List of top Chemistry Questions

When phenol is treated with CHCl₃ and NaOH, the product formed is

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of

IUPAC name of (CH3)2CH-CH=CH-CH3 is,

Which mechanism involves heterolytic fission?

Soap suds is a:

Which is need for electroless plating?

Using Lewis concept, determine the decreasing order of basic strengths of\( ClO_{4 ^-} , ClO_{3^-} \,\,and \,\,ClO_{2 ^-}\)

Four species are listed below
I. HC\(O_3^ - \)
II. H ₃O⁺ 
III. HS\(O_4^ - \)
IV. HSO₃F 
Which one of the following is the correct sequence of the acid strength?

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 (M_m=18 gmol^-1), 120g acetic acid (M_m= 60 gmol^-1) and 115g ethanol (M_m= 46 gmol^-1).

The oxidation of sodium sulphite by air is retarded by

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

Spin magnetic moment of cobalt of the compound Hg[Co(SCN)₄] is ___ (Provided:Co²⁺)

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

The atomic radius is equal to

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.

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?

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