chemicals for the treatment of a disease is called
A.physiotherapyB.radiotherapyC.chemotherapy✓ CorrectD.immunotherapyAnswer: C. chemotherapy
Explanation: Chemotherapy is the treatment of disease using chemicals (drugs) that act on specific targets in the body.
- Q2Easy
Enzymes, which act as one of the main drug targets in the body, are
A.proteins that catalyse biochemical reactions✓ CorrectB.lipids stored in the cell membraneC.simple inorganic saltsD.carbohydrates that store energyAnswer: A. proteins that catalyse biochemical reactions
Explanation: Enzymes are protein biocatalysts; they hold the substrate at an active site and speed up the reaction, and a drug can interfere with either step.
- Q3Easy
Magnesium hydroxide and aluminium hydroxide are used in medicine as
A.antacids that neutralise excess stomach acid✓ CorrectB.antibiotics that kill bacteriaC.tranquilisers that relieve anxietyD.antiseptics applied to woundsAnswer: A. antacids that neutralise excess stomach acid
Explanation: These mild bases neutralise the excess hydrochloric acid in the stomach and so relieve acidity and heartburn.
- Q4Medium
Which classification of drugs is the most useful to a medicinal chemist who wants to design a new drug?
A.Classification on the basis of pharmacological effectB.Classification on the basis of molecular target✓ CorrectC.Classification on the basis of the route of administrationD.Classification on the basis of costAnswer: B. Classification on the basis of molecular target
Explanation: Drugs acting on the same target share the structural features needed to fit it, so a chemist designing a new molecule works from the target rather than from the clinical effect.
- Q5Medium
A drug that binds to the allosteric site of an enzyme rather than its active site inhibits the enzyme because it
A.destroys the enzyme molecule completelyB.changes the shape of the active site so that the substrate no longer fits✓ CorrectC.converts the enzyme into a receptorD.increases the concentration of the substrateAnswer: B. changes the shape of the active site so that the substrate no longer fits
Explanation: Allosteric (non-competitive) inhibitors bind at a different site, but the resulting change in the enzyme's shape distorts the active site so catalysis stops.
- Q6Medium
Ranitidine and cimetidine control acidity better than ordinary antacids because they
A.neutralise the acid faster than metal hydroxidesB.prevent histamine from binding to the H₂ receptors, so less HCl is released✓ CorrectC.coat the stomach wall with an insoluble filmD.kill the bacteria that produce the acidAnswer: B. prevent histamine from binding to the H₂ receptors, so less HCl is released
Explanation: These H₂-receptor antagonists cut off the signal that stimulates acid secretion, so they treat the cause instead of merely neutralising acid already formed.
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Start this chapter free →Chemistry in Everyday Life — FAQs
What are the key concepts in Class 11 Chemistry Chemistry in Everyday Life?+
This chapter shows chemistry doing everyday work: curing disease, keeping food edible and getting clothes clean. It begins with drugs, defined as low molar mass chemicals that interact with a biological target, and the four ways of classifying them — by pharmacological effect, by drug action, by chemical structure and by molecular target. It then explains how a drug actually works, either by inhibiting an enzyme at its active or allosteric site or by acting as an agonist or antagonist at a receptor, and surveys the main therapeutic classes: antacids, antihistamines, tranquilisers, narcotic and non-narcotic analgesics, antimicrobials, antiseptics, disinfectants and antifertility drugs. The last two sections deal with chemicals added to food — artificial sweeteners, preservatives and antioxidants — and with cleansing agents, covering the saponification of oils to soap, the three families of synthetic detergents and the problem of biodegradability. Key ideas include Drug and medicine, Four ways of classifying drugs, Enzymes as drug targets, Receptors, agonists and antagonists.
What does Class 11 Chemistry Chapter 308 (Chemistry in Everyday Life) cover on XamBaaz?+
It has 40 NCERT-based MCQs on "Chemistry in Everyday Life": 20 Easy and 20 Medium. Together they make 4 timed quizzes, and you never get the same set twice. Every question has an instant explanation. They help you prepare for CBSE & Maharashtra HSC Board exams, JEE Main, MHT-CET, JEE Advanced and NEET UG.
Are these "Chemistry in Everyday Life" questions free to practise?+
Yes. Sign in with Google to practise "Chemistry in Everyday Life" free. Full unlimited access is ₹999/year on a launch offer until 1 December 2026. No chapter is charged separately.
How should I revise "Chemistry in Everyday Life" for the exam?+
Start with the Easy quiz to check your basics, then try Medium to practise applying them. There are 4 timed quizzes on this chapter, so you can come back for a fresh set instead of one you have seen. Read each explanation, retry the questions you miss, and track your accuracy until it stays high.
Are these "Chemistry in Everyday Life" MCQs available with answers?+
Yes. 6 sample questions are shown here in full, each with the correct option and a step-by-step "Why" explanation. Sign in free with Google to start practising, with instant scoring.
Is there negative marking in the "Chemistry in Everyday Life" quizzes?+
Yes. The timed quizzes use exam-style marking: +4 for a right answer, −1 for a wrong one and 0 for a skip, the same negative marking as JEE Main, JEE Advanced and NEET UG. MHT-CET and CBSE board papers have no negative marking. Our mocks for those are scored their way.
What are the important questions from Chemistry in Everyday Life (Class 11 Chemistry)?+
The questions that matter most test Drug and medicine, Four ways of classifying drugs, Enzymes as drug targets, Receptors, agonists and antagonists. This page shows 6 solved important MCQs with answers and explanations; all 40 questions on the chapter are available as timed quizzes once you sign in.
Is there an online quiz for Chemistry in Everyday Life?+
Yes — Class 11 Chemistry Chemistry in Everyday Life has timed online quizzes at Easy and Medium levels, with instant scoring and a worked explanation on every question. The first quiz on the chapter is free.