List of practice Questions

The correct order of increase in boiling points
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 least random state of H2O is
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
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:
By what factors does the average velocity of a gaseous molecules increase when the temperature(in kelvin)is doubled?
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
The speed of the electron in 3rd orbit is _____ if the speed of electron in Bohr first orbit of hydrogen atom be x.
Which of the following sets of ion represents a collection of isoelectronic species?
A feedback circuit usually employs ..... network
___ have a definite shape and a definite volume
In an amplifier with negative feedback, the bandwidth is
The maximum efficiency of a half wave rectifier is
The transition in He+ ion that will give rise to a spectral line having the same wavelength as that of some spectral line in hydrogen atom is______
What are the states of Matter?
Which of the following elementary particle is a lepton?
If an electron and a proton have the same de Broglie wavelength, then the kinetic energy of the electron is
In a Bainbridge mass spectrograph singly ionized atoms of a Neon-20 pass into the deflection chamber with the velocity of 105 m/sec. If they are deflected by a magnetic field of flux density 0.08 tesla, then the path radius of Neon-20 ion is ____
In the JJ Thomson method for the determination of e/m what is the angle between the magnetic & electric fields to which the electrons are subjected?
Rutherford's α-particles scattering experiment showed that
(i)electrons have negative charge 
(ii)the mass and positive charge of the atom is concentrated in the nucleus 
(iii)neutron exists in the nucleus 
(iv)most of the space in atom is empty which of the above statements are correct?
Sun gives light at the rate of 1400Wm-2 of the area perpendicular to the direction of the light.
Assume λ(sunlight)=6000 Å . Calculate the number of protons/sec arriving at 1m2 area at that part of the earth
The diagram shows the energy levels for an electron in a certain atom. Which transtition shown represents the emission of a photon with the most energy ?
the energy levels for an electron in a certain atom.
The frequency of the charged particle circular at right angles to a uniform magnetic field does not depend upon the