List of top Questions asked in KEAM- 2025

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
Which of the following molecules has 3 bond pairs and 2 lone pairs of electrons?
The product obtained on ozonolysis of 3-Ethylpent-2-ene are
Which of the following compounds is used to cover the surface of a metallic object to prevent corrosion?
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
Which of the following molecules has the highest standard enthalpy change of fusion (\( \Delta_{fus}H^\circ \)) (in kJ mol\(^{-1}\))?
The increasing order of atomic radii is
Which of the following transition metal oxide is used in dry battery cells?
A solution is prepared by adding 4 g of a substance to 46 g of ethanol. What is the mass percentage of the solute?
An ideal Carnot engine has an efficiency of 40 %. The ratio of the temperature of the sink to that of the source is
The order of energy of orbitals in the same subshell is
Angular momentum of a particle will not be zero, if the

The order of acidity of the following compounds is:
 (i) o-Nitrophenol 
(ii) Phenol 
(iii) o-Cresol 
(iv) Ethanol

A bullet of 10 g mass is fired at a speed of 50 m/s by a gun of 2 kg mass. The recoil speed of the gun (in m/s) is
Which one of the following principles helps to explain the flow of blood in an artery?
Energy equivalent of mass 0.5 kg is
In the nuclear process, 1122Na → 1022Ne + e+ + νe, then X is
The magnetic moment of an electron revolving in an orbit of 0.5 m radius with a velocity of \( 8 \times 10^7 \, \text{m/s} \) is (in \( \text{Am}^2 \))
If an electron moves with a velocity \( v \) in a magnetic field \( B \), the magnetic force on the electron is maximum when the angle between \( v \) and \( B \) is
In a semiconductor crystal, the total number of electrons in the outer shell is 4N . At absolute zero, the number of energy states of valence and conduction band are respectively
Oxidation of gluconic acid with nitric acid gives