List of top Questions asked in KEAM- 2026

Which of the following reaction has the positive value of standard enthalpy of reaction?

Which of the following statement is incorrect about the periodic trend?

The transition energy of the electron from higher to lower level is $3.0\times10^{-19},J$. The wavelength of the emitted light is about ($h=6.625\times10^{-34},Js,\ c=3\times10^8,ms^{-1}$)

In a diode rectifier, the capacitors with large values of $C$ are used in filter circuits in order to

Which of the following represents the correct increasing order of first ionization enthalpy for Ca, Ba, S, Se and Ar?

If $5,mA$ current is drawn from the voltage source in the circuit connected with two resistors each of $2.4,k\Omega$ and four ideal diodes, then the source voltage is

The quantum number symbols are given in List-I and the informations about them are given in List-II. The correct match is}

$3.0,g$ of a salt of molecular weight $30$ is dissolved in $250,mL$ of water. The molarity of the solution is

If a radioactive substance is reduced to $6.25%$ of its initial amount in $256$ days then its half-life period is

If two waves of same wavelength with their intensities in the ratio $25:9$ produce interference, then the ratio of the maximum to minimum intensity is

If $r$ and $v$ represent, respectively, the orbital radius and orbital velocity of the electron in the Bohr's theory of hydrogen atom, then they are proportional to the orbit number as

If the energy of the incident radiation on a metal is increased by $10%$, the kinetic energy of the emitted photoelectrons increases from $0.5,eV$ to $0.75,eV$, then the work function of the metal is

If the de Broglie wavelengths of deuteron, positron and electron are in the ratio $1:2:3$, then the ratio of their respective momenta is

In a plane electromagnetic wave if the amplitude of oscillating electric field is $45,Vm^{-1}$ then the amplitude of the oscillating magnetic field is

For a given ac supply voltage $60\sin\omega t$, the reactances offered by $L$ and $C$ are found to be $20,\Omega$ each. If the resistance of the resistor is also $20,\Omega$, then the current in the circuit is

If the current in a coil of inductance $10,mH$ is increased from $1,A$ to $5,A$ in $0.2,s$, then the emf produced in it is

If an object is placed at a distance of $12,cm$ from a thin lens of power $5D$, then the distance of the image from the lens with proper sign convention is

If a coin at the bottom of a lake appears to be at a depth of $6,m$, then the gauge pressure on the coin in pascal is ($\mu$ of water = $\frac{4}{3}$)

The shunt resistance to be connected across a galvanometer of resistance $50,\Omega$ to send $\dfrac{1}{1000}^{\text{th}}$ of the main circuit current through the galvanometer is nearly

If three cells each of emf $2,V$ and internal resistance $1,\Omega$ are connected to a resistor of $4.5,\Omega$ as shown, then the current through the resistor is

With increase in temperature, the resistivity of

Regarding the magnetic property, the TRUE statement is

When a bar magnet of dipole moment $m$ is suspended in a uniform magnetic field $B$, then

Two long straight conductors carrying equal current kept parallel at a separation of $d$ metre experience a force per unit length. If the distance of separation is made $2d$, then to maintain the same force per unit length on each conductor, the current in each conductor should be increased to

If the resistance of a uniform wire of length $1,m$ of cross-sectional area $0.1,m^2$ is $12,\Omega$, then the resistance of wire of length $2,m$ of the same material with area of cross section $0.2,m^2$ is