TMA

TMA2/CHM102 – INTRODUCTORY PHYSICAL CHEMISTRY

TMA Quiz Questions

TMA: TMA2/CHM102
CHM102 – INTRODUCTORY PHYSICAL CHEMISTRY
Dr. Aletan Uduak (ualetan@noun.edu.ng )

 
1 A catalyst mixed with a selective inhibiting agent is called a___________ catalyst.

A. poisoned  
B. enzymatic
C. biological
D. chemical

2 ____________ reaction is a reaction which yields predominantly one isomer.

A. Enzymatic
B. Electrolytic
C. Stereoselective  
D. Oxidation

3 A radical __________has one centre with a negative charge and another, with an unpaired electron.

A. cation
B. ion
C. anion  
D. proton

4 The ozonides on hydrolysis give ____________ compounds, which undergo oxidative cleavage to carboxylic acids by hydrogen peroxide formed in the reaction.

A. 1, 2-dicarbonyl  
B. carbonyl
C. alkynl
D. aryl

5 Addition of borane to alkynes gives __________, which can be oxidised by basic hydrogen peroxide to ketones via their enol.

A. boranes
B. phenyl boranes
C. benzyl boranes
D. alkenyl boranes  

6 Boiling point of a covalent substance depends upon the ______________ forces.

A. Electrovalent
B. Electrostatic
C. Vander waals
D. Intermolecular  

7 Alkanes are soluble in ____________ solvents

A. Polar
B. Viscous
C. Dipolar
D. Nonpolar  

8 ____________ reaction is suitable for the preparation of only those alkanes which contain an even number of carbon atoms

A. Kolbe’s electrolytic
B. Wurtz  
C. Hydrogenation
D. 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.

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A. Fischer-Tropsch
B. Bergius
C. Kolbe’s electrolytic  
D. Electrolytic

10 Alkanes or cycloalknes can be prepared by ___________ of unsaturated hydrocarbons using platinum or palladium as a catalysts.

A. Hydrogenation  
B. Halogenation
C. Dehydrogenation
D. Decarboxylation

11 The hybrid orbitals are obtained by mathematical combinations of __________________.

A. Molecular orbitals
B. Ionic orbitals
C. Electrons
D. Atomic orbitals  

12 One of these statements is not true.

A. σ(sigma) bonds are formed by the edge-on overlap of pure (s and p) or hybrid orbitals.
B. The electron density in σ (sigma)bonds is maximum along the internuclear axis.
C. π (pi)bonds are formed by sideways overlap of p orbitals.
D. 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.

A. bent
B. tetrahedral
C. linear  
D. trigonal planar

14 An alkane with 7 carbon atoms contains _____ hydrogen atoms.

A. 16  
B. 14
C. 20
D. 18

15 A ____________can be defined as an atom or a group of atoms in a molecule which exhibits characteristic chemical properties.

A. Isomeric group
B. Structural group
C. Fucntional group  
D. Hybridized group

16 The first product in fractionation of petroleum is called _________.

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A. Gasoline
B. Natural gas  
C. Light petrol
D. Paraffin

17 Increase in number of carbon atoms results in the following effects EXCEPT ________.

A. Surface area increases
B. Boiling point increases
C. Melting point increases
D. Intermolecular forces increases  

18 A catalyst mixed with a selective inhibiting agent is called ________ catalyst.

A. Acidic
B. Basic  
C. Neutral
D. poisoned

19 The hydrohalogenation of alkynes is in accordance with ________.

A. Hund’s rule
C. Sayzeff rule
D. Markownikoffs rule  
E. 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 _______.

A. Hydroxylation  
B. Epoxilation
C. Ozonolysis
D. Hydroboration

 

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