TMA4/CHM102

My TMA Home TMA Results My Pending TMA Quick Help TMA Quiz Questions TMA: TMA4/CHM102 SCORE=10.00 CHM102 - INTRODUCTORY PHYSICAL CHEMISTRY Dr. Aletan Uduak (ualetan@noun.edu.ng ) 1 ____________is a cleavage reaction, i.e a reaction in which the double bond is completely broken and alkene molecule is converted into two smaller molecules. Ozonolysis Pyrolysis Chelation Carbonification 2 Treatment of organoboranes with a carboxylic acid leads to___________. Alkynes Alkane Boronc acid Phenolic acid 3 When an alkene reacts with borane, addition to the carbon-carbon double bond takes place to yield an ______________. metallo borane hydroborane organoborane dihydroborane 4 Synthetically, alkenes are prepared by introducing a double bond in saturated hydrocarbons through _____________of atoms or groups from two adjacent carbon atoms. substitution  elimination addition Oxidation 5 Which of the following statements regarding alkanes is not true Alkanes are non-polar molecules Alkanes are soluble in water Alkanes experience dispersion forces Alkanes have low boiling points 6 _______________reaction is applicable to aldehyde andketones and leads to replacement of carbonyl oxygen by the group=CRR’ (where R and R’ are hydrogen or alkyl group). Wittig Wurtz Sabatier Senderen’s Fischer-Tropsch 7 In __________ reactions of alkene, the pie -bond is broken and the electron pair comprising it, is used in the formation of two new sigma bonds. Substitution Addition Elimination Oxidation 8 Dehydrohalogenation follows ____________ rule which says that the more highly substituted alkene is the dominant product. Markinowoffs Clemmensons Saytzeff Fischer 9 In ____________ reaction, a conjugated diene is treated with an unsaturated compound called the dienophile (diene-lover) to yield, a cyclic system. Diels-Alder Retro Diels-Alder Wittig Wurtz 10 ______________ rule, which states that addition of a hydrogen halide to an unsymmetrical alkene takes place in such a way that the negative part of the reagent goes to that carbon atom of the alkene which carries the lesser number of hydrogen atoms. Saytzeff Fischer Clemmensons Markinowoffs 11 In theIUPAC system of nomenclature, aldehydes are named as _________________. Ethers Alkanals Alcohols Ketones 12 The reaction of propane with bromine is called? Elimination Addition Halogenation Oxidation 13 The functional group contained in the compound CH2=CH2 is an ether ester alkene alkane 14 The molecular formula of __________ fit the general formula (CnH2n-2). Alkynes alkanes alchohols alkenes 15 Terminal alkynes on hydroboration give _________. Alkanes Ketones Alkyl halides Aldehydes 16 The following are methods of preparation of acetylene EXCEPT ___________. Acylation of ethyne Alkylation of ethyne  Dehydrohalogenation of dihalides  Dehalogenation of tetrahalide 17 The lobes of Sp3$$S{p}^3$$ are separated by ________ Orbital Node Antinode None of the above 18 The number of hybrid orbitals generated is determined by __________ combined.  Number of shells Number of protons Number of atomic orbitals Number of electrons 19 The catalyst required for the hydrogenation of unsaturated hydrocarbons at moderate temperature and pressure is__________ Palladium Nickel Vanadium v Oxide Iron 20 1-hexyne can itself be converted into an alkynide anion, and can be alkylated a second time to yield an __________ alkyne. interim internal terminal external