List of top Chemistry Questions asked in KEAM

Acetic acid dimerizes when dissolved in benzene. As a result boiling point of the solution rises by $0.36^{\circ}C$, when $100\, g$ of benzene is mixed with "X" g of acetic acid. In this solution, if experimentally measured molecular weight of acetic acid is 117.8 and molar elevation constant of benzene is $2.57\, K\, kg\, mol^{-1}$, what is the weight % and degree of dissociation (in %) of acetic acid in benzene?
The rate law for the reaction $2X + Y \rightarrow Z$ is Rate $= A[X][Y1$. The correct statement with regard to this relation is
The inversion of cane sugar is first order in [sugar] and proceeds with half-life of 600 minutes at pH = 4 for a given concentration of sugar. However, if pH = 5, the half-life changes to 60 minutes. The rate law expression for the sugar inversion can be written as
For the reaction A + B $\rightarrow$ C + 2D , experimental results were collected for three trials and the data obtained are given below. The correct rate law of the reaction is
The rate law for the reaction $xA + yB \longrightarrow mP + nQ$ is rate = $k [A]^c[B]^d.$ What is the total order of the reaction?
In a zero order reaction for every $10^{\circ}$C rise of temperature, the rate is doubled. If the temperature is increased from $10^{\circ}$C to $100^{\circ}$C, the rate of the reaction will become .
The unit, $mol \, L^{-1} \, s^{-1}$ is meant for the rate constant of the reaction having the order
The half-life of a reaction is inversely proportional to the square of the initial concentration of the reactant. Then the order of the reaction is
$ln \frac{k_2}{k_1} = - \frac{E_a}{R} \bigg( \frac{1}{T_2} - \frac{1}{T_1} \bigg) $Consider the following statements : $1$. increase in concentration of reactant increases the rate of a zero order reaction $2$. rate constant $k$ is equal to collision frequency $A$ if $E_a = 0$. $3$. rate constant $k$ is equal to collision frequency $A$ if $E_a = \infty$ $4$. In $k\, vs\, T$ is a straight line $5$. In $k\, vs\, 1/T$ is a straight line Correct statements are
The potential energy diagrams for four reactions are given below Which one of the following statements about these diagrams is incorrect?
The rate constant for a first order reaction becomes six times when the temperature is raised from 350 K to 400 K. Calculate the activation energy for the reaction $ ( R = 8.314 JK^{ - 1} \, mol^{ - 1} )$
A mixture of ethane and ethene occupies $41\,L$ at $1\,atm$ and $500\, K$. The mixture reacts completely with $ \frac{10}{3} $ mole of $ {{O}_{2}} $ to produce $ C{{O}_{2}} $ and $ {{H}_{2}}O $ . The mole fraction of ethane and ethene in the mixture are respectively ($R\, =\, 0.082\, L \,atm$ $ {{K}^{-1}}mo{{l}^{-1}} $ )
How much time (in hours) would it take to distribute one Avogadro number of wheat grains, if $ {{10}^{20}} $ grains are distributed each second?
What is the percentage of cation in ammonium dichromate ?
Which element has the highest first ionization potential?
The molecule which has highest bond order is
$ C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}OH $ and $ {{H}_{3}}CC{{H}_{2}}OC{{H}_{3}} $ are:
At 25$^{\circ}$C, the solubility product of Hg$_2Cl_2$ in water is $3.2 \times 1^{-17} mol^3 dm^{-9}$ What is the solubility of Hg$_2Cl_2$ in water at 25$^{\circ}$C?
When $H_2O_2$ is added to an acidified $K_2Cr_2O_7$ solution
Cheilosis and digestive disorders are due to the deficiency of
The first artificial disintegration of an atomic nucleus was achieved by:
Which of the following hexoses will form the same osazone when treated with excess phenyl-hydrazine?
Which of the following is/are true? (A) Sucrose is a non-reducing sugar. (B) Glucose is oxidised by bromine water. (C) Glucose rotates plane polarized light in clockwise $ \, \, \, $direction. (D) Fructose is oxidised by bromine water. Select the correct answer using the coded given below.
Which of the following pairs can be distinguished by sodium hypoiodite?
Which of the following transition metals of 3 series has the lowest melting point?