List of top Questions asked in JEE Advanced

An eye specialist prescribes spectacles having combination of convex lens of focal length 40 cm in contact with a concave lens of focal length 25 cm. The power of this lens combination in diopters is
Which of the following is an organometallic compound?
The parameter on which the value of the determinant $\Rightarrow \Delta=\begin{vmatrix}1& a & a^2\\ \cos(p-d)x& \cos\ px & \cos(p+d)x\\ \sin(p-d)x& \sin\ px& \sin(p+d)x\\ \end{vmatrix}$ does not depend upon, is
The number of moles of $KMnO_4$ that will be needed to react completely with one mole of ferrous oxalate in acidic medium is
The maximum kinetic energy of photoelectrons emitted from a surface when photons of energy 6 eV fall on it is 4 eV. The stopping potential in volt is
The critical temperature of water is higher than that of $O_2$ because the $H_2O$ molecule has
The compressibility factor of an ideal gas is
The average translational energy and the rms speed of molecules in a sample of oxygen gas at 300 K are $6.21 \times 10^{-21}$ J and 484 m/s respectively. The corresponding values at 600 K are nearly (assuming ideal gas behaviour)
During debromination of meso-2,3-dibromobutane, the major compound formed is
(CH$_3 )_3$CMgCl on treatment with D$_2O$ produces
Which one of the following species is not a pseudo halide?
In Cannizzaro's reaction, the intermediate which is the best hydride donor is
When cyclohexane is poured on water, it floats because
How many optically active stereoisomers are possible for butane-2, 3-diol ?
The standard reduction potentials of $Cu^{2+} / Cu $ and $Cu^{2+} / Cu^+$ are 0.337 V and 0.153 V respectively. The standard electrode potential of $Cu^+ /Cu$ half-cell is
Which of the following compounds is expected to be coloured?
Ammonium dichromate is used in some fireworks. The green coloured powder blown in the air is
A proton, a deuteron and alpha particle having the same kinetic energy are moving in circular trajectories in a constant magnetic field. $r_p, r_d $ and $r_{\alpha}$ denote respectively the radii of the trajectories of these particles, then
A mass m is moving with a constant velocity along a line parallel to the x-axis, away from the origin. Its angular momentum with respect to the origin
A whistle giving out 450 Hz approaches a stationary observer at a speed of 33 m/s. The frequency heard by the observer (in Hz) is (Speed of sound = 330 m/s) .
The cyanide ion $CN^-$ and $N_2$ are isoelectronic, but in contrast to $CN^-$ , $N_2$ is chemically inert because of
Among the following species, identify the isostructural pairs. $NF_3$, $NO_3^-$, $BF_3$, $H_3O^+$, $N_3H$
Arrange the following compounds in order of increasing dipole moment, toluene (I), m-dichlorobenzene (II), o-dichlorobenzene (III),p-dichlorobenzene (IV)
The ratio between the root mean square speed of $H_2$ at 50 K and that of $O_2$ at 800 K is
Which of the following has the maximum number of unpaired electrons ?