List of top Questions asked in JEE Main

For which of the following elements, only one oxidation state is possible?
If emf of hydrogen electrode at 25 ℃ is zero in pure water, then pressure of H2 in bar is?
Which of the following has a maximum dipole moment?
Which of the following is the correct structure of L- Glucose
The equation of stationary wave is given as \(y=2A\sin(\frac{2\pi}{\lambda}\cdot nt) \cos (\frac{2\pi}{\lambda}\cdot x)\), then which of the following is not correct.
Consider the network shown:

The equivalent resistance of the network is
An electron is projected along the axis of solenoid which carries constant current i, the trajectory of electron shall be
A wooden block is initially at rest on a smooth surface. Now a horizontal force is applied on the block which increases linearly with time. The acceleration- time (a - t) graph for the block would be
On a given rough incline plane, a solid sphere and a hollow cylinder having the same radius are rolled one by one, with the same speed. Ratio of heights attained by solid sphere and hollow cylinder is
Position of particle located on x-axis changes with time (t) as x = 2.5t2.
Speed of the particle at t = 5 seconds is equal to?
The atomic masses of He and Ne are 4 and 20 a.m.u., respectively. The value of the de-Broglie wavelength of He gas at −73∘C is "M" times that of the de-Broglie wavelength of Ne at 727∘C.M is
The conductivity of 0.02 N solution of a cell of KCl at 25∘C is 2.765×10−3S cm−1. If the resistance of a cell containing this solution is 4×103 ohm, what will be the cell constant?
Body accelerates from rest to 4 m/s, energy is E. If it accelerates from rest to 24, then energy is nE. Find n.
If the system of linear equations $ 8 x+y+4 z=-2 $, $ x+y+z=0 $, $ \lambda x-3 y=\mu$ has infinitely many solutions, then the distance of the point $\left(\lambda, \mu,-\frac{1}{2}\right)$ from the plane $8 x + y +4 z +2=0$ is :
Let \(C\) be the centre of the circle \(x^2+y^2-x+2 y=\frac{11}{4}\) and \(P\) be a point on the circle A line passes through the point \(C\), makes an angle of \(\frac{\pi}{4}\) with the line CP and intersects the circle at the points \(Q\) and \(R\) Then the area of the triangle \(PQR\) (in unit \({ }^2\)) is :
Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Experimental reaction of $CH _3 Cl$ with aniline and anhydrous $AlCl _3$ does not give $o$ and p-methylaniline.
Reason (R) : The $- NH _2$ group of aniline becomes deactivating because of salt formation with anhydrous $AlCl _3$ and hence yields $m$-methyl aniline as the product.
In the light of the above statements, choose the most appropriate answer from the options given below :
From the top of 30 m tower AB the angle of depression to another tower’s QP base and top is 60º and 30º respectively. Another point C lies on tower AB such that CQ is parallel to BP (where B and P are the base of towers). Then the area of BCQP is?
The radius of Na atom forming bcc lattice (in Å)?
Ba+2 cannot be precipitated as?
The correct increasing order of the magnitude of standard enthalpies of formation for group-1 halides is?
A naturally occurring amino acid that contains only one basic functional group.
The momentum of an electron revolving in \(n ^{\text {th }}\) orbit is given by : (Symbols have their usual meanings)
The ratio of the velocities of CH4 and O2 molecules, so that they are associated with de-Broglie waves of equal wavelength is:
A car is moving with a uniform speed of 72 km/h. After applying brakes it stops after traveling 100 m distance. If its mass along with the passengers is 1000 kg, then the value of force due to the application of brakes will be in newton:
The equation of motion of system is given by mx¨+cx˙+kx=0. The damped vibration, ωd can be written as: