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CUET UG Chemistry Flashcards
78 question-and-answer cards covering Chemistry as it is examined in CUET UG. 24 of them are printed below, taken from across the deck — no signup, no paywall on the preview.
24 sample cards from the Chemistry deck
Sampled from the end of the deck, so these are different cards from the ones shown on the syllabus page.
What is the Cannizzaro reaction?
A self-redox (disproportionation) reaction of aldehydes without α-hydrogen with concentrated alkali, giving an alcohol and a carboxylate salt (e.g. 2HCHO → CH₃OH + HCOO⁻).
Why are carboxylic acids more acidic than phenols and alcohols?
Because the carboxylate ion is stabilised by resonance over two equivalent oxygen atoms (delocalised negative charge), making it more stable than phenoxide or alkoxide ions.
Arrange the basic strength of amines in the gas phase vs aqueous solution for ethyl amines.
Gas phase (only inductive): 3° > 2° > 1° > NH₃. In aqueous solution (inductive + solvation + steric): for ethyl, 2° > 1° > 3° > NH₃ (order varies due to solvation/steric effects).
Why are aromatic amines (aniline) less basic than aliphatic amines?
Because the lone pair on N is delocalised into the benzene ring by resonance, making it less available for protonation; aniline is therefore a weaker base than ammonia/aliphatic amines.
What is the carbylamine (isocyanide) test and what does it detect?
Primary amines (and ammonia derivatives) heated with chloroform and alcoholic KOH give foul-smelling isocyanides (carbylamines): R–NH₂ + CHCl₃ + 3KOH → R–NC + 3KCl + 3H₂O. It is a test for 1° amines only.
Describe the diazotisation reaction and a use of the diazonium salt.
Primary aromatic amine + NaNO₂/HCl at 0–5°C gives an arenediazonium salt (Ar–N₂⁺Cl⁻). It is used in coupling reactions to make azo dyes and in Sandmeyer reactions to introduce –Cl, –Br, –CN.
What is Hoffmann bromamide degradation and the change in carbon count?
An amide reacts with Br₂ and NaOH (aq.) to give a primary amine with one fewer carbon atom: R–CONH₂ → R–NH₂ + CO₃²⁻ (chain shortened by one C).
Classify monosaccharides and give examples of an aldose and a ketose.
Monosaccharides are classified by carbonyl group as aldoses (contain –CHO, e.g. glucose) or ketoses (contain C=O ketone, e.g. fructose), and by number of carbons (triose, pentose, hexose etc.).
Name the glycosidic linkage in sucrose, maltose, and lactose.
Sucrose: α-glucose + β-fructose via C1–C2 glycosidic linkage (non-reducing). Maltose: two α-glucose units, C1–C4. Lactose: β-galactose + glucose, C1–C4.
Distinguish starch and cellulose in terms of linkage.
Starch is a polymer of α-glucose (amylose: α-1,4; amylopectin: α-1,4 + α-1,6 branches). Cellulose is a linear polymer of β-glucose joined by β-1,4 glycosidic linkages.
What is a zwitterion and the isoelectric point of an amino acid?
A zwitterion is the dipolar form of an amino acid having both –NH₃⁺ and –COO⁻ groups. The isoelectric point is the pH at which the amino acid exists mainly as a neutral zwitterion (no net migration in an electric field).
Differentiate the primary and secondary structures of proteins.
Primary structure = the specific sequence of amino acids linked by peptide bonds. Secondary structure = local folding into α-helix or β-pleated sheet, stabilised by hydrogen bonds.
What is the difference between DNA and RNA in sugar, bases, and structure?
DNA has deoxyribose sugar, bases A,T,G,C, and is double-stranded. RNA has ribose sugar, bases A,U,G,C, and is usually single-stranded. (Thymine in DNA is replaced by Uracil in RNA.)
State the base-pairing rule in DNA (Chargaff/complementary pairing).
Adenine pairs with Thymine (A=T, two H-bonds) and Guanine pairs with Cytosine (G≡C, three H-bonds). In RNA, Adenine pairs with Uracil.
Distinguish addition and condensation polymers with one example each.
Addition polymers form by repeated addition of monomers with no loss of small molecules (e.g. polythene from ethene). Condensation polymers form with elimination of small molecules like H₂O (e.g. nylon-6,6, terylene).
Identify the monomers of nylon-6,6 and terylene (Dacron).
Nylon-6,6: adipic acid + hexamethylenediamine. Terylene/Dacron: terephthalic acid + ethylene glycol (polyester).
What is natural rubber's monomer, and what is vulcanisation?
Natural rubber is cis-1,4-polyisoprene (monomer = isoprene, 2-methyl-1,3-butadiene). Vulcanisation is heating rubber with sulphur to form cross-links, increasing strength and elasticity.
Classify polymers as elastomers, fibres, and thermoplastics with one example each.
Elastomers: weak intermolecular forces, elastic (e.g. buna-S, natural rubber). Fibres: strong forces/H-bonding (e.g. nylon, terylene). Thermoplastics: intermediate forces, soften on heating (e.g. polythene, PVC).
What is a biodegradable polymer? Give an example.
A polymer that decomposes naturally by microbial action over time. Example: PHBV (poly-β-hydroxybutyrate-co-β-hydroxyvalerate) and Nylon-2-nylon-6.
How do antacids and antihistamines work, with one example each?
Antacids neutralise excess stomach acid (e.g. ranitidine/Zantac, magnesium hydroxide). Antihistamines block H₁ receptors to relieve allergy symptoms (e.g. cetirizine, terfenadine, brompheniramine).
Distinguish antiseptics and disinfectants with examples.
Antiseptics are applied to living tissue to kill/prevent microbial growth (e.g. dettol, savlon, 0.2% phenol). Disinfectants are applied to non-living objects (e.g. 1% phenol, chlorine in water). The same substance can be either depending on concentration.
What are cationic, anionic, and non-ionic detergents? Give one example of each.
Cationic: quaternary ammonium salts (e.g. cetyltrimethylammonium bromide). Anionic: sodium alkylbenzene sulphonates / sodium lauryl sulphate. Non-ionic: esters of polyethylene glycol (no ionic charge).
Name two artificial sweeteners and an example of an antioxidant food additive.
Artificial sweeteners: aspartame, saccharin, sucralose, alitame. Antioxidant food additives: BHT (butylated hydroxytoluene) and BHA (butylated hydroxyanisole).
What are broad-spectrum and narrow-spectrum antibiotics? Give an example of each.
Broad-spectrum antibiotics kill a wide range of microbes (e.g. chloramphenicol, ampicillin, tetracycline). Narrow-spectrum antibiotics act against a few microbes (e.g. penicillin G).
What this deck covers
The Chemistry deck follows the CUET UG Chemistry syllabus — 4 chapters and 13 topics — so questions land on material that is genuinely examinable rather than trivia around it. That works out to roughly 19.5 cards per chapter.
Answers are written to be recallable, not just readable — averaging about 181 characters, which is long enough to carry the reasoning and short enough to say out loud.
A deck like this earns its keep on the second and third pass. Read the syllabus first so you know the shape of the subject, then use the cards to find the specific facts that have not stuck.
Chemistry flashcards FAQ
How many Chemistry flashcards are in this CUET UG deck?
78 cards. This page previews 24 of them, sampled evenly across the deck so you can judge the difficulty before installing anything.
Are these CUET UG flashcards free?
Yes. The preview here is free to read with no signup, and the full 78-card deck is free inside the Examius app.
What do the Chemistry cards cover?
They follow the CUET UG Chemistry syllabus — 4 chapters and 13 topics — so the questions track what is actually examinable.
How should I use these flashcards?
Read the syllabus first so you know the shape of the subject, then drill the deck. Examius schedules each card with spaced repetition, so cards you keep missing come back sooner and ones you know drift further apart.