List of top Questions asked in JEE Advanced

A solution when diluted with $H_2 0$ and boiled, it gives a white precipitate. On addition of excess $NH_4 CI / NH_4 0H$, the volume of precipitate decreases leaving behind a white gelatinous precipitate. Identify the precipitate which dissolves in $NH_4 OH / NH_4 CI.$
$CuSO_4$decolourises on addition of KCN, the product is
$MgSO_4$ on reaction with $NH_4 OH $ and $ Na_2 HPO_4$ forms a white crystalline precipitate. What is its formula?
$ MgSO_4 $ on reaction with $ NH_4OH $ and $ Na_2HPO_4 $ forms a white crystalline precipitate. What is its formula?
Which of the following statement is (are) correct in the given figure ?
A solid sphere of radius R has moment of inertia I about its geometrical axis. It is melted into a disc of radius r and thickness t. If it's moment of inertia about the tangential axis (which is perpendicular to plane of the disc), is also equal to I, then the value of r is equal to
A solid sphere is in pure rolling motion on an inclined surface having inclination $?$
A double star system consists of two stars A and B which have time periods $T_ A $ and $T_B $ . Radius $ R_A $ and $ R_B $ and mass $ M_A $ and $M_B $ . Choose the correct option
If $e_1$ is the eccentricity of the ellipse $\frac {x^2}{16}+\frac{y^2}{25}=1$ and $e_2$ is the eccentricity of the hyperbola passing through the foci of the ellipse and $e_1e_2=1$ then equation of the hyperbola is
The graph between object distance u and image distance v for a lens is given below. The focal length of the lens is
If $2A+3B =\begin{bmatrix} {2}&{-1} &{4}\\ {3}&{2}& {5} \\ \end{bmatrix} $ and $A+2B \begin{bmatrix} {5}&{0} &{3}\\ {1}&{6}& {2} \\ \end{bmatrix} $then $B =$
Which of the following rays can be polarised?
A rigid container with thermally insulated walls contains a coil of resistance 100 $\Omega$, carrying current 1 A. Change in internal energy after 5 min will be

A photon collides with a stationary hydrogen atom in the ground state inelastically. The energy of the colliding photon is 10.2 eV. After a time interval of the order of microseconds, another photon collides with the same hydrogen atom inelastically with an energy of 15 eV. What will be observed by the detector?

Which of the following pair is expected to exhibit same colour in solution?
Name the structure of silicates in which three oxygen atoms of $[SiO_4]^{4-}$ are shared is
Two forms of D-glucopyranose, are called
If $x dy = y(dx+y dy),y(1)=1$ and $y(x) > 0$. Then, $y(-3)$ is equal to
Find out the value of current through $2\Omega$ resistance for the given circuit.
A moving coil galvanometer of resistance $100 \Omega$ is used as an ammeter using a resistance $0.1 \Omega$. The maximum deflection current in the galvanometer is $100 \mu A$. Find the current in the circuit, so that the ammeter shows maximum deflection.
A simple pendulum has time period $T_1$. The point of suspension is now moved upward according to the relation $y = kt^2, (k = 1ms^{-2})$ where y is the vertical displacement. The time period now becomes $T_2$. The ratio of $\frac{T^2_1}{T^2_2}$ is $(Take\,g = 10ms^{-2})$
Which one of the following statements) is incorrect about order of reaction?
Water of volume 2 L in a container is heated with a coil of 1 kW at 27$^{\circ}$C. The lid of the container is open and energy dissipates at rate of 160 J/s. In how much time temperature will rise from 27$^{\circ}$C to 77$^{\circ}$C? [Specific heat of water is 4.2 kJ/kg]
A convex lens is in contact with concave lens. The magnitude of the ratio of their focal length is of the ratio of their focal length is $\frac{3}{2}$ Their equivalent focal length is 30 cm. What are their individual focal lengths ?
One mole of monoatomic ideal gas expands adiabatieally at initial temperature T against a constant external pressure of I atm from 1 L to 2 L. Find out the final temperature $(R = 0.0821\: atm \: K^{-1}m oI^{-1})$