List of top Questions asked in JEE Main

How many carbon atoms are there in a molecule of tyrosine?
In the test for phosphorus using ammonium molybdate, yellow precipitate of compound (X) is obtained. What is the oxidation state of molybdenum in (X)?
S-I: Blood is a buffer solution, whose pH is maintained at 7.4 by an acidic buffer. 
S-II: pH is maintained by HCO3-  and   H2CO3
Assertion: Kjeldahl method is not used for pyridine.
Reason: Nitrogen of pyridine does not change to ammonium sulphate under these conditions.
Which of the following is correct?
Which of the following are aromatic compounds?
aromatic compounds
The total number of compounds having Bond order 2 among the following are: F2, N2, Ne2, O2, Li2, Be2, C2
Consider the following compound:
IUPAC nomenclature of the compound
What is the IUPAC nomenclature of the compound?
Select the correct options:
Statement 1: Benzene sulphonyl chloride reacts with 1°, 2° and 3° amines.
Statement 2: All products of the reaction above are soluble in NaOH.
If de- Broglie wavelength of electron is equal to de- Broglie wavelength of proton, then what is the relation between their kinetic energy
Consider the given reaction:
Cr2O72- ⥨ CrO42-
Above reaction shifts in forward direction in
A screw gauge with a pitch of 1 mm and a circular scale with 100 divisions is used to measure the thickness of the aluminium sheet. Negative zero error of 0.05 mm is there. What is the thickness of the sheet when main scale reading is 4 mm and 60th division coincides with the main scale line
A vernier caliper having least count \(\frac{1}{20N}\)cm and one main scale division is 1 mm, then value of one vernier scale division is
A wave is given by the equation y= Asin{ π(330t-x) },then frequency of the wave is
In a YDSE shown a monochromatic light of wavelength 500 nm is incident. At point P, 10th maxima is formed. Now the two slits are replaced with a single slit of width w placed at the centre. If first diffraction minima is observed at P, find w.
YDSE shown a monochromatic light
An object is projected such that its horizontal range and maximum height are same, then angle of projection is
Find ratio of magnetic field at point P to that at point Q. Point P is inside the solid cylinder and Q is outside the cylinder. Current is uniform through the crosssection of cylinder.
ratio of magnetic field at point P to that at point Q
An electron and a proton has same de Broglie wavelength. If Ke and Kp are their respective kinetic energies, then
A physical quantity P depends on electric field (E) and permittivity of free space ( ε0 ) as  P ∝ E ε02, Find dimension of P
A disk of mass M, radius R is rotating about an axis passing through its centre and perpendicular to its plane with angular speed ω. If another disk of mass \(\frac{M}{2}\) and radius R is gently placed over it what will be their common angular velocity after some time?
Figure shows two charges q1 and –q2 placed on the x-axis as shown. If electric field at p is along x-direction, find \(\frac{q_1}{q_2}\)
two charges q1 and –q2 placed on the x-axis
3 blue balls and 4 yellow balls are in a box. 3 balls are drawn at random. Let variance and mean be X & Y respectively then value of 3X + 4Y is:
The area bounded by y = min{sin x, cos x} and x-axis in -π ≤ x ≤ π interval is equal to (in sq. units):
if \(y=\int\frac{e^{\tan x}dx}{\cos^2x(1+e^{2\tan x})}\) and y(0)=6 then y\(\frac{\pi}{4}\) is equal to
If C1: (x-α)2 +(y-β)2 =r12, c2: (x-6)2+ (y - 15/2)2 = r22 touches each other at (6, 6). If line joining centres of c1 & C2 is divided by (6, 6) in 2: 1 internally, then (α + β) + 4(r12 +r22) is equal to: