| 1 |
Characterstics of aromaic are: |
how hydrogen carbon ratio than alkanes
characterstics oudour
a &B
Characterstics properties
|
| 2 |
Aroma meas: |
Fragrant
Invisible
latest affinityt
benzene
|
| 3 |
Which term was derived from "aroma": |
Atom
Hydrocarbons
aromatic
aliphatic
|
| 4 |
Benzene was discovered by first of all: |
Micheal Faraday
Hofmann
Ainderson
Sorenbon
|
| 5 |
The hybirdization in benzene is: |
sp<sup>3</sup>
sp<sup>2</sup>
sp<sup>2</sup>
dsp<sup>2</sup>
|
| 6 |
Which is the property of benzene: |
Decolourizes KMnO<sub>4</sub>
straight chain structure
only double bond is present
triple and double bond
|
| 7 |
empirical formula mass of benzene is time lesser than moleculer formula mass: |
four
five
six
seven
|
| 8 |
empirical formula mass of benzene is time lesser than moleculer formula mass: |
four
five
six
seven
|
| 9 |
Bond angle in benzene is : |
109..5<sup>o</sup>
180<sup>o</sup>
120<sup>o</sup>
107.2<sup>o</sup>
|
| 10 |
Benzene acid can be prepared from the oxidation of: |
benzene
ethyl benzene
benzonic acid
toluene
|
| 11 |
Ozonolysis of benzene gives: |
Nitration
sulphonation
ozonide
glyoxal
|
| 12 |
Monosubstituted benzene can have disubstitution at position: |
Ortho
meta
para
a, b, c
|
| 13 |
Benzene gives reactions generally: |
Electropholic subsitution
addition
synthesis
addition and electropholic subsitution
|
| 14 |
Benzene gives reactions generally: |
Electropholic subsitution
addition
synthesis
addition and electropholic subsitution
|
| 15 |
Resonance energy of benzene is (in KJ mol-1): |
120
150
170
180
|
| 16 |
Kekule structures contributed towards actual structure of benzene |
60%
70%
80%
90%
|
| 17 |
Ratio of carbon to hydrogen in aromatic compounds is: |
Low than alkanes
High than alkanes
Low than alkanes not high than alkanes
High than alkanes
|
| 18 |
Simple aromatic compound is: |
benzene
toluene
aniline
phenol
|
| 19 |
The conversion of n-hexane into benzene by heating in the presence of Cr2O3 is called: |
Isomerization
Aromatization
Dealkylation
Rearrangment
|
| 20 |
Aromatic compounds burn with sooty flame cause: |
They have high percentage of hydrogan
They have ring structure
They have high percentage of carbon
They resist reaction with air
|
| 21 |
The electrophile in aromatic sulphontion is: |
H<sub>2</sub>SO<sub>4</sub>
HSO<sub>4</sub>
SO<sub>3</sub>
SO<sub>3+</sub>
|
| 22 |
Among the following, poly cyclic compound is: |
styrene
cumene
napthalene
xylene
|
| 23 |
Which compound is the most reactvie one: |
benzene
ethene
ethane
ethyne
|
| 24 |
Which of the following is explosive: |
Trinitropheonal
Nitropheonal
Nitromethane
Nitrobenzene
|
| 25 |
Acylation of benzene to produce aliphatic aromatic ketones is known as: |
Friedel Craft's reaction
Benzene condensation
Hydroformylation
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|
| 26 |
During nitration of benzene, the active nitrating agent is: |
NO<sub>3</sub><sup>-1</sup>
NO<sub>2+</sub>
NO<sub>2</sub><sup>-1</sup>
HNO<sub>3</sub>
|
| 27 |
Amongst the following, the compound that can be most readily sulphonated is: |
Toluene
Benzene
nitrobenzene
chlorobenzene
|
| 28 |
Benzene cannot undergo: |
Substitutions reactions
Addition reactions
Oxidation reactions
Elimination reactions
|
| 29 |
Which of the following acid can be used as a catalyst in Friedel craft's reaction |
AlCl<sup>3</sup>
HNO<sub>3</sub>
BeCl<sub>2</sub>
NaCl
|
| 30 |
Aromatic hydrocarbons are the derivatives of: |
Normal series of parrafins
Alkene
Benzene
Cyclohexane
|
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