The quality of diesel is expressed by
octane number
cetane number
antiknock compound
presence of additives
B.
cetane number
(a) Octane numberis used to express the quality of petrol and gasoline.
(b) Cetane numberis used to express the quality of diesel. It is defined as the percentage of cetane (by volume) in a mixture of cetane (n-hexadecane) and α-methylnaphthalene which has the same ignition properties as the fuel under consideration.
(c) Antiknock compounds such as TEL (tetraethyl lead) is used to improve the quality of gasoline.
(d) Additives are also used to improve the quality of gasoline.
When petroleum is heated gradually, the first batch of vapours evolved will be rich in
kerosene oil
diesel oil
lubricating oil
petroleum ether
An alkyl bromide is formed as the major product on reaction of 3-methyl-2-butene with hydrobromic acid under thermodynamic conditions. Which of the following is the correct IUPAC name of this product?
2-bromo-3-methylbutane
1-bromo-3-methylbutane
2-bromo-2-methylbutane
1-bromo-3-methyl-2-butene
Which one of the following represents the major product of the reaction of benzene with 2, 2-dimethylpropyl chloride in presence of anhydrous aluminium chloride?
2, 2-dimethylpropylbenzene
1, 1-dimethylpropylbenzene
1, 2-dimethylpropylbenzene
1, 2-dimethyl-1-propenylbenzene
Octane number of petrol can be improved by admixing it with which of the following chemicals?
Et4Pb
CH3OC(CH3)3
Both (a) and (b)
Pyrene
An alkene having molecular formula, C6H10 gives OHC(CH2)4CHO, on ozonolysis. The alkene is
hexene-1
hexene-2
cyclohexene
1-methylcyclohexene-1
The correct name for the following hydrocarbon is
tricycle [4.1.0] heptane
bicyclo [5.2.1] heptane
bicyclo [4.1.0] heptane
bicyclo [4.1.0] hexane
The petrol, octane number of which is 80, has
20% n-heptane + 80% iso-octane
20% n-heptane + 80% n-octane
80% n-heptane + 20% iso-octane
80% n-heptane+ 20% n-octane
