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
How many delocalised π-electrons are there in the following compound?
1
2
3
6
D.
6
In the given compound, 4 π-electrons of double bond and 1 lone pair on N-atom leads to delocalisation of 6 π-electrons.
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