AIEEE 2004 (Chemistry) Mock Test

Which of the following sets of quantum numbers is correct for an electron in a $4f$ orbital?

Consider the ground state of a $\text{Cr}$ atom ($Z=24$). The number of electrons with azimuthal quantum numbers $l=1$ and $l=2$ are respectively:

Which one of the following ions has the highest value of ionic radius?

The wavelength of the radiation emitted, when in a hydrogen atom an electron falls from infinity to stationary state $1$, would be (Rydberg constant $R=1.097\times 10^7{\text{m}}^{-1}$):

The correct order of bond angles (smallest first) in ${\text{H}}_2\text{S},{\text{NH}}_3,{\text{BF}}_3$ and ${\text{SiH}}_4$ is:

Which one of the following sets of ions represents a collection of isoelectronic species?

Among ${\text{Al}}_2{\text{O}}_3,{\text{SiO}}_2,{\text{P}}_2{\text{O}}_3$ and ${\text{SO}}_2$ the correct order of acid strength is:

The bond order in $\text{NO}$ is $2.5$ while that in ${\text{NO}}^{+}$ is $3$. Which of the following statements is true for these two species?

The formation of the oxide ion ${\text{O}}^{2-}(g)$ requires first an exothermic and then an endothermic step as shown below:
$\text{O}(g)+e^{-}\to {\text{O}}^{-}(g);\Delta H^{\circ }=-142{\text{kJ mol}}^{-1}$
${\text{O}}^{-}(g)+e^{-}\to {\text{O}}^{2-}(g);\Delta H^{\circ }=844{\text{kJ mol}}^{-1}$
The second step is endothermic because:

The states of hybridization of boron and oxygen atoms in boric acid (${\text{H}}_3{\text{BO}}_3$) are respectively:

Which one of the following has a regular tetrahedral structure?

Of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one?

As the temperature is raised from $20^{\circ }\text{C}$ to $40^{\circ }\text{C}$, the average kinetic energy of neon atoms changes by a factor of:

The maximum number of $90^{\circ }$ angles between bond pair of electrons is observed in:

Which one of the following aqueous solutions will exhibit the highest boiling point?

Which among the following factors is the most important in making fluorine the strongest oxidizing halogen?

In the van der Waals equation of state for a gas, the constant '$b$ ' is a measure of:

The conjugate base of ${\text{H}}_2{\text{PO}}_4^{-}$ is:

$6.02\times 10^{20}$ molecules of urea are present in $100\text{ml}$ of its solution. The concentration of the urea solution is:

To neutralize completely $20\text{mL}$ of $0.1\text{M}$ aqueous solution of phosphorous acid (${\text{H}}_3{\text{PO}}_3$), the volume of $0.1\text{M}$ aqueous $\text{KOH}$ solution required is:

For which of the following parameters would the structural isomers ${\text{C}}_2{\text{H}}_5\text{OH}$ and ${\text{CH}}_3{\text{OCH}}_3$ be expected to have the same values? (Assume ideal behavior)

Which of the following liquid pairs shows a positive deviation from Raoult’s law?

Which one of the following statements is false?

What type of crystal defect is indicated in the diagram below?
${\text{Na}}^{+}{\text{Cl}}^{-}{\text{Na}}^{+}{\text{Cl}}^{-}{\text{Na}}^{+}{\text{Cl}}^{-}$
${\text{Cl}}^{-}\square {\text{Cl}}^{-}{\text{Na}}^{+}{\text{Cl}}^{-}{\text{Na}}^{+}$
${\text{Na}}^{+}{\text{Cl}}^{-}{\text{Na}}^{+}\square {\text{Na}}^{+}{\text{Cl}}^{-}$
${\text{Cl}}^{-}{\text{Na}}^{+}{\text{Cl}}^{-}{\text{Na}}^{+}{\text{Cl}}^{-}{\text{Na}}^{+}$

An ideal gas expands in volume from $1\times 10^{-3}{\text{m}}^3$ to $1\times 10^{-2}{\text{m}}^3$ at $300\text{K}$ against a constant pressure of $1\times 10^5{\text{Nm}}^{-2}$. The work done is:

In a hydrogen – oxygen fuel cell, combustion of hydrogen occurs to:

In a first order reaction, the concentration of the reactant decreases from $0.8\text{M}$ to $0.4\text{M}$ in $15$ minutes. The time taken for the concentration to change from $0.1\text{M}$ to $0.025\text{M}$ is:

What is the equilibrium expression for the reaction ${\text{P}}_4(s)+5{\text{O}}_2(g)\rightleftharpoons {\text{P}}_4{\text{O}}_{10}(s)$?

For the reaction, $\text{CO}(g)+{\text{Cl}}_2(g)\rightleftharpoons {\text{COCl}}_2(g)$ the $\frac{K_p}{K_c}$ is equal to:

The equilibrium constant for the reaction ${\text{N}}_2(g)+{\text{O}}_2(g)\rightleftharpoons 2\text{NO}(g)$ at temperature $T$ is $4\times 10^{-4}$. The value of $K_c$ for the reaction $\text{NO}(g)\rightleftharpoons \frac{1}{2}{\text{N}}_2(g)+\frac{1}{2}{\text{O}}_2(g)$ at the same temperature is:

The rate equation for the reaction $2\text{A}+\text{B}\to \text{C}$ is found to be: $\text{rate}=k[\text{A}][\text{B}]$. The correct statement in relation to this reaction is that the:

Consider the following $E^{\circ }$ values:$E_{{\text{Fe}}^{3+}/{\text{Fe}}^{2+}}^{\circ }=0.77\text{V}$$E_{{\text{Sn}}^{2+}/\text{Sn}}^{\circ }=-0.14\text{V}$ Under standard conditions the potential for the reaction:$\text{Sn}(s)+2{\text{Fe}}^{3+}(aq)\to 2{\text{Fe}}^{2+}(aq)+{\text{Sn}}^{2+}(aq)$ is:

The molar solubility product of a salt ${\text{A}}_2{\text{B}}_3$ is $K_{sp}$. The solubility '$s$ ' is given in terms of $K_{sp}$ by the relation:

The standard e.m.f. of a cell, involving one electron change is found to be $0.591\text{V}$ at $25^{\circ }\text{C}$. The equilibrium constant of the reaction is ($F=96,500{\text{C mol}}^{-1};R=8.314{\text{JK}}^{-1}{\text{mol}}^{-1}$):

The enthalpies of combustion of carbon and carbon monoxide are $-393.5$ and $-283{\text{kJ mol}}^{-1}$ respectively. The enthalpy of formation of carbon monoxide per mole is:

The limiting molar conductivities ${\Lambda }^{\circ }$ for $\text{NaCl},\text{KBr}$ and $\text{KCl}$ are $126,152$ and $150{\text{S cm}}^2{\text{mol}}^{-1}$ respectively. The ${\Lambda }^{\circ }$ for $\text{NaBr}$ is:

In a cell that utilizes the reaction $\text{Zn}(s)+2{\text{H}}^{+}(aq)\to {\text{Zn}}^{2+}(aq)+{\text{H}}_2(g)$, the addition of ${\text{H}}_2{\text{SO}}_4$ to the cathode compartment will:

Which one of the following statements regarding helium is incorrect?

Identify the correct statements regarding enzymes:

One mole of magnesium nitride on reaction with an excess of water gives:

Which one of the following ores is best concentrated by the froth – floatation method?

Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in:

Aluminium chloride exists as a dimer, ${\text{Al}}_2{\text{Cl}}_6$, in solid state as well as in solutions of non-polar solvents such as benzene. When dissolved in water, it gives:

The soldiers of Napoleon's army while at Alps during freezing winter suffered a serious problem as regards to the tin buttons of their uniforms. White metallic tin buttons got converted to grey powder. This transformation is related to:

The $E_{{\text{M}}^{3+}/{\text{M}}^{2+}}^{\circ }$ values for $\text{Cr, Mn, Fe}$ and $\text{Co}$ are $-0.41,+1.57,+0.77$ and $+1.97\text{V}$ respectively. For which one of these metals is the change in oxidation state from $+2$ to $+3$ easiest?

Excess $\text{KI}$ reacts with ${\text{CuSO}}_4$ solution and then ${\text{Na}}_2{\text{S}}_2{\text{O}}_3$ solution is added to it. Which of the following statements is incorrect for this reaction?

Among the properties (a) reducing (b) oxidizing (c) complexing, the set of properties shown by ${\text{CN}}^{-}$ ion towards metal species is:

The coordination number of the central metal atom in a complex is determined by:

Which one of the following complexes is an outer orbital complex?

Coordination compounds have great importance in biological systems. In this context which of the following statements is incorrect?

Cerium ($Z=58$) is an important member of the lanthanoids. Which of the following statements about cerium is incorrect?

Which one of the following has the largest number of isomers?

The correct order of magnetic moments (spin only values in B.M.) among the following is:
(Atomic numbers: $\text{Mn}=25;\text{Fe}=26,\text{Co}=27$)

Consider the following nuclear reactions:${}_{92}^{238}\text{M}\to {}_y^x\text{N}{+}_2^4\text{He}$${}_y^x\text{N}\to {}_B^A\text{L}+2{\beta }^{+}$ The number of neutrons in the element $\text{L}$ is:

The half – life of a radioisotope is four hours. If the initial mass of the isotope was $200\text{g}$, the mass remaining after $24$ hours undecayed is:

The compound formed in the positive test for nitrogen with the Lassaigne solution of an organic compound is:

The ammonia evolved from the treatment of $0.30\text{g}$ of an organic compound for the estimation of nitrogen was passed in $100\text{mL}$ of $0.1\text{M}$ sulphuric acid. The excess of acid required $20\text{mL}$ of $0.5\text{M}$ sodium hydroxide solution for complete neutralization. The organic compound is:

Which one of the following has the minimum boiling point?

The IUPAC name of the compound shown below is:

Which one of the following does not have $s{p}^2$ hybridized carbon?

Which of the following will have a meso-isomer also?

The rate of the reaction is fastest when $Z$ is:

Amongst the following compounds, the optically active alkane having the lowest molecular mass is:

Consider the acidity of the following carboxylic acids:
(1) $\text{PhCOOH}$
(2) $\text{o}–{\text{NO}}_2{\text{C}}_6{\text{H}}_4\text{COOH}$
(3) $\text{p}–{\text{NO}}_2{\text{C}}_6{\text{H}}_4\text{COOH}$
(4) $\text{m}–{\text{NO}}_2{\text{C}}_6{\text{H}}_4\text{COOH}$
Which one is the most acidic?

Which of the following is the strongest base?

Which base is present in RNA but not in DNA?

The compound formed on heating chlorobenzene with chloral in the presence of concentrated sulphuric acid is:

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is:

Acetyl bromide reacts with an excess of ${\text{CH}}_3\text{MgI}$ followed by treatment with a saturated solution of ${\text{NH}}_4\text{Cl}$ to give:

Which one of the following is reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?

Which of the following undergoes a reaction with $50\%$ sodium hydroxide solution to give the corresponding alcohol and acid?

Among the following compounds, which can be dehydrated very easily?

Which of the following compounds is not chiral?

Insulin production and its action in the human body are responsible for the level of diabetes. This compound belongs to which of the following categories?

Smog is essentially caused by the presence of: