List of top Chemistry Questions

Which is need for electroless plating?
The oxidation of sodium sulphite by air is retarded by
The binary mixture in which partial miscibility increases on increasing temperature is
Calculate the mole fraction of water in a mixture containing 9.0 g water (Mm=18 gmol-1), 120g acetic acid (Mm= 60 gmol-1) and 115g ethanol (Mm= 46 gmol-1).
Using Lewis concept, determine the decreasing order of basic strengths of\( ClO_{4 ^-} , ClO_{3^-} \,\,and \,\,ClO_{2 ^-}\)
Spin magnetic moment of cobalt of the compound Hg[Co(SCN)4] is ___ (Provided:Co2+)
Arrange below molecules according to their increasing order of dipole moments
The outer orbitals of C in C2H4 molecule can be considered to be hybridized to give 3 equivalent sp2 orbitals. The total number of σ and π bonds in C2H4 molecule is
The least random state of H2O is
During the melting of a slab of ice at 273K at atmospheric pressure:
The enthalpy of hydrogenation of cyclohexene is - 119.5 kJ mol-1 . If resonance energy of benzene is -150.4 kJ mol-1 , its enthalpy of hydrogenation would be
The correct order of increase in boiling points
By what factors does the average velocity of a gaseous molecules increase when the temperature(in kelvin)is doubled?
Which of the following sets of ion represents a collection of isoelectronic species?
Among the following elements (whose electronic configurations are given below) the one having highest ionization energy is
Among the following series of transition metal ions, the one where all metal ions have same 3d electronic configuration is:
The speed of the electron in 3rd orbit is _____ if the speed of electron in Bohr first orbit of hydrogen atom be x.
Dalton's atomic theory successfully explained by _____?
(i) Law of conservation of mass 
(ii) Law of constant composition 
(iii) Law of radioactivity 
(iv) Law of multiple proportion
The atomic radius is equal to
___ have a definite shape and a definite volume
What are the states of Matter?
The predominant form of histamine present in human blood is $(pK_a$ Histidine $= 6.0)$
The major product obtained in the following reaction isThe major product obtained in the following reaction is
 
Phenol reacts with methyl chloroformate in the presence of $NaOH$ to form product $A, A$ reacts with $Br_2$ to form product $B. A$ and $B$ are respectively :
The correct order of spin-only magnetic moments among the following is : (Atomic number : Mn=25, Co=27, Ni=28, Zn=30)