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

203.

In Zeigler Natta polymerisation of ethylene, the active species is

• AlCl₃

• Et₃Al

• CH₂CH₂

• Ti³⁺

The number of possible alkynes with molecular formula C₅H₈ is

• 1

• 3

• 5

• 8

How many delocalised π-electrons are there in the following compound?

• 1

• 2

• 3

• 6

Which of the following is an anti-knocking compound?

• TEL

• LTC

• Freon

• Gasoline

The cumulated alkadiene is

Compound  which of the following prefix?

• trans

• Anti

• E

• Z

Friedel-Crafts reaction is not related with

• acylation

• reduction

• sulphonation

• nitration

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