List of top Questions asked in KEAM

If Q1 and Q2 are respectively the heat supplied and expelled by a system at a constant temperature, then the work done by the system is
An astronaut experiences weightlessness in space satellite because

Benzene diazonium chloride on treatment with reagent 'X' gives iodobenzene. The reagent ‘X’ is

The number of moles of alkyl halides required to convert primary amine into quaternary ammonium salt is
The order of boiling point of the following amines is (i) Butan-1-amine
(ii) N-Ethylethanamine
(iii) N,N-Dimethylethanamine
An aromatic compound (X) of molecular formula, C7H7Cl, on ammonolysis gives Y (Molecular formula, C7H9N). The compound Y reacts with two moles of CH3Cl gives N, N-Dimethylphenylmethanamine. The compounds 'X' and 'Y' are
The eye defect astigmatism can be corrected by using a
In dielectrics, polarization is the dipole moment per unit
The force acting on the particle of 0.2 kg mass whose displacement is described by the equation \( x = 3t + 7t^2 \, \text{m} \)
The dimensions of \( \frac{B}{E} \) are (B: Magnetic induction, E: Electric field intensity)
A hockey player hits a ball with an impulse of 15 Ns. If time of hit is 0.2 s, the average force exerted by the player on the ball is
Which of the following compounds is used to cover the surface of a metallic object to prevent corrosion?
A carbon resistor has a tolerance of 20\%. As per the colour codes of resistors, the last band in that resistor is
When a current of 2 A flows through a wire for 2.5 s, the amount of heat liberated is 20 J. The resistance of the wire is
The intensity of a polarized light can be controlled by a second polarizer from
Which of the following gases has the lowest solubility in water at 298 K?
The first and second ionization enthalpies of lanthanoids are comparable with the element
Hardness of water is estimated by titration with
The temperature and pressure required for reforming benzene from n-hexane is
When C6H5CHO reacts with the mixture of HNO3 and H2SO4 at 273-283K, it gives
The correct order of ionization enthalpy is
The increasing order of atomic radii is
The work done to lift a 60 kg mass to a height of 5 m from the ground is (g = 10 m/s\(^2\))
Which of the following molecules has 3 bond pairs and 2 lone pairs of electrons?
A solution is prepared by adding 4 g of a substance to 46 g of ethanol. What is the mass percentage of the solute?