List of practice Questions

Calculate the highest frequency of the emitted photon in the Paschen series of spectral lines of the hydrogen atom

Calculate the neutron separation energy from the following data: $ m (^{40}_{20} Ca) = 39.962591\,u $ , $ m (^{41}_{20} Ca) = 40.962278\,u $ , $ m_n = 1.00865, \,1u = 931.5\,Me V/c^2 $

Bohr model of hydrogen atom was unable to explain

An isolated population of humans with approximately equal numbers of blue-eyed and brown-eyed individuals was decimated by an earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called a

Biogenetic law as given by Haeckel states that

Banana is vegetatively propagated by

The problem of electrical discontinuity caused by connective tissue separating the atria from ventricles is solved by

Argentaffin cells in human beings are found in

Lichen is obligate association of

Obliquely placed ovary and swollen placentae occur in

The portion of enlarged axis above cotyledons is

Areolar tissue connects

Anti-Markownikoff addition of $HBr$ is not observed in

An object is placed at a distance of $10\, cm$ from co-axial combination of two lenses $A$ and $B$ contact. The combination forms a real image three times the size of the object. If lens $B$ concave with a focal length of $30\,cm$. The nature and focal length of lens $A$ is

An infinitely long hollow conducting cylinder with inner radius $R/2$ and outer radius $R$ carries a uniform current density along its length. The magnitude of the magnetic field, as a function of the radial distance $r$ from the axis is best represented by

Amplification of gene of interest by using DNA polymerase may go upto

Among the following, which is the least stable conformation of cyclohexane?

Argentaffin cells occur in

Alpha particles of kinetic energy $ 7.7 \,MeV $ are being scattered by the nucleus of gold which has $ 79 $ electrons. The distance of closest approach of the alpha particles is (Take $ \frac{1}{4\,\pi\, \varepsilon_{0} = 9 \times 10^{9} \, MKS} )$

Father of Indian Ecology is

In domestic sewage, suspended solids, colloidal and dissolved materials constitute

Xenograft is a graft

If haemoglobins (Hbs) of a normal and a sickle cell patient are subjected to electrophoresis, they will show

Mammal like reptiles evolved during

Basic principle for developing transgenic plants and animals is to introduce the gene of interest into nucleus of