List of top Questions asked in JEE Main

A parabola $y^2 = 12x$ has a chord PQ with mid-point (4, 1) then equation of PQ passes through
The value of $\frac{1\times 2^2+2\times3^2+...+100\times (101)^2}{1^2 \times 2\times2^2 \times3+...+100^2 \times 101}$
if  $∫_{-1}^1 \frac{cos \, \alpha x}{1+3^x} dx = \frac2{\pi} $ then $\alpha$ is

Major product A is

Hydrocarbons

IUPAC name of Catechol is-
Which of the following statement is INCORRECT
Find out number of unpaired electrons in d-subshell for $[Co(H_2O)_6]^{ 3+}. $
The correct order of ionisation enthalpy for Li, Na, Cl, F is:
Consider the following statements:
Statement I: The number of emitted photoelectrons Increases with increase in frequency of incident light.
Statement II: Kinetic energy of emitted photoelectrons increases with increase in frequency of incident light
If a, b, c are in increasing A.P. and a + 1, b, c + 3 are in G.P. If A.M. of a, b, c is 8. Find cube of G.M. of a, b, c.
Which of the following is used as adsorbent in adsorption chromatography?
Two point mass m and 2m are on straight line. If mass m moves toward centre of mass by distance 2 cm, then the distance must mass 2m should move so that centre of mass does not change ______ cm.
A body of mass 4 kg is at a height of R (radius of earth) from surface of earth. The weight of the body is ______ N.
Which one of the following has the most negative (highest –ve) electron gain enthalpy?
A bar magnet of magnetic moment M = 0.5A m2 is under the influence of a magnetic field 8 T. Find the work done (J) to move the magnet from stable to unstable equilibrium position.
For methane, translation degrees of freedom is $f_1$ while rotational degrees of freedom is $f_2$ . Find $f_1$ + $f_2$ .
What is the sum of number of ɑ and π bonds present in 2-oxo-hex-4-yne-oic acid ?
Arrange the following anions in the decreasing order of their stability.
Arrange the following anions in the decreasing order of their stability.
What is the maximum amount of acetanilide formed when acetic anhydride in excess is treated with 18 gm of aniline. (nearest integer)
Maximum number of orbitals possible when n = 4 and m = 0?
An element of d-block (Z) of 4th period has spin only magnetic moment of its $Z^{3+}$ form is 3.9 BM, then find minimum atomic number of element (Z).
Because of force (separately) of 3 N & 2 N, elongation in spring are found to be 'a' and 'b' unit respectively then (2a -3b) is.
The total number of chain isomers possible for a compound with molecular formula $C_7H_{16}$ are:
How many of the given statements are true for fuel cell? 
A. It is a type of Galvanic cell 
B. It is used for providing electrical power in space programmes. 
c. Hydrogen and oxygen are bubbled through porous carbon electrodes into concentrated NaOH solution 
D. It produces electricity with an efficiency of 40% 
E. It is pollution free cell
The ratio of radius of gyration of uniform hollow sphere and uniform solid sphere about its diameter is _______ (both have the same radius)