List of top Questions asked in JEE Main

A compound A on reaction with X and Y produces the same major product but different by product a and b Oxidation of a gives a substance produced by ants X and Y respectively are :

In the above conversion of compound $( X )$ to product $( Y )$, the sequence of reagents to be used will be:

Major product of the following reaction is

Match List I with List II.

List-I		List-II
A	Sulphate	I	Pesticide
B	Fluoride	II	Bending of bones
C	Nicotine	III	Laxative effect
D	Sodium arsinite	IV	Herbicide

Choose the correct answer from the options given below:

Which of the following has maximum number of l.p. at central atom?

The geometry around boron in the product 'B' formed from the following reaction is $ BF _3+ NaH \xrightarrow{450 K } A + NaF$ $ A + NMe _3 \rightarrow B$

Red ppt. by Benedict solution is?

What is the chemical formula of freon gas?

$20 \,mL$ of $01 \,M \,NH _4 OH$ is mixed with $40\, mL$ of $005\, M \,HCl$ The $pH$ of the mixture is nearest to: (Given: $K _{ b }\left( NH _4 OH \right)=1 \times 10^{-5}, \log 2=030$, $\log 3=048, \log 5=069, \log 7=084$, $\log 11=104$ )

The number of correct statement/s from the following is
A. Larger the activation energy, smaller is the value of the rate constant
B. The higher is the activation energy, higher is the value of the temperature coefficient
C. At lower temperatures, increase in temperature causes more change in the value of $k$ than at higher temperature
D. A plot of $\ln k$ vs $\frac{1}{T}$ is a straight line with slope equal to $-\frac{E_a}{R}$

R₁ = (15 ± 0.5) Ω
R₂ = (10 ± 0.5) Ω
Find % error in equivalent resistance if resistors R₁ and R₂ are connected in parallel ?

Density (p) of a body depends on the force applied (F), its speed (v) and time of motion (t) by the relation p = KF^av^bt^c , where K is a dimensionless constant. Then

A Particle is projected vertically upward reaches 136 m height. What will be the maximum range for the particle projected with same speed ?

A particle moves in a circular path with uniform speed v. When it turns by 90°, find ratio of $\frac{v}{<\overrightarrow{v}>}$?

If the position of a particle is changing with time as r=t²-2t (m). Find the velocity at t=2s.

Find the radius of the orbit corresponding to the 4th excited state in Li++. (a0 is the radius of first orbit in H-atom)

Let $\eta_1$ is the efficiency of an engine at $T _1=447^{\circ} C$ and $T _2=147^{\circ} C$ while $\eta_2$ is the efficiency at $T _1=947^{\circ} C$ and $T _2=47^{\circ} C$ The ratio $\frac{\eta_1}{\eta_2}$ will be :

Given below are two statements Statement I : Pig iron is obtained by heating cast iron with scrap iron Statement II : Pig iron has a relatively lower carbon content than that of cast iron In the light of the above statements, choose the correct answer from the options given below

In a thermodynamic process work done by gas is 1000 J & heat supplied is 200 J. Find change in internal energy of gas?

Pressure for polytropic process P varies with volume V as P=av-3, find out the bulk modulus.

Ratio between rms speed of Ar to the most probable speed of $O^2$ at $27\degree C$ is

For two different photosensitive materials having work function and 2 respectively, are illuminated with light of sufficient energy to emit electrons. If the graph of stopping potential versus frequency is drawn, for these two different photosensitive materials the ratio of slope of graph for these two materials is

Choose the correct options based on the column shown below.

1.	TV signal	(P)	12 GHz
2.	Satellite	(Q)	30 MHz
3.	AM	(R)	88 MHz
4.	FM	(S)	1 MHz

Light wave travelling in air along $x$-direction is given by $E_y=540 \sin \pi \times 10^4(x-c t) Vm ^{-1}$ Then, the peak value of magnetic field of wave will be (Given $c =3 \times 10^8 ms ^{-1}$ )

Force acting on a particle moving along the x - axis is given by F = (2 + 3x)i. The work done by this force from x = 0 to x = 4 m is