List of top Questions asked in AIIMS

Cultivation of Bt cotton has been much in the news. The prefix Bt means:

The plant part which consists of two generations one within the other, is

An insect bite may result in inflammation of that spot. This is triggered by the alarm chemicals such as

$0.01 M$ solution of $KCl$ and $BaCl _{2}$ are prepared in water. The freezing points of $KCl$ is found to be $-2{ }^{\circ} C$. What is the freezing point of $BaCl _{2}$ to be completely ionised?

Non-oxide ceramics can be

A unit cell of sodium chloride has four formula units. The edge length of the unit cell is $0.0564\, nm$. What is the density of sodium chloride?

The chemical formula of 'tear gas" is

Non-oxide ceramics can be

A particle of mass $m$ moves with constant speed along a circular path of radius $r$ under the action of force $F .$ Its speed is

A converging lens forms a real image $I$ of an object on its principal axis. A rectangular slab of refractive index $\mu$ and thickness $x$ is introduced between $I$ and the lens, $I$ will move

A coin is placed on a horizontal platform which undergoes vertical simple harmonic motion of angular frequency $ \omega $ . The amplitude of oscillation is gradually increased. The coin will leave contact with the platform for the first time

A car, starting from rest, accelerates at the rate $f$ through a distance $S$, then continues at constant speed for time $t$ and then decelerates as the rate $f / 2$ to come to rest. If the total distance travelled is $15 S$, then

A parachutist after bailing out falls $50\, m$ without friction. When parachute opens, it decelearates at $ 2\,m/s^{2} $ . He reaches the ground with a speed of $3 \,m/s$. At what height, did he bail out?

A particle of mass $10\, g$ is kept on the surface of a uniform sphere of mass $100\, kg$ and radius $10 \,cm$. Find the work to be done against the gravitational force between them, to take the particle far away from the sphere (you may take $G=6.67 \times 10^{-11} Nm ^{2} / kg ^{2}$ )

A smooth block is released at rest on a $45^{\circ}$ incline and then slides a distance $d$. The time taken to slide is $n$ times as much to slide on rough incline than on a smooth incline. The coefficient of friction is

A hollow cylinder has a charge $q\,\, C$ within it. If $ \Phi $ is the electric flux in unit of voltmeter associated with the curved surface $B$, the flux linked with the plane surface $A$ in unit of voltmeter will be

For the given uniform square lamina $ABCD$, whose centre is $O$

If in a p-n junction diode, a square input signal of $10 \,V$ is applied as shown

Then the output signal across $ R_L$ will De

A wheel has angular acceleration of $ 3.0\,rad/s^{2} $ and an initial angular speed of $2.00 \,rad/s$. In a time of $2 \,s$ it has rotated through an angle (in radian) of

A bullet is fired from a rifle and the rifle recoils. Kinetic energy of rifle is

The half-life for the reaction $N _{2} O _{5} \longrightarrow 2 NO _{2}+\frac{1}{2} O _{2}$ is $2.4\, h$ at STP. Starting with $10.8\, g$ of $N _{2} O _{5}$ how much oxygen will be obtained after a period of $9.6\, h$ ?

The solubility product of $As _{2} O _{3}$ is $10.8 \times 10^{-9}$. It is $50 \%$ dissociated in saturated solution. The solubility of salt is

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 phase difference between the instantaneous velocity and acceleration of a particle executing simple harmonic motion is