List of top Chemistry Questions asked in KEAM

Propene on hydroboration-oxidation gives ________.

Which of the following compounds contains two primary alcoholic and one secondary alcoholic groups? ________.

When chlorobenzene is treated with $Cl_{2}$ in the presence of anhydrous $FeCl_{3}$ catalyst, it gives a mixture of 1,2-dichlorobenzene and 1,4-dichlorobenzene. This is an example of ________.

The solvent used in Wurtz reaction is ________.

Which of the following finely divided metals can be used as catalyst in the hydrogenation of alkenes and alkynes? (i) Pt (ii) Fe (iii) Ni (iv) Pd

The empirical formula of an organic compound is $CH_{2}$. The molar mass of the compound is $56g~mol^{-1}$. The organic compound is ________.

Which one of the following is an ambidentate ligand? ________.

Which of the following complex has the least conductivity? ________.

The transition metal with the highest melting point is ________.

The transition metal ion with the highest magnetic moment is ________.

Which of the following is a basic oxide? ________.

Acidified potassium dichromate cannot oxidize ________.

Ammonium ion ($NH_4^+$) reacts with nitrite ion ($NO_2^-$). Based on the experimental data provided, which of the following is the rate law? ________.

A first order reaction is 75% completed in 6000 s. What is its half life period at the same temperature? ________.

The vapour pressure of pure benzene at a certain temperature is 0.85 bar. When 0.5 g of a non-volatile solute is added to 39 g of benzene, the vapour pressure becomes 0.845 bar. What is the molar mass of the substance? ________.

For which of the following electrode reactions the standard electrode potential is the highest at 298 K? The ions are present in aqueous solution. ________.

For $Zn(s)+Cu^{2+}(0.1M) \rightarrow Zn^{2+}(0.001 M)+Cu(s)$, calculate $E_{cell}$ if $E^0_{cell} = 1.1V$. ________.

In which of the following equilibrium $K_{P}=K_{C}$? ________.

If 'S' is the solubility of $X_{3}Y_{2}$ in pure water, the solubility product ($K_{sp}$) is ________.

Molar enthalpy change for vaporization of 1 mol of water at $100^{\circ}C$ is $41kJ~mol^{-1}$. Calculate the internal energy change ($kJ~mol^{-1}$) assuming ideal gas behavior. ________.

12g of pure graphite is burnt. Temperature rises from 298 K to 308 K. Heat capacity of the calorimeter is $20.7~kJ~K^{-1}$. Enthalpy change for combustion of 1 mole of graphite $(kJ~mol^{-1})$ is ________.

Which one of the following molecules contains two 'sigma' ($\sigma$) bonds and two 'pi' ($\pi$) bonds? ________.

The alkali metal with the highest first enthalpy of ionization is ________.

What is the total number of orbitals associated with the principal quantum number $n=3$? ________.

For any sub-shell defined by '$l$' value how many values of magnetic quantum number ($m_l$) are possible? ________.