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
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.
Assertion (A): Reaction of 1-butene with HBr gives 1-bromobutane as major product.
Reason (R): Addition of hydrogen halides to alkenes proceeds according to Markownikoffs rule.
The correct answer is
A and R are correct and R is the correct explanation of A
A and R are correct but R is not the correct explanation of A.
A is correct but R is not correct
A is not correct but R is correct