List of top Chemistry Questions asked in KEAM

5 moles of an ideal gas at $100,K$ are allowed to undergo reversible adiabatic compression till its temperature becomes $200,K$. If $C_v=30,J,K^{-1}mol^{-1}$, calculate $\Delta U$ and $\Delta (pV)$ for this process. $(R=8.0,J,K^{-1}mol^{-1})$
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 ($h=6.625\times10^{-34},Js,\ c=3\times10^8,ms^{-1}$)
$3.0,g$ of a salt of molecular weight $30$ is dissolved in $250,mL$ of water. The molarity of the solution is
The quantum number symbols are given in List-I and the informations about them are given in List-II. The correct match is}
Which of the following represents the correct increasing order of first ionization enthalpy for Ca, Ba, S, Se and Ar?
The energy of the electron in third excited state of the hydrogen atom is
The work function of a material that has the threshold frequency of \(5 \times 10^{14} \, Hz\) is (\(h = 6.626 \times 10^{-34}\) Js).
Benzenamine reacts with ethanoic anhydride to give
An aliphatic amine reacts with Hinsberg's reagent to give a product insoluble in NaOH. The amine is
When ethanamide is treated with \(Br_{2}\) and NaOH in ethanolic solution we get.
Which of the following undergoes haloform reaction?
Benzaldehyde reacts with \(HNO_{3}/H_{2}SO_{4}\) at 273–283 K to give.
The common name of propanedioic acid is
Intramolecular hydrogen bond is present in
The compound with the lowest pKa value is
2-Bromopropane reacts with Mg in dry ether to give a product which on treatment with HCHO forms an addition product. The addition product on hydrolysis forms
Which of the following organic halogen compound has high reactivity towards \(S_N1\) mechanism?
Grignard reagent is prepared by the action of
The most acidic hydrogen is present in
Which of the following is a didentate ligand?
Eclipsed and staggered forms of n-butane are
When 0.25 g of an organic compound is completely oxidised with excess oxygen, 0.22 g of \(CO_{2}\) is produced. What is the percentage of carbon in the compound?
When ethene is treated with \(H_{2}\) in the presence of a catalyst, ethane is formed. This reaction is an example of.
The rate equation for the reaction \(xA + yB \rightarrow mC + nD\) is rate \(= k[A]^{1/2}[B]^{3/2}\). What is the total order of the reaction?