List of top Chemistry Questions asked in KEAM

The inert gas element with the largest positive electron gain enthalpy is
The IUPAC name of element with atomic number 105 is
In which of the following spectral region Balmer series lines are observed for atomic hydrogen
When a radioactive material emits an \(\alpha\)-particle, its position in the periodic table
When blue light is incident on a certain metal surface, photoelectrons are emitted. When green light is incident on the same metal surface, no electrons are emitted. If the same metallic surface is exposed to yellow light,
Ionization potential of hydrogen atom is 13.6 eV. Hydrogen atom in the ground state initially is excited by monochromatic radiation of photon energy 12.75 eV. The number of spectral lines emitted by the hydrogen atom, according to Bohr’s theory will be
The dimensional formula for the product of the decay constant \(\lambda\) and the mean life of a radioactive substance is
Acetanilide is prepared by treating acetic anhydride/pyridine with
Which of the following amine does not react with Hinsberg’s reagent?
Aryl fluorides are prepared from diazonium salts using
Aspirin is
Which of the following is the weakest acid?
Which of the following carboxylic acid is used in rubber, textile, dyeing, leather and electroplating industries?
Intramolecular hydrogen bonding is present in
Phenol is converted into benzene by heating with
Benzaldehyde reacts with acetophenone in the presence of \(NaOH\) at 293 K to give benzalacetophenone. This reaction is an example of
When aryl halide is treated with \(Na\) in dry ether, biphenyl is formed. This reaction is called
One mole of an alkene on ozonolysis gives one mole of propan-2-one and one mole of formaldehyde. What is the alkene?
Which of the following compound is used for the manufacture of phenol in large scale?
The correct decreasing order of acidity of alkynes is
When toluene is treated with \(Cl_2\) in the presence of \(Fe\) in dark, the product formed is
The metal ion present in the Wilkinson’s catalyst is
When n-hexane is passing over $Mo_2O_3$ catalyst at 773 K and 10–20 atm pressure, the product formed is
The hydrocarbon with molecular formula $C_{20}H_{42}$
Which of the following group shows $-R$ effect?