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
D.
tautomerism
Urea shows tautomerism as-
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
Disymmetric object is one which is:
superimposable on its mirror image
non-superimposable on its mirror image
optically inactive
achiral