List of top Chemistry Questions asked in AIEEE

The ??pin-only??magnetic moment [in units of Bohr magneton,$\left(\mu_{\beta}\right)$ ] of $Ni^{2+}$ in aqueous solution would be (Atomic number of Ni = 28):
Resistance of a conductivity cell filled with a solution of an electrolyte of concentration 0.1 M is 100 $\Omega$. The conductivity of this solution is $1.29 S m^{-1}.$. Resistance of the same cell when filled with 0.2 M of the same solution is 520 $\Omega$. The molar conductivity of 0.02 M solution of the electrolyte will be:
The following mechanism has been proposed for the reaction of NO with $Br_{2}$to form NOBr : $NO\left(g\right)+Br_{2} \left(g\right) \text{rightleftharpoons} NOBr_{2} \left(g\right)$ $NOBr \left(g\right)+NO \left(g\right) \to 2NOBr \left(g\right)$ If the second step is the rate determining step, the order of the reaction with respect to NO (g) is:
The enthalpy changes for the following processes are listed below : $Cl_2 (g) = 2Cl (g), 242.3 \,kJ \,mol^{-1}$ $I_2 (g) = 21 (g),\, 151. \, kJ\, mol^{-1}$ $ICl (g) = I (g) + Cl (g),\, 211.3 \,kJ \,mol^{-1}$ $I_2(s) = I_2 (g).\, 62.76 \,kJ \,mol^{-1}$ Given that the standard states for iodine and chlorine are $I_2$ (s) and $Cl_2$ (g), the standard enthalpy of formation of $ICl$ (g) is :
How many EDTA (ethylenediaminetetra acetic acid) molecules are required to make an octahedral complex with a $Ca^{2+}$ ion ?
Which one of the following is the correct statement?
The ionic mobility of alkali metal ions in aqueous solution is maximum for :
Rate of a reaction can be expressed by Arrhenius equation as : $K=Ae^{-E/RT}$ In this equation, E represents :
Which of the following chemical reactions depicts the oxidizing behaviour of $H_{2} SO_{4}$ ?
How many moles of magnesium phosphate, $Mg_{3} \left(po_{4}\right)_{2}$ will contain 0.25 mole of oxygen atoms ?
HBr reacts with $CH_{2} =CH-OCH_{3}$ under anhydrous conditions at room temperature to give:
The organic chloro compound, which shows complete sterochemical inversion during a $ {S_{N^2}}$ reaction, is
The density (in $g\, mL^{-1}$) of a $3.60\, M$ sulphuric acid solution that is $29\%\,H_2SO_4$ (Molar mass $= 98\, g mol^{-1}$) by mass 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
A $5 .25\%$ solution of a substance is isotonic with a $1.5\%$ solution of urea (molar mass = $60 \,g \,mol^{-1})$in the same solvent. If the densities of both the solution are assumed to be equal to $1.0 \,g \,cm^{-3}$ molar mass of the substance will be
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
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
Which of the following molecules is expected to rotate the plane of plane-polarized light?
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
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?
Which of the following nuclear reactions will generate an isotope?
Which of the following reactions will yield $2, 2$-dibromopropane ?
Which one of the following conformation of cyclohexane is chiral?
The stability of dihalides of $Si, Ge, Sn $ and $Pb$ increases steadily in the sequence