The number of isomers for the compound with the molecular formula C₂BrClFI is

• 3

• 4

• 5

• 6

122.

In Lassaigne's test, a blue colour is obtained if the organic compound contains nitrogen. The blue colour is due to

• K₄[Fe(CN)₆]

• Fe₄[Fe(CN)₆]₃

• Na₃[Fe(CN)₆]

• Cu₂[Fe(CN)₆]

A molecule of urea can show :

• chain isomerism

• position isomerism

• geometrical isomerism

• tautomerism

Which of the following compounds will exhibit cis-trans isomerism ?

• 2-butene

• 2-butyne

• 2-butanol

• Butanone

When 32.25 g of ethyl chloride is subjected to dehydrohalogenation reaction the yield of the alkene formed is 50%. The mass of the product formed is (atomic mass of chlorine is 35.5).

• 14 g

• 28 g

• 64.5 g

• 7 g

The characteristic colours given by calcium, strontium and barium in the flame test are respectively :

• brick red, apple green, crimson

• crimson, apple green, brick red

• crimson, brick red, apple green

• brick red, crimson, apple green

The pair of [Co(SO₄)(NH₃)₅]Cl and [CoCl(NH₃)₅] SO₄ constitutes :

• ionisation isomers

• optical isomers

• linkage isomers

• co-ordination isomers

Lassaigne's test is used to detect :

• nitrogen and halogens

• sodium and halogens

• halogens and sulphur

• nitrogen, sulphur and halogens

The number of possible structural isomers of butene are:

• 3

• 2

• 4

• 1

Disymmetric object is one which is:

• superimposable on its mirror image

• non-superimposable on its mirror image

• optically inactive

• achiral