List of top Chemistry Questions asked in KEAM

The dipole-dipole interaction energy between rotation polar molecules is proportional to___, where 'r' is the distance between polar molecules.
Which one of the following reactions involves change from sp2 to sp3 hybridisation of the central atom?
A fast moving particle of mass 6.63×10-28g can be located with an accuracy of 1A. The uncertainty in its velocity (in ms-1) is about (h=6.63×10-34 Js)
From the following, choose the correct structures of chloroxylenol and terpineol, which are the constituents of "Dettol"
choose the correct structures of chloroxylenol and terpineol, which are the constituents of "Dettol"
A particle of mass 6.6×10-31kg is moving with a velocity of 1×107ms-1. The de Broglie wavelength (in A) associated with the particle, is (h=6.6×10-34 Js)
A di-negative ion of the element X consists of 10 electrons and 8 neutrons. A dipositive ion of the element Y consists of 12 protons. The number of neutrons in Y is 1.5 times the number of electrons in atom X. Then the mass numbers of X and Y would be in the ratio
Among the following pairs of compounds, the one that does not illustrate the law of multiple proportions, is
Which one of the following contains the highest number of oxygen atoms?
Which of the following aryl chlorides on warming with water forms the corresponding phenol?
Calculate the number of o and a bonds in 2-n-propylpent-1-ene.
The primary precursor of photochemical smog that can be metabolised by plants such as Juniparus and Pyrus, is
Which of the following is added to commercial salt to control hypothyroidism?
Which one of the following is a polysaccharide?
Which one of the following is a non-narcotic analgesics?
Conveyor belt is manufactured from
The product formed, when benzene diazonium fluoroborate is heated with aqueous sodium nitrite solution in the presence of copper is
Toluene on treatment with chromic oxide in acetic anhydride at 273K to 283K gives
Which one of the following molecules gives four isomeric monochlorides on photochemical chlorination?
'
Which one of the following represents valeraldehyde?
Resorcinol is
Among methanamine, ethanamine. benzenamine, N-methylaniline and N, N-dimethylaniline, the weakest and the strongest base in aqueous phase, respectively are
Choose the correct order of acidity of the following phenols:
(I) m-nitrophenol (II) p-cresol (III) p-nitrophenol (IV) phenol
Which one of the following molecules contains only primary and tertiary carbon atoms?
Match the following:

a)Alkane(i)Phenol
b)Alicyclic compound(ii)Tropolone
c)Benzenoid aromatic compound(iii)Isobutane
d)Non-benzenoid aromatic compound(iv)Furan
e)Heterocyclic compound(v)Cyclohexene


Choose the correct option:
The overall complex dissociation equilibrium constant for [Cr(H2O)6]3- ion is 5×10-12. The overall stability constant of the complex is