List of top Questions asked in JEE Main

Statement 1: Positive zero error is added in measured value.
Statement 2: Defect may occur during manufacturing of measuring instruments
For the block shown, \(F_1\) is the minimum force required to move block upward and \(F_2\) is the minimum force required to prevent it from slipping find \(| F_1 - F_2|\)
Two charges \(Q\) and \(3Q\) are kept in a line separated by a distance \(R\). Electric field is zero at a distance x from \(Q\). Find the value of \(x\).
In the meter bridge shown below, the null point is at 40 cm from A. If R is shunted by 22, find the distance of new balance point from A
In the meter bridge shown below, the null point is at 40 cm from A
If current in a conductor \(3t^2 + 4t^3\), charge = \(?\), flow \(t = 1\; to\; t = 2s\)
If \(f(x) = (x - 2)^2 (x - 3)^3\) and \(x ∈ [1, 4]\) and If \(M\) and \(m\) denotes maximum and minimum values respectively, then \(M - m\) is
Find equivalent resistance between A and B for a given circuit in ___ohms.
Find equivalent resistance between A and B for a given circuit
Determine Min. Energy released when an electron jumps to ground state in Balmer series from infinity.
Number of isomeric products formed by monochlorination Of \(2-methyl \) \(butane\) in presence of sunlight is
A compound \((x)\) with molar mass \(108\) \(g\) \(mol^{-1}\) undergoes acetylation to give product with molar mass \(192\) \(g\) \(mol^{-1}\)
Ethylene glycol of \(x\) \(kg\) is mixed with \(18.6\) \(kg\) of solvent, \(24 °C\) depression in freezing point takes place. Calculate value of \(x\). (Given: \(K_1\) = \(1.6 °C/molal\) M.W. of ethylene glycol = \(62\) \(g/mol\))
Statement-I : Aniline on reaction with concentrated \(H_2SO_4\) at 475 K gives p-amino benzene sulphonic acid. This gives blood red colour with Lassaigne’s test. 
Statement-II : Aniline forms a salt with anhydrus \(AlCl_3\) in Friedel Craft’s reaction.

A solid sphere of radius \(4a\) units is placed with its centre at origin. Two charges \(-2q\) at \((-5a, 0)\) and \(5q\) at \((3a, 0)\) is placed. If the flux through the sphere is \(\frac{xq}{\in_0}\) , find \(x\)
 

A liquid drop of radius R is divided into 27 identical drops. If the surface tension of the drops is T, then find work done in this process.
Find minimum deviation in a thin prism if refractive index \(μ = cot\bigg(\frac{A}{2}\bigg)\). Here \(A\) represents the angle of prism.
A = {1, 2, 3, 4} , R = {(1, 2), (2, 3), (2, 4)} R ⊆ S and S is an equivalence relation then the minimum number of elements to be added to R is n, then the value of n is?
Determine ratio of de broglie wavelength of \(α- particle\) and proton of same kinetic energy is
A uniform disk of mass \(50\) \(kg\) is rolling without slipping with a speed of \(0.4 \;m/s\). Find minimum energy required to bring the disk to rest (in \(J\)).
Architect of Sydney Opera House?
An equation of a plane parallel to the plane \(x-2y+2z-5=0\) and at a unit distance from the origin is?
Given data \(60, 60, 44, 58, 68, α, β, 56\) has mean \(58\), variance = \(66.2\), then find \(α^2 + β^2\).
Find out sum of the coefficients of all the species involved in the balanced equation: \(2MnO_4+I^-\xrightarrow[{Medium}]{Alkaline}\)

IUPAC name of \(K_2MnO_4\) is

Match the following : 
(a) \([Cr(H_2O)_6]^{+3}\)(i) \(t^2_{2g}eg^0\)
(b) \([Fe(H_2O)_6]^{+3}\)(ii) \(t^3_{2g}eg^0\)
\((c) [Ni(H_2O)_6]^{+2}\)(iii) \(t^3_{2g}eg^2\)
(d) \([V(H_2O)_6]^{+3}\)(iv) \(t^6_{2g}eg^2\)
Choose the correct answers. 
  1. \(Mn_2O_7 \) is a oil at room temperature. 
  2. \(V_2O_4\) react with acid to give \(VO^{2+}\).
  3. \(CrO\) is a basic oxide.
  4. \(V_2O_5\) does not react with acids.