List of top Chemistry Questions

Distillation under reduced pressure is employed for
Electronegativity of carbon atoms depends upon their state of hybridisation. In which of the following compounds, the carbon marked with asterisk is most electronegative?
Electrophilic reagents are
Heterolysis of carbon-chlorine bond produces
Heterolytic fission of a covalent bond in organic molecules gives
Hyperconjugation effect is also called
In Carius method of estimation of halogen, $0.15\, g$ of an organic compound gave $0.12\, g$ of $AgBr$. What is the percentage of bromine in the compound?
In column chromatography the moving phase is constituted of
In Kjeldahl?? method of estimation of nitrogen, nitrogen is quantitatively converted to ammonium sulphate. It is then treated with standard solution of alkali. The nitrogen which is present is estimated as
In Lassaigne's test, the organic compound is fused with a piece of sodium metal in order to
In Pinacol-pinacolone rearrangement the reactive species undergoing rearrangement is
In the mechanism of Hoffmann, reaction which intermediate rearranges to alkyl isocyanate ?
IUPAC name of 3-isopropyl-o-xylene is
IUPAC name of $CH_2=CH-CN$ is
IUPAC name of the following compound is$(CH_2 = CH)_2CH-CH = CH_2$
IUPAC nomenclature of the given organic compound $(CH_3)_2C(CH_2CH_3)CH_2CH(Cl)CH_3$ will be
Kjeldahl's method cannot be used for the estimation of nitrogen in
Lassaigne?? test for the detection of nitrogen fails in
Naphthalene can be purified by
The order or abstraction of primary, secondary and tertiary hydrogen atoms in alkanes by a halogen atoms follows the sequence
The empirical formula of an organic compound containing carbon and hydrogen is $CH_2$. The mass of one litre of this organic gas is exactly equal to that of one litre of $N_2$. Therefore, the molecular formula of the organic gas is
The violet colour in the Lassaigne's test of sulphur is due to
Vinyl carbinol is
What are the hybridization and shapes of the following molecules? (i) $CH_{3} F$ (ii) $HC \equiv N$
When an organic compound conta ining phosphorus is fused with fusion mixture, it gives