List of top Questions asked in JEE Main

Two points (5, 2) and (2, a). Line passes through these points makes an angle of π/4 at origin. The product of all values of a is equal to

,Then the sum of elements of 10th row.

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?

The total number of compounds having Bond order 2 among the following are: F₂, N₂, Ne₂, O₂, Li₂, Be₂, C₂

Consider the following 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

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

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.

An object is projected such that its horizontal range and maximum height are same, then angle of projection is

An electron and a proton has same de Broglie wavelength. If K_e and K_p 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 \(\frac{q_1}{q_2}\)

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:

Let f(x) = cosx - x + 1, x ∈ [0,π], then

Find out the magnitude of work done on the gas when 1 mole of an ideal gas undergoes compression from 9 liter to 1 liter through a reversible isothermal process. (in Joule) (Nearest integer)