List of top Questions asked in JEE Main, KCET

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
If the time period of a pendulum at height R (Where R is radius of earth) from surface of earth is $T_1$ and at height 2R it is $T_2$, then
Find dimension of \(\sqrt{G}\).𝞵, where G is universal gravitational constant and 𝞵 is energy gradient
A block of mass m = 50 kg is lifted from ground to a height of 20 m in two different ways as shown in the figure. Find the ratio of work done by gravity in both the cases.
ratio of work done by gravity in both the cases
Two concentric conducting rings of radius a and b are placed as shown in diagram (a < < b). Find coefficient of mutual inductance of rings
coefficient of mutual inductance of rings
The correct relation between kinetic energy (K.E) and total energy (T.E) of a satellite orbiting around the planet is
Find the numbers of distinct real roots $|x||x + 2| - 5|x + 1| - 1$ =0
Find the ratio of energy stored in the two given capacitor systems.
ratio of energy stored in the two given capacitor systems ratio of energy stored in the two given capacitor systems
$ \lim_{t \rightarrow x} \frac{t^2f(x) - x^2 f(t)}{t-x} = 1$, then 2f(2) + 3f(3) equals to:
In YDSE for wavelength $λ = 5000 A$ , slit distance $d = 3 mm$ and screen distance of $2 m$, the intensity at a point which is $3 cm$ away from central maxima (assume intensity of light for each source is $I_0$) is $xl_0$ then x is
Match the column. [Given: mass of sun = $M_s$ | mass of earth = $M_e$ | Radius of earth = R | Distance between the Sun and the Earth = a]
List-IList-II
(A)Kinetic energy of Earth(I)$-\frac{GM_sM_e}{a}$
(B)Potential energy of Earth and Sun(II)$\frac{GM_sM_e}{2a}$
(C)Total energy of Earth and Sun(III)$\frac{GM_e}{ R}$
(D)Escape energy from surface of Earth per unit mass(IV)$\frac{GM_sM_e}{2a}$
Choose the correct answer from the options given below:
What is the correct order of strength of following ligands according to the spectrochemical series?
Find out the work done in the following process.
work done in the following process.
Wolff–Kishner reduction\(\xrightarrow{NH_2-NH_2/KOH}\;\; Product\)
Which of the following cation will give green colour in Borax bead test