| 1 |
The major reaction occurring in the engines of automobiles is
|
A. Oxidation
B. Reducing
C. Combustion
D. Decomposition
|
| 2 |
The carbon, carbon bond length in benzene is
|
A. 1.54A°
B. 1.34A°
C. 1.20A°
D. 1.39A°
|
| 3 |
Sulphuric acid generates nitronium ion by reacting with
|
A. Nitric acid
B. Nitrogen gas
C. Nitrous acid
D. Potassium nitrate
|
| 4 |
Aromatic hydrocarbons are the derivatives of
|
A. Normal series of paraffins
B. Alkene
C. Benzene
D. Cyclohexane
|
| 5 |
If we remove one hydrogen atom from an alkane we obtain a group called
|
A. Acetyle group
B. Formyle group
C. Alkyle group
D. Ketyle group
|
| 6 |
The simplest and the parent members of aromatic hydrocarbon is
|
A. Benzene
B. Toluene
C. Biphenyis
D. Naphthalene
|
| 7 |
Which of the following is not an electrophitic substitution reaction of benzene
|
A. Nitration
B. Sulphonation
C. Fridel-Craft alkylation
D. Free radical chlorination of benzene
|
| 8 |
Benzene is not prepared from
|
A. Acetylene
B. Phenol
C. Benzoic acid
D. Bromo benzene
|
| 9 |
The empirical formula of benzene is determined by
|
A. IR spectra
B. U.V
C. Elemental analysis
D. NMR spectra
|
| 10 |
Acetylene when treated with 10% H2SO4in the presence of HgSO4adds one molecule of water to form
|
A. Aldehydes
B. Esters
C. Alcohols
D. Acids
|
| 11 |
A fuel has the same knocking property as a mixture of 70 isooctane (2, 2, 4- trimethyl pentane) and 30% n-heptane by volume the octane number of the fuel is
|
A. 100
B. 70
C. 50
D. 40
|
| 12 |
Which one of following is not monocyclic aromatic hydrocarbon
|
A. Benzaldehyde
B. Benzoic acid
C. Benzene sulfonic acid
D. Biphenyl
|
| 13 |
Most common reactions of benzene and its derivatives are
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A. electrophilic addition reactions
B. electrophilic substitution reactions
C. Nucleophilic addition reactions
D. Nucleophilic subtitution reactions
|
| 14 |
Which of the following is not an ortho-para directing group
|
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| 15 |
Alkenes combine readily with electrophillic reagents such as halogens giving
|
A. Haloalkanes
B. Gem-dihalides
C. Vicinal dihalides
D. Vinyl halides
|
| 16 |
Benzene was discovered by Michael Faraday's in
|
A. 1824
B. 1825
C. 1826
D. 1827
|
| 17 |
Reaction of ethanes with KMnO4 gives:
|
A. Ozonide
B. Glyoxal
C. Glycol
D. Oxalic acid
|
| 18 |
Catalytic oxidation of alkanes is used for the preparation of
|
A. Adehydes
B. Ketones
C. Fatty acid
D. Carbonyylic acids
|
| 19 |
Which one gives acidic reactions?
|
A. CH3----C≡C-------CH3
B. CH3-----CH2-----HC=CH----CH2
C. CH3----CH=CH2
D. CH3-----C≡CH
|
| 20 |
How many isomeric disubtituted products are obtained by the introducing of second group in the ring
|
A. Two
B. Three
C. Four
D. None
|
| 21 |
The stability of acromatic compounds decreases with ------- in the no. of its resonance structure
|
A. Decrease
B. Increase
C. Remain constant
D. Partially decreases
|
| 22 |
Synthetic rubber is made by polymerization of
|
A. Chloroform
B. Acetylene
C. Divinlacetylene
D. Butene
|
| 23 |
Which of the following is not aromatic hydrogencarbon
|
A. Benzene
B. Naphthalene
C. Toluene
D. Cyclohexene
|
| 24 |
Substituted phenyl groups are called
|
A. acyl groups
B. phenyl groups
C. Aryl groups
D. Alkyle groups
|
| 25 |
Write the name of following compound
|
A. 5 - methyle - 2- hexene
B. 2 - methyle hexene
C. 4 - ethyle - 2 - methyle hexene
D. 3 - ethyle - 3 - methyl hexene
|
| 26 |
Which reaction sequence would be best to prepare 3-chloro-aniline from benzene?
|
A. Chlorination, nitration, reducing
B. Nitration, chlorination, reducition
C. Nitration, reduction,chlorination
D. Nitration, reduction, acylation, chlorination, hydrolysis
|
| 27 |
The presence of a double bond in a compound is the sign of
|
A. Saturation
B. Unsaturation
C. Substitution
D. None of above
|
| 28 |
Hydrocarbons contain :
|
A. Carbon only carbon
B. Hydrogen only
C. Carbon & hydrogen
D. Carbon , hydrogen & halogen
|
| 29 |
Physical properties of alkanes increase with increase of all physical constants except
|
A. Boiling points
B. Melting points
C. Density
D. Solubility
|
| 30 |
Which reaction is too vigorous to control
|
A. Chlorination
B. Bromination
C. Iodination
D. Fluorination
|