Organic Chemistry Answers

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

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.

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

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

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

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

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

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

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

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