CHEMISTRY CLASS TEST

CHEMISTRY CLASS TEST TOPIC: ORGANIC FUNCTIONAL GROUP I, II , CHEMISTRY IN ACTION AND BIOMOLECULES ORGANIC FUNCTIONAL GROUP I 20 MARKS 1 Among the isomeric alkanes of molecular formula C5H12, identify the one that on photochemical chlorination yields (i) A single monochloride. (ii) Three isomeric monochlorides. (iii) Four isomeric monochlorides. 2 Draw the structures of major monohalo products in each of the following reactions: (i) (ii) (iii) (iv) (v) (vi) 3 Which alkyl halide from the following pairs would you expect to react more rapidly by an SN2 mechanism? Explain your answer. (i) (ii) (iii) 4 Identify A, B, C, D, E, R and R1 in the following: 5 A hydrocarbon C5H10 does not react with chlorine in dark but gives a single monochloro compound C5H9Cl in bright sunlight. Identify the hydrocarbon. 6 Write the equations for the preparation of 1−iodobutane from (i) 1-butanol (ii) 1-chlorobutane (iii) but-1-ene. 7 Explain why (i) the dipole moment of chlorobenzene is lower than that of cyclohexyl chloride? (ii) alkyl halides, though polar, are immiscible with water? (iii) Grignard reagents should be prepared under anhydrous conditions 8 Write the structure of the major organic product in each of the following reactions: (i) (ii) (iii) (iv) (v) (vi) 9 Arrange the compounds of each set in order of reactivity towards SN2 displacement: (i) 2-Bromo-2-methylbutane, 1-Bromopentane, 2-Bromopentane (ii) 1-Bromo-3-methylbutane, 2-Bromo-2-methylbutane, 3-Bromo-2- methylbutane (iii) 1-Bromobutane, 1-Bromo-2,2-dimethylpropane, 1-Bromo-2-methylbutane, 1-Bromo-3-methylbutane 10 How the following conversions can be carried out? (i) Propene to propan-1-ol (ii) Ethanol to but-1-yne (iii) 1-Bromopropane to 2-bromopropane (iv) Toluene to benzyl alcohol (v) Benzene to 4-bromonitrobenzene (vi) Benzyl alcohol to 2-phenylethanoic acid ORGANIC FUNCTIONAL GROUP II 1 Name the following compounds according to IUPAC system. (i) (ii) (iii) 2 Show how are the following alcohols prepared by the reaction of a suitable Grignard reagent on methanal? (i) (ii) 3 Write structures of the products of the following reactions: (i) (ii) (iii) 4 Write the equations involved in the following reactions: (i) Reimer-Tiemann reaction (ii) Kolbe’s reaction 5 Predict the products of the following reactions: (i) (ii) (iii) (iv) 6 What is meant by hydroboration-oxidation reaction? Illustrate it with an example 7 While separating a mixture of ortho and para nitrophenols by steam distillation, name the isomer which will be steam volatile. Give reason. 8 Show how will you synthesize: (i) 1-phenylethanol from a suitable alkene. (ii) cyclohexylmethanol using an alkyl halide by an SN2 reaction. (iii) pentan-1-ol using a suitable alkyl halide? 9 Give equations of the following reactions: (i) Oxidation of propan-1-ol with alkaline KMnO4 solution. (ii) Bromine in CS2 with phenol. (iii) Dilute HNO3 with phenol.(iv) Treating phenol with chloroform presence of aqueous NaOH 10 Explain the following with an example. (i) Kolbe’s reaction. (ii) Reimer-Tiemann reaction. (iii) Williamson ether synthesis. (iv) Unsymmetrical ether CHEMISTRY IN ACTION 1 Why do we need to classify drugs in different ways? 2 What is meant by the term ‘broad spectrum antibiotics’? Explain 3 How do antiseptics differ from disinfectants? Give one example of each. 4 What are the main constituents of dettol? 5 Explain the following terms with suitable examples (i) Cationic detergents (ii) Anionic detergents and (iii) Non-ionic detergents BIOMOLECULES 1 Glucose or sucrose are soluble in water but cyclohexane or benzene (simple six membered ring compounds) are insoluble in water. Explain. 2 Where does the water present in the egg go after boiling the egg? 3 What happens when D-glucose is treated with the following reagents? (i) HI (ii) Bromine water (iii) HNO3 4 Define the following as related to proteins (i) Peptide linkage (ii) Primary structure (iii) Denaturation 5 Differentiate between globular and fibrous proteins. 6 How are vitamins classified? Name the vitamin responsible for the coagulation of blood 7 What is the difference between a nucleoside and a nucleotide?