List of top Questions asked in JEE Advanced

A convex lens of focal length 40 cm is in contact with a concave lens of focal length 25 cm. The power of the combination is

The threshold wavelength for photoelectric emission from a material is $5200\mathring{A}$. Photoelectrons will be emitted when this material is illuminated with monochromatic radiation from a

A particle is moving eastwards with a velocity of $5\, m / s$. In $10\, s$ the velocity changes to $5\, m / s$ northwards. The average acceleration in this time is

In the arrangement shown in the figure, the ends P and Q of an unstretchable string move downwards with uniform speed U. Pulleys A and B are fixed. Mass M moves upwards with a speed

In the Young's double slit experiment, the interference pattern is found to have an intensity ratio between the bright and dark fringes as 9, This implies that

Helium atom is two times heavier than a hydrogen molecule. At $298\, K$ the average kinetic energy of a helium atom is

There exist a function f (x), satisfying $f (0) = 1, f'(0) = -1, f (x) > 0$ for all x, and

The area bounded by the curves y = f (x), the X-axis and the ordinates x = 1 and x = b is (b - 1 ) sin (3b + 4). Then, f (x) is equal to

If A and B are two independent events such that $P(A) > 0,$ and $P(B)\ne 1$, then $P(\overline{A}/ \overline{B})$ is equal to

The scalar $\overrightarrow{A}.[(\overrightarrow{B}+\overrightarrow{C})\times(\overrightarrow{A}+\overrightarrow{B}+\overrightarrow{C})]$ eqy=ual

Eight chairs are numbered 1 to 8. Two women and three men wish to occupy one chair each. First the women choose the chairs from amongst the chairs marked 1 to 4 and then the men select the chairs from amongst the remaining. The number of possible arrangements is

The compound with highest boiling point is

In the metallurgy of iron, limestone is added to the blast furnace. The calcium ions end up as

The ion that cannot be precipitated by both HCl and $H_2 S$ is

Iron is rendered passive by treatment with concentrated

Among the following, the linear molecule is

An alpha particle of energy $5 \,MeV$ is scattered through $180^\circ$ by a fixed uranium nucleus. The distance of closest approach is of the order of

The half-life of the radioactive radon is 3.8 days. The time, at the end of which 1/20th of the radon sample will remain undecayed, is (given $log_{10} e = 0.4343$)

If 0.5 mol of $BaCl_2$ is mixed with 0.2 mol of $Na_3PO_4$ the maximum number of moles of $Ba_3(PO_4 )_2$ that can be formed is

The temperature ar which a real gas obeys the ideal gas laws over a wide range of pressure is

In the circuit shown in figure the heat produced in the $5\Omega$ resistor due to the current flowing through it is 10 cal/s. The heat generated in the $4\Omega$ resistor is

An azeotropic solution of two liquids has boiling point lower than either of them when it

The rate constant of a reaction depends on

Pure ammonia is placed in a vessel at a temperature where its dissociation constant ($\alpha$ ) is appreciable. At equilibrium, $ N_2 + 3H_2 \rightleftharpoons 2NH_3$

The equilibrium $ SO_2CI_2 \, ( g) \rightleftharpoons SO_2 \, ( g) + CI_2 \, ( g) $ is attained at $ 25^\circ$C in a closed container and an inert gas, helium is introduced. Which of the following statements are correct ?