Account for the following:(i) The C – Cl bond length in chlorobenzene is shorter than that in CH3 – Cl.(ii) Chloroform is stored in closed dark brown bottles.
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Account for the following:
(i) The C – Cl bond length in chlorobenzene is shorter than that in CH3 – Cl.
(ii) Chloroform is stored in closed dark brown bottles.
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- This question is about the chemistry of alkenes, which are unsaturated hydrocarbons. (a) State what is meant by the term unsaturated as applied to a hydrocarbon. (1) (b) An organic compound, X, is an unsaturated hydrocarbon with molecular formula CH₂. (i) Draw the displayed formulae and give the names of two molecules with molecular formula C₂H, which are E/Z isomers. (3) Isomer 1 Isomer 2 Name: Name:MTBE, Methyl tert-butyl ether, CH3OC(CH3)3, is used as an oxygen source in oxygenated gasolines. MTBE is manufactured by reacting 2-methylpropene with methanol.(a) Using Lewis structures, write the chemical equation representing the reaction.(b) What volume of methanol, density 0.7915 g/mL, is required to produce exactly 1000 kg of MTBE, assuming a 100% yield?Octane 1C8H182 is a liquid hydrocarbon at room temperature that is a constituent of gasoline. (a) Write a balanced equation for the combustion of C8H181l2 to form CO21g2 and H2O1l2.
- Write the chemical formula and Lewis structure of the following, each of which contains five carbon atoms:(a) an alkane(b) an alkene(c) an alkyneWrite Lewis structures and describe the molecular geometry at each carbon atom in the following compounds:(a) cis-3-hexene(b) cis-1-chloro-2-bromoethene(c) 2-pentyne(d) trans-6-ethyl-7-methyl-2-octeneGive chemical tests to distinguish between the following pairs of compounds :(a) Benzyl chloride and Chlorobenzene(b) Chloroform and Carbon tetrachloride
- (a) Calculate the standard enthalpy change for the combustion of 1 mol of benzene, C6H61l2, to CO21g2 and H2O1l2.(b) Compare the quantity of heat produced by combustion of 1.00 g propane with that produced by 1.00 g benzene.(a) What structural feature is associated with each type of hydrocarbon: alkane, cycloalkane, alkene, and alkyne?(b) Give the general formula for each type.(c) Which hydrocarbons are considered saturated?(a) (b) Define the terms 'functional group' and 'unsaturated hydrocarbon'. Name the following organic compounds: i. ii. (c) Draw skeleton structures for the following organic compounds: i. 3,4-dimethylheptane 3-methylheptanal ii. OH (d) The following two organic compounds are structural isomers to each other. Carefully identify and justify the structural isomers type (skeletal, functional, or positional) with their common molecular formula. HO O HO nos. A B
- (a) When a compound containing C, H, and O is completelycombusted in air, what reactant besides the hydrocarbonis involved in the reaction? (b) What products form in thisreaction? (c) What is the sum of the coefficients in the balancedchemical equation for the combustion of one mole ofacetone, C3H6O1l2, in air?(a) What is the difference between chlorofluorocarbons and hydrofluorocarbons?Identify the intermolecular forces (dipole–dipole, London dispersion, ydrogen bonding) that influence the properties of the following compounds: (a) Ethane, CH3CH3(b) Ethanol, CH3CH2OH(c) Chloroethane, CH3CH2Cl