Organic Chemistry Answers

Question 1 : _______is an example of Isolated Benzenoid Hydrocarbon.
Phenanthrene
Anthracene
Biphenyl
Naphthalene

Question 2 : Down the group, electronegativity ------------------.
None of the above
Increases
Decreases
Neutral

Question 3 : A compound in which a halogen atom is attached to another carbon atom by a double bond is called -----.
Vinyl halide
Alkyl halide
Vicinal dihalides
Geminal dihalides

Question 4 : All these affect boiling points except __________.
Polarity
Shape of molecule
Molecular structure
London forces

Question 5 : Geometric isomerism yields __________isomers
Four
Two
Three
Five

Question 17 : Another name for methyl benzene is __________.
Naphthalene
Toluene
Xylene
Phenol

Question 18 : Chlorination of ethene at high temperature yields ---------.
Chloroethyne
13-dichloroethene
Chloroethene
12-dichloroethene

Question 19 : 2-methylpropane will have ________than butane.
lower saturation point
lower boiling point
lower melting point
lower due point

Question 20 : In the hydrogenation of benzene,the condition for reaction is ______.
Ni 525-625K 25atm
Ni 425-525K 25atm
Fe 425-525K 25atm
Fe 525-625K 25atm

Question 13 : A compound in which a halogen atom is attached to another carbon atom by a double bond is called -----.
Geminal dihalides
Vinyl halide
Alkyl halide
Vicinal dihalides

Question 14 : A substance which ionises to produce hydroxide ions is called __________.
Salt
Acid
None of the above
Base

Question 15 : Induced dipole - induced dipole interactions are also called __________.
Van der Waal forces
Hydrogen bonding
London forces
Dipole -dipole interactions

Question 16 : All these are electron donating groups with respect to reactivity and orientation EXCEPT _______

−OR


−CN


−OH


−NHCOR

Question 8 : Hydrogenation of benzene at higher temperature and under pressure yields -------
Cyclohexene
Cyclohexyne
Cyclohexane
Benzaldehyde

Question 9 : A functional group that introduces polarity leads to __________ in the molecule.
increase melting point
Permanent dipole moment
increase saturation point
increase boiling point

Question 10 : A chief source of benzene and its derivatives is __________.
Coaltar
Basalt
Bitumen
Limestone

Question 11 : All these affect boiling points except __________.
Shape of molecule
London forces
Molecular structure
Polarity

Question 12 : Among isomeric molecules, the linear isomer is ________.
Polar isomer
Unbranched isomer
non-polar isomer
Branched isomer

Question 3 : A benzene ring is a ________ system.
non conjugation
Conjugation
Hyperconjugation
None

Question 4 : All these affect boiling points except __________.
Molecular structure
London forces
Shape of molecule
Polarity

Question 5 : A chief source of benzene and its derivatives is __________.
Basalt
Limestone
Coaltar
Bitumen

Question 6 : Geometric isomerism yields __________isomers
Two
Five
Four
Three

Question 7 : A substance which ionises to produce hydroxide ions is called __________.
Base
Acid
Salt
None of the above

Question 16 : 2-methylpropane will have ________than butane.
lower melting point
lower saturation point
lower due point
lower boiling point

Question 17 : With respect to symmetry, trans isomer is _________ to cis isomer.
equal symmetry
Less symmetrical
more symmetrical
opposite symmetry
Question 1 : Increase in melting point as a result of increase in molecular weight is due to increase in ___________.
Hydrogen bonding
Dipole-dipole interactions
electrostatic forces
London forces

Question 2 : In ionic compounds, the positive and negative ions are held together by all these EXCEPT ________.
Hydrogen bonding
London forces
Dipole-dipole interactions
electrostatic forces

Question is to connect with richt answers. ( Number to aphabet)

1. Ethane-->1,2-dichloroethnane
2. 1,2 tetrabromoethane --> ethyne
3. Benzene--> Cyclohexane
4.Propan-2-ol-->Propanal
5. Acetonitrile--> Ethanoic acid

a.Zn/CH3OH
b. Na2Cr2O7/ H2SO4
c. H2O / H+, t°C
d. Cl2
e. H2/ Ni/ heating

Question 16 : A functional group that introduces polarity leads to __________ in the molecule.
increase saturation point
Permanent dipole moment
increase melting point
increase boiling point

Question 17 : Among isomeric molecules, the linear isomer is ________.
Polar isomer
non-polar isomer
Unbranched isomer
Branched isomer

Question 18 : Aryl halides may be forced to react with nucleophiles under drastic conditions such as
low temperature
mild temperature
High temperature
either low or high temperature

Question 19 : All these affect boiling points except __________.
Molecular structure
Shape of molecule
London forces
Polarity

Question 20 : All these are electron donating groups with respect to reactivity and orientation EXCEPT _______

−
N
H
C
O
R
−NHCOR


−
C
N
−CN


−
O
H
−OH


−
O
R
−OR

Question 6 : Alkyl, aryl, and alkenyl halides, when treated with metallic alloys form _______.
carbonyl compounds
carboxylic compounds
metallic compounds
organometallic compounds

Question 7 : All these qualifies a grignard reagent to be a highly reactive compound EXCEPT _________.
the carbon atom in it is strongly basic
the carbon atom in it is nucleophilic in nature
it follows SN_{2} pathway
Strongly polarized C-M bond

Question 8 : All these affect boiling points except __________.
Molecular structure
London forces
Shape of molecule
Polarity

Question 9 : Alkyl halides can be prepared from all these EXCEPT __________
Chloromethylation of benzene
Carboxylic acid
Aromatic Amines
grignard reagent

Question 10 : 2-methylpropane will have ________than butane.
lower saturation point
lower due point
lower melting point
lower boiling point

Question 1 : A benzene ring is a ________ system.
non conjugation
Hyperconjugation
Conjugation
None

Question 2 : A compound in which a halogen atom is attached to another carbon atom by a double bond is called -----.
Vinyl halide
Vicinal dihalides
Alkyl halide
Geminal dihalides

Question 3 : A benzenoid hydrocarbon in which two benzene rings are fused together at the ortho position is called ----------. <
Naphthalene
Anthracene
Biphenyl
Phenanthrene

Question 4 : _______is an example of Isolated Benzenoid Hydrocarbon.
Naphthalene
Phenanthrene
Biphenyl
Anthracene

Question 5 : Another name for methyl benzene is __________.
Toluene
Phenol
Naphthalene
Xylene