List of practice Questions

Which one of the following pair of elements has similar properties?
Which one proves transverse nature of waves?
What is the co-ordination number of sodium in $Na_2O$ ?
Water rises in a vertical capillary tube upto a length of $10 \,cm$. If the tube is inclined at $ 45{}^\circ $ , the length of water column risen in the tube will be
Viroids have
Universal recipient blood group is
Two identical photo cathodes receive light of frequencies $f_1$ and $f_2$. if the velocities of the photoelectrons (of mass m) coming out are respectively $v_1$ and $v_2$, then
Two coils are placed close to each other. The mutual inductance of the pair of coils depends upon
To demonstrate the phenomenon of interference we require two soruces which emit radiation of
Three charges $-q_1, +q_2$ and $-q_3$ are placed as shown in the figure. The x-component of the force on $-q_1$ is proportional to
The work done in placing a charge of $8 ??10^{-18}$ coulomb on a condenser of capacity 100 micro-farad is
The velocity with which a projectile must be fired so that it escapes earth's gravitation does not depend on
The term Meiosis was given by:
The source of somatostatin is same as that of
The reaction quotient $( Q )$ for the reaction: $N _{2}( g )+3 H _{2}( g ) \rightleftharpoons 2 NH _{3}( g )$ is given by $Q =\frac{\left[ NH _{3}\right]^{2}}{\left[ N _{2}\right]\left[ H _{2}\right]^{3}} .$ The reaction will proceed from right to left if :
The phase of menstrual cycle in humans that last for $7-8$ days, is
The physical quantities not having same dimensions are
The kinetic energy of an electron is $ 5\,\,eV $ . Calculate the de-Broglie wavelength associated with it ( $ h=6.6\times {{10}^{-34}}\,\,Js $ , $ {{m}_{e}}=9.1\times {{10}^{-31}}kg $ ):
The work done in pulling up a block of wood weighing $ 2\,\,kN $ for a length of $ 10\,\,m $ on a smooth plane inclined at an angle of $ {{15}^{o}} $ with the horizontal is:
A resonance air column of length $ 40\,\,cm $ resonates with a tuning fork of frequency $ 450\,\,Hz $ . Ignoring end correction, the velocity of sound in air will be:
A siren emitting sound of frequency 500 Hz is going away from a stationary listener with a speed of $ 50\,\,m/s $ , the frequency of sound to be heard directly from the siren is:
The peak value of alternating current is $ 5\sqrt{2} $ ampere. The mean square value of current will be:
In junction diode, the holes are because of:
The ortholpara directing group among the following is
The number of real solutions of the equation $x^2 - 3 |x| + 2 = 0$ is