List of top Questions asked in KEAM

In which of the following aqueous solutions of salt, is pH independent of the concentration of the salt?
Which of the following pairs of aquated first transition metal ions have the same color?
For the gas phase homogeneous equilibrium:

\[ 2X(g) \rightleftharpoons 2Y(g) + Z(g) \]

$K_C$ at 400K is $1 \times 10^{-3}$ mol L-1. What is the value of $K_P$ for the equilibrium at 400K?

\[ R = 0.082 \, \text{L atm K}^{-1} \, \text{mol}^{-1} \]

Which of the following changes alone would cause increase in the value of the equilibrium constant of the reaction? 
\(PCl_5(g) \rightarrow PCl_3(g) + Cl_2(g); \Delta H>0\)

Which of the following is an example of pseudo first order reaction?
Which of the following molecules has two sigma ($\sigma$) and two pi ($\pi$) bonds?
0.1 M HCl and 0.1 M H2SO4 each of volume 2 mL are mixed and the volume is made up to 6 mL by adding 2 mL of 0.01 N NaCl solution. The pH of the resulting mixture is
The molar enthalpy of vaporization of water at 1 bar and $100^\circ$C is 41 kJ mol$^{-1}$. What is the internal energy change when 1 mol of water is vaporized at 1 bar pressure and $100^\circ$C? Assume water vapor as a perfect gas. (R = 8.3 J K$^{-1}$ mol$^{-1}$)

A particular color of light has a wavelength of 663 nm. What is the energy possessed by the light? 
(Planck’s constant $h = 6.63 \times 10^{-34}$ J·s; Velocity of light $c = 3 \times 10^8$ m/s)

Octet rule is obeyed in
The element with atomic number 111 was first named as Unununnium. What is its IUPAC name?
Isobars are atoms with the same
The number of significant figures in 0.0500L is
Which one of the following is not a semiconductor?
In a p-n junction diode, reverse biasing
Half-life of radon is 3.5 days. The amount of radon left out of 12 mg mass undecayed after 35 days is nearly
If the nuclear radius of $^{125}_{52}\text{Te}$ is 6 fermi, then the nuclear radius of $^{27}_{13}\text{Al}$ in fermi is
In a nuclear decay, after the emission of one $\alpha$-particle and one $\beta$-particle
When the hydrogen atom is excited from the ground state,
The photoelectric work function for a photosensitive material is 5.2 eV. The energy of the incident radiation for which the stopping potential is 6 V is

If the speed of a moving particle is decreased by 1%, the de Broglie wavelength of the wave associated with it

In Young’s double slit experiment, to change the bandwidth from $\beta$ to $\frac{\beta}{4}$ without changing the experimental setup, the wavelength of light $\lambda$ used must be changed to

If the ratio of amplitudes of two light waves is 2 : 1, then the ratio between the intensities of the two waves is
The correct order of arrangement of electromagnetic waves according to their wavelengths is
The number of windings in the primary and secondary of a transformer are 100 and 2000 respectively. If 50 V a.c is applied to the primary, the potential difference across the secondary is