List of top Chemistry Questions

Sodium extract of an organic compound gives blood red colour with FeCl₃. It contains

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

Which mechanism involves heterolytic fission?

A mixture of camphor and benzoic acid can be separated by which of the following technique?

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

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

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⁺)

The correct order of increase in boiling points

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

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?

The atomic radius is equal to