List of top Questions asked in AIEEE

A mixture of ethyl alcohol and propyl alcohol has a vapour pressure of $290\, mm$ at $300\, K$. The vapour pressure of propyl alcohol is $200\, mm$. If the mole fraction of ethyl alcohol is $0.6$, its vapour pressure (in mm) at the same temperature will be

When 20 g of naphthoic acid ($C_{11}H_8O_2$) is dissolved in 50 g of benzene (K$_f = 1.72 K kg mol^{-1}$), a freezing point depression of 2 K is observed. The van-t Hoff factor (i) is

The energies of activation for forward and reverse reactions for $ {A2 + B2<=>2AB}$ are $180\, kJ \,mol^{-1}$ and $200\, kJ\, mol^{-1}$ respectively. The presence of catalyst lowers the activation energy of both (forward and reverse) reactions by $100\, kJ\, mol^{-1}$. The enthalpy change of the reaction ($ {A2 + B2->2AB}$) in the presence of catalyst will be (in $kJ\, mol^{-1}$)

Consider the reaction, $2A + B \to$ When concentration of $B$ alone was doubled, the half-life did not change. When the concentration of $A$ alone was doubled, the rate increased by two times. The unit of rate constant for this reaction is

Let $A=\begin{vmatrix} 5& 5\alpha & \alpha \\[0.3em] 0 &\alpha &5\alpha \\[0.3em] 0 &0& 5 \end{vmatrix}$ , If $\left|\,A^2\,\right|=25$,then $\left|\,\alpha\,\right|$ equals

Charges are placed on the vertices of a square as shown. Let $\vec {E}$ be the electric field and $V$ the potential at the centre. If the charges on $A$ and $B$ are interchanged with those on $D$ and $C$ respectively, then

Which of the following molecules is expected to rotate the plane of plane-polarized light?

In a sautrated solution of the sparingly soluble strong electrolyte $AgIO_3$ (Molecular mass $= 283$) the equilibrium which sets in is $ {AgIO_{3(s)}<=>Ag^+_{(aq)} +IO^{-}_{3(aq)}}$ If the solubility product constant $K_{sp}$ of $AgIO_3$ at a given temperature is $1.0 ??10^{-8}$, what is the mass of $AgIO_3$ contained in $100\, ml$ of its saturated solution?

The $pK_a$ of a weak acid (HA) is 4.5. The pOH of an aqueous buffered solution of HA in which $50\%$ of the acid is ionized is

The equation of a tangent to the parabola $y^2 = 8x$ is $y = x + 2$. The point on this line from which the other tangent to the parabola is perpendicular to the given tangent is

One end of a thermally insulated rod is kept at a temperature $T_1$ and the other at $T_2$. The rod is composed of two sections of lengths $\ell_{1}$ and $\ell_{2}$ and thermal conductivities $k_1$ and $k_2$ respectively. The temperature at the interface of the two sections is

Which of the following nuclear reactions will generate an isotope?

Which of the following reactions will yield $2, 2$-dibromopropane ?

Which of the following transitions in hydrogen atoms emit photons of highest frequency?

Which one of the following conformation of cyclohexane is chiral?

Two identical long conducting wires $AOB$ and $COD$ are placed at right angle to each other, with one above other such that $O$ is their common point for the two. The wires carry $I_1$ and $I_2$ currents, respectively. Point $P$ is lying at distance $d$ from $O$ along a direction perpendicular to the plane containing the wires. The magnetic field at the point $P$ will be

The stability of dihalides of $Si, Ge, Sn $ and $Pb$ increases steadily in the sequence

The reaction of toluene with $Cl_2$ in presence of $FeCl_3$ gives predominantly

The displacement of an object attached to a spring and executing simple harmonic motion is given by $x = 2 ??10^{-2}\, cos\, \pi t$ metres. The time at which the maximum speed first occurs is

The compound formed as a result of oxidation of ethyl benzene by $KMnO_4$ is

The actinoids exhibits more number of oxidation states in general than the lanthanoids. This is because

Presence of a nitro group in a benzene ring

Photon of frequency $?$ has a momentum associated with it. If $c$ is the velocity of light, the momentum is

In the following sequence of reactions, $ {CH3CH2OH->[P+I_2]A->[Mg][ether]B->[HCHO]C->[H_2O]D}$ the compound $D$ is

In conversion of lime-stone to lime, $ {CaCO_3(s)->CaO(s) +CO2(g)}$ the vales of $?H^?? and $?S^?? are $+179.1\, kJ\, mol^{-1}$ and $160.2\, J/K$ respectively at $298\, K$ and $1 \,bar$. Assuming that $?H^?? do not change with temperature, temperature above which conversion of limestone to lime will be spontaneous is