List of top Questions asked in NEET (UG)- 1991

A magnetic field of $2\times 10^{-2}$T acts at right angles to a coil of area 100 $cm^2$, with 50 turns. The average e.m.f. induced in the coil is 0.1 V, when it is removed from the field in t sec. The value of t is
Photosynthetic pigments found in the chloroplasts occur in
The maximum number of electrons, present in an orbit that is represented by azimuthal quantum number $(l)=3$, will be
Basicity of orthophosphoric acid is
$PCl_3$ reacts with water to form
Freshly released human egg has
In compound ' X - all the bond angles are exactly 109$^{\circ}$28', 'X - is
A 100 millihenry coil carries a current of 1 A. Energy stored in its magnetic field is
A uniform magnetic field acts right angles to the direction of motion of electrons. As a result, the electron moves in a circular path of radius 2 cm. If the speed of electrons is doubled, then the radius of the circular path will be
A deuteron of kinetic energy 50 keV is describing a circular orbit of radius 0.5 metre in a plane perpendicular to magnetic field B. The kinetic energy of the proton that describes a circular orbit of radius 0.5 metre in the same plane with the same B is
A particle of mass m = 5 is moving with a uniform speed v = 3$\sqrt 2$ in the XOY plane along the line Y = X + 4. The magnitude of the angular momentum of the particle about the origin is
At a particular locus, frequency of allele $A$ is $0.6$ and that of allele a is $0.4$. What would be the frequency of heterozygotes in a random mating population at equilibrium?
Hormone connected with cell division, is
ADH or vasopressin is
Aqueous solution of acetic acid contains
Bacteria lack alternation of generation because there is
Blood group AB has
Blue eye colour is recessive to brown eye colour. | A brown eyed man whose mother was blue eyed marries a blue-eyed women. The children will be
Bryophytes are amphibians because
Most accepted theory for ascent of sap is
Dark reactions of photosynthesis occur in
Deep black soil is productive due to high proportion of
During cleavage, what is true about cells?
Ferredoxin is a constituent of
Fertilizin is a chemical substance produced from