TMA1/CHM102

My TMA Home TMA Results My Pending TMA Quick Help TMA Quiz Questions TMA: TMA1/CHM102   SCORE=10.00 CHM102 - INTRODUCTORY PHYSICAL CHEMISTRY Dr. Aletan Uduak (ualetan@noun.edu.ng ) 1 ______________, also known as acetylenes, constitute the homogenous series of open chain unsaturated hydrocarbons that contain one or more carbon-carbon triple bond. Alkynes Alkenes Benzene Alkanes 2 In the __________ alkynes, the triple bond lies at the end of the carbon chain. Internal external terminal interim 3 Reactions that lead to the attachment of an alkyl group to a molecular fragment are called ____________. dealkylation esterification carboxylation  alkylation 4 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 5 Addition of ethyne to sodamide in ether yields ammonia and _____________. potassium ethynide sodium ethynide. ethynide None of the above 6 Aromatic compounds containing heteroatoms such as O, N or S in the aromatic ring are called ____________ compounds. Homocyclic Monocyclic Unsaturated Heterocyclic 7 One of these statements is true The bond length for the F-F bond is 140 bond length decreases with the decrease in multiplicity of the bond. Bond dissociation energy is another term for bond energy bond lengths increase with the increasing size of the bonded atoms, 8 ______________are the compounds having hydroxyl (-OH) group attached to the alkyl chain. Esters Alcohols Ethers Alkynes 9 _______________ are saturated aliphatic hydrocarbons. Alkanes Alkenes Alkynes Benzene 10 In ____________ process, finely powdered coal is hydrogenated in presence of catalysts, such as tin and lead to give a mixture of liquidhydrocarbons. Fischer-Tropsch Diels-Alder Bergius None of the above 11 The sharing of electrons to form a covalent bond leads to an increase in electron density in between the _____________________. Atom Electron Nuclei Orbital 12 The amount of energy required to break a particular bond is called its bond _____________. Dissociation energy Association energy Bond energy Kinetic energy 13 There are two more parameters associated with a covalent bond which determine the shape of a molecule and are known as ____________________. Bond energy,Bond width Bond diameter,Bond radius Bond strenght,Bond circumference Bond length,Bond angle 14 ____________ can be defined as the average distance between the nuclei of the atoms which are covalently bound together. Bond angle Bond length Bond strenght Bond width 15 The _____________ of a compound is its Lewis structure, which shows how various atoms are connected to each other. Iupac nomenchlature Structural formula Isomeric structure Bond hybridization 16 All these are methods of preparation of alkenes EXCEPT _________ reaction method Retro Diels-Alder Dehydration of alcohols Wittig  Cannizaro 17 Formic acid is now known as Oxalic acid Methanoic acid Ethanoic acid Propenoic acid 18 The addition of ozone to an alkyne produces _________.  Ozonide ozonede Ozonade None of the above 19 The reaction between an alkyl halide and sodium metal to form an alkane is called _______ reaction. Wittig Diels-Alder  Kolbe Wurtz 20 A benzene ring with a methyl group at position one and nitro group at position three is _________ p nitrotoluene p nitroxylen o nitrobenzene o nitroaniline