TMA3/CHM102

My TMA Home TMA Results My Pending TMA Quick Help TMA Quiz Questions TMA: TMA3/CHM102 SCORE=9.50 CHM102 - INTRODUCTORY PHYSICAL CHEMISTRY Dr. Aletan Uduak (ualetan@noun.edu.ng ) 1 Alkynes react with chlorine and bromine to yield _____________. trihaloalkanes tetrahaloalkanes dihydroalkanes haloalkanes 2 In the absence of a poison, catalytic hydrogenation of an alkyne gives the __________. alkene benzene haloalkane alkane 3 The double bond in alkene is converted into ___________by means of peracids. ethoxide ethyne ether epoxide 4 The most popular reagent used to convert an alkene to diol is cold alkaline aqueous of ______________or osmium tetroxide. sodium permanganate magnesium permanganate potassium permanganate None of the above 5 Alkenes are readily hydroxylated (addition of hydroxyl groups) to form a dihydroxy compound (diol) known as ____________.  glycols enols phenol ketone 6 Hydrogenation of an alkene can be carried out by using nickel catalyst but relatively higher temperature and pressure are required for this reaction,this reaction is called ________reaction. Catalytic Fischer-Tropsch Sabatier Senderen’s Bergius 7 Alkanes can also be prepared by the ____________ of alkyl halides esterification carboxylation oxidation reduction 8 The direct decarboxylation of a carboxylic acid can be carried out by heating it with an organic base, such as pyridine using___________ as catalyst  copperchromite nickel platinium palladium 9 The molecular rearrangement of one compound into another compound or into more than one compound is called ____________. halogenation Nitration Isomerisation Esterification 10 __________ involves elimination of the halogen atom together with a hydrogen atom from an adjacent carbon atom. Halogenation Hydrohalogenation Hydrogenation Dehydrohalogenation 11 In the ___________hydrocarbons, the carbon atoms are linked to each other to form chains (straight of branched). Alicyclic Aliphatic Aromatic Unsaturated 12 The saturated hydrocarbons contain the carbon and hydrogen atoms linked to each other by single bonds and are called ______________. Alkanes Alkenes Alkynes Aromatic 13 The _____________ provide a backbone to which various functional groups may be attached to yield an enormous variety of organic compounds. Isomers Structural formula Bonds Hydrocarbons 14 _____________are the compounds that have identical molecular formulas but differ in the ways in which the atoms are bonded to each other. Alkenes Alkanes Isomers Monomers 15 Hydrocarbons which contains at least ______ benzene ring in their structure is called an aromatic hydrocarbon 2 1 4 3 16 Wittig reaction is applicable to __________.  Benzene Carbonyl compounds Alcohols Alkyl halides 17 What is the main component of natural gas? ethane propane ethene methane 18 Organic compounds are separated into groups called homologous series. Which one of the following is not a property of a homologous series? All members have the same general formula. They have similar physical properties. Successive members differ by CH2. They have similar chemical properties. 19 Hydroboration can be described as __________. Hund's addition Sayzeff addition Anti markownikoffs addition Markownikoffs addition 20 ________ is the process where finely powdered coal is hydrogenated in presence of catalyst such as tin and lead to give a mixture of liquid hydorcarbons. bergius process fischer-tropoch pyrolysis None of the above