TMA2/CHM102

My TMA Home TMA Results My Pending TMA Quick Help TMA Quiz Questions TMA: TMA2/CHM102 Matric Number:  SCORE=9.00 CHM102 - INTRODUCTORY PHYSICAL CHEMISTRY Dr. Aletan Uduak (ualetan@noun.edu.ng ) 1 A catalyst mixed with a selective inhibiting agent is called a___________ catalyst. poisoned enzymatic biological chemical 2 ____________ reaction is a reaction which yields predominantly one isomer. Enzymatic Electrolytic Stereoselective Oxidation 3 A radical __________has one centre with a negative charge and another, with an unpaired electron. cation ion  anion proton 4 The ozonides on hydrolysis give ____________ compounds, which undergo oxidative cleavage to carboxylic acids by hydrogen peroxide formed in the reaction.  1, 2-dicarbonyl carbonyl alkynl aryl 5 Addition of borane to alkynes gives __________, which can be oxidised by basic hydrogen peroxide to ketones via their enol. boranes phenyl boranes benzyl boranes alkenyl boranes 6 Boiling point of a covalent substance depends upon the ______________ forces. Electrovalent Electrostatic Vander waals Intermolecular 7 Alkanes are soluble in ____________ solvents Polar Viscous Dipolar Nonpolar 8 ____________ reaction is suitable for the preparation of only those alkanes which contain an even number of carbon atoms Kolbe's electrolytic Wurtz Hydrogenation Halogenation 9 When a concentrated solution of sodium or potassium salt of a carboxylic acid is electrolysed, an alkane is formed,the method is known as ___________method. Fischer-Tropsch Bergius Kolbe’s electrolytic Electrolytic 10 Alkanes or cycloalknes can be prepared by ___________ of unsaturated hydrocarbons using platinum or palladium as a catalysts. Hydrogenation Halogenation Dehydrogenation Decarboxylation 11 The hybrid orbitals are obtained by mathematical combinations of __________________. Molecular orbitals Ionic orbitals Electrons Atomic orbitals 12 One of these statements is not true. σ(sigma) bonds are formed by the edge-on overlap of pure (s and p) or hybrid orbitals. The electron density in σ (sigma)bonds is maximum along the internuclear axis. π (pi)bonds are formed by sideways overlap of p orbitals. π (pi)bonds have maximum electron density along the internuclear axis. 13 Acetylene is a _________ molecule having cylindrically symmetrical π (pi) electron density about the internuclear axis. bent tetrahedral linear trigonal planar 14 An alkane with 7 carbon atoms contains _____ hydrogen atoms. 16 14 20 18 15 A ____________can be defined as an atom or a group of atoms in a molecule which exhibits characteristic chemical properties. Isomeric group Structural group Fucntional group Hybridized group 16 The first product in fractionation of petroleum is called _________. Gasoline Natural gas Light petrol Paraffin 17 Increase in number of carbon atoms results in the following effects EXCEPT ________. Surface area increases Boiling point increases  Melting point increases Intermolecular forces increases 18 A catalyst mixed with a selective inhibiting agent is called ________ catalyst. Acidic Basic Neutral poisoned 19 The hydrohalogenation of alkynes is in accordance with ________. Hund's rule Sayzeff rule Markownikoffs rule Anti markownikoffs rule 20 A reaction in which the double bond is completely broken and alkene molecule is converted into two smaller molecules is called _______. Hydroxylation  Epoxilation  Ozonolysis Hydroboration