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Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium.
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Explain why Lewis acid is not required in bromination of phenol?
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How can phenol be converted to aspirin?
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Three cyclic structures of monosaccharides are given below which of these are anomers.
| (I) |  |
| (II) |  |
| (III) |  |
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Structure of a disaccharide formed by glucose and fructose is given below. Identify anomeric carbon atoms in monosaccharide units.
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Which of the following monosaccharides are present as five membered cyclic structure (furanose structure)?
(i) Ribose
(ii) Glucose
(iii) Fructose
(iv) Galactose
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Name the sugar present in milk. How many monosaccharide units are present in it? What are such oligosaccharides called?
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Name the linkage connecting monosaccharide units in polysaccharides.
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Monosaccharides contain carbonyl group hence are classified, as aldose or ketose. The number of carbon atoms present in the monosaccharide molecule are also considered for classification. In which class of monosaccharide will you place fructose?
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What are glycosidic linkages? In which type of biomolecules are they present?
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Which monosaccharide units are present in starch, cellulose and glucose and which linkages link these units?
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Assertion: Deoxyribose, \[\ce{C5H10O4}\] is not a carbohydrate.
Reason: Carbohydrates are hydrates of carbon so compounds which follow \[\ce{C_x(H2O)_y}\] formula are carbohydrates.
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A natural linear polymer of 2-methyl-1, 3-butadiene becomes hard on treatment with sulphur between 373 to 415 K and – S – S – bonds are formed between chains. Write the structure of the product of this treatment?
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Identify the type of polymer given in the following figure.
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To have practical applications why are cross links required in rubber?
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Why does cis-polyisoprene possess elastic property?
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What is the structural difference between HDP and LDP? How does the structure account for different behaviour and nature, hence the use of a polymer?
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Assertion: Network polymers are thermosetting.
Reason: Network polymers have high molecular mass.
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Which is the correct statement about birth control pills?
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