The cumulated alkadiene is from Chemistry Hydrocarbons

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 Multiple Choice QuestionsMultiple Choice Questions

481.

In the following reaction, number of possible structure is

  • 1

  • 2

  • 5

  • 6


482.

In Zeigler Natta polymerisation of ethylene, the active species is

  • AlCl3

  • Et3Al

  • CH2CH2

  • Ti3+


483.

The number of possible alkynes with molecular formula C5H8 is

  • 1

  • 3

  • 5

  • 8


484.

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

  

  • 1

  • 2

  • 3

  • 6


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485.

Which of the following is an anti-knocking compound?

  • TEL

  • LTC

  • Freon

  • Gasoline


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486.

The cumulated alkadiene is


C.

(i) The alkadienes in which two double bonds are on adjacent carbon atoms are known as cumulated alkadienes.

(ii) The alkadienes, having alternate single and double bonds are known as conjugated dienes.

(iii) The alkadienes having two double bonds seperated by more than one single bond are known as isolated dienes.


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487.

The IUPAC name of 

   is

  • 4-bromo-2-chloro-5-iodo-1-fluorobenzene

  • 2-carbamoylhex-3-enal

  • 1-bromo-2-chloro-3-fluoro-6-iodobenzene

  • 2-bromo-1-chloro-5-fluoro-3-iodobenzene


488.

Compound  which of the following prefix?

  • trans

  • Anti

  • E

  • Z


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489.

Friedel-Crafts reaction is not related with

  • acylation

  • reduction

  • sulphonation

  • nitration


490.

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


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