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
C.
Both (a) and (b)
Octane rating of petrol can be imported by adding small amounts of certain compounds known as anti-knock compounds, eg, tetraethyl lead (TEL). Such petrol is known as leaded petrol. Now a days methyl tert-butylether (MTBE) is also used to increase octane rating because its oxygen helps gasoline to burn more completely and optimises the oxidation during combustion.
An alkene having molecular formula, C6H10 gives OHC(CH2)4CHO, on ozonolysis. The alkene is
hexene-1
hexene-2
cyclohexene
1-methylcyclohexene-1
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
When petroleum is heated gradually, the first batch of vapours evolved will be rich in
kerosene oil
diesel oil
lubricating oil
petroleum ether
The quality of diesel is expressed by
octane number
cetane number
antiknock compound
presence of additives
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
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