List of top Chemistry Questions asked in KEAM

A solution of methanol in water is $20\%$ by volume. If the solution and pure methanol have densities of $0.964 \; kg \; L^{-1}$ and $0.793 \; kg \; L^{-1}$, respectively, find the percent of methanol by weight?
In the complex with formula $MCl_3 \cdot 4H_2O,$ the coordination number of the metal M is six and there is no molecule of hydration in it. The volume, if 0.1 M $AgNO_3$ solution needed to precipitate the free chloride ions in 200 mL of 0.01 M solution of the complex, is
Plot of $ log\text{ }x/m $ against log $p$ is a straight line inclined at an angle of $ 45{}^\circ $ . When the pressure is $ 0.5 \,arm $ and Freundlich parameter. $ k $ is $ 10 $ , the amount of solute adsorbed per gram of adsorbent will be $ (log\text{ }5=0.6990) $
A weak monobasic acid is 1% ionized in 0.1 M solution at $ 25{}^\circ C $ . The percentage of ionisation in its 0.025 M solution is
A metal M of equivalent mass E forms an oxide of molecular formula $M_x O_y$. The atomic mass of the metal is given by the correct equation
Benzonitrile can be prepared from benzaldehyde on treatment with
Intermolecular hydrogen bonding exists in

In the decomposition reaction AB\(_5\)(g)\(\rightleftharpoons\) AB\(_3\)(g) + B\(_2\)(g), at equilibrium in a 10-litre closed vessel at 227 C, 2 moles of AB\(_3\), 5 moles of B\(_2\) and 4 moles of AB\(_5\) are present. The equilibrium constant K\(_c\) for the formation of AB\(_5\)(g) is

The decomposition of ${N_2O_5}$ in ${CCl_4}$ at 318 K is studied by monitoring the concentration of ${N2O5}$ in the solution. Initially the concentration of ${N2O5}$ is 2.4 mol $L^{-1}$ and after 200 minutes, it is reduced to 2.00 mol $L^{-1}$. What is the rate of production of $NO_2$ during this period in $mol\, L^{-1} min^{-1}$ ?
The $pK_a$ of a weak acid $HA$ and $pK_b$ of a weak base $BOH$ are $4.60$ and $4.80$ respectively. The $pH$ of $0.1\, M$ solution of the salt, $BA$, formed from the acid $HA$ and base $BOH$ is
Which of the following compounds is most basic?
An aqueous solution containing $3\, g$ of a solute of molar mass $111.6 \,g\, mol ^{-1}$ in a certain mass of water freezes at $-0.125^{\circ} C$. The mass of water in grams present in the solution is $\left(K_{f}=1.86\, Kkg \,mol ^{-1}\right)$
For the reaction, $C_{(s)}+CO_{2(g)} \rightarrow 2CO_{(g)},$ $K_p = 63$ atm at $1000\, K$. If at equilibrium $P_{CO} = 10\, P{co_2},$ than the total pressure of the gases at equilibrium is
The vapour pressure of a solvent at 293 K is 100 mm Hg. Then the vapour pressure of a solution containing 1 mole of a strong electrolyte $(AB_2)$ in 99 moles of the solvent at 293 K is (assume complete dissociation of solute)
Arrange the following in the order of increasing mass (atomic mass $ O=16,Cu=63, $ $ N=14 $ ) I. One atom of oxygen II. One atom of nitrogen III. $1 \times 10^{-10}$ mole of oxygen IV. $1 \times 10^{-10}$ mole of copper
Arrange the following species in the correct order of their stability $C_2 , Li_2, O_2^{+} , He_2^{+}$
For a first order reaction, $A(g) \rightarrow B(g)$ at $35^{\circ} C$, the volume of $A$ left in reaction vessel at various times are given below. [Given data : $\log (5 / 4)=0.096$. What is the value of rate constant?
The organic halogen compound used as refrigerant in refrigerators and air-conditioners is
The correct order of reactivity of the halides, ethyl chloride $(I)$, isopropyl chloride $(II)$ and benzyl chloride $(III)$ in $S_N1$ reaction is
Among the following molecules: $SO_2,SF_4,ClF_3, BrF_5$ and $XeF_4$, which of the following shapes does not describe any of the molecules mentioned?
Two soap bubbles each with radius $r_1$ and $r_2$ coalesce in vacuum under isothermal conditions to form a bigger bubble of radius $R$. Then $R$ is equal to
Glucose on oxidation with bromine water gives
In the estimation of sulphur by Carius method, $0.480\, g$ of an organic compound gives $0.699 \,g$ of barium sulphate. The percentage of sulphur in this compound is (Atomic masses: $Ba\, = 137, S = 32, 0 = 16)$
Detergents are known to pollute rivers and waterways. However, detergents can be made biodegradable and pollution free by taking
The reaction of $ CHC{{l}_{3}} $ and alcoholic $ KOH $ with $ p $ -toluidine gives