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
D.
brick red, crimson, apple green
The colours given by Calcium, Strontium and Barium in the flame test are brick red, crimson and apple green respectively.
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