List of practice Questions

The CORRECT combination for metalloenzymes given in Column I with their catalytic reactions in Column II is

Reaction of [Ni(CN)$_4$]$^{2-}$ with metallic potassium in liquid ammonia at –33 °C yields complex E. The geometry and magnetic behavior of E, respectively, are

Among the following, the matrices with non-zero determinant are

A pure substance M has lesser density in solid state than in liquid state. The $\Delta S_\text{fusion}$ of M is +25 J K$^{-1}$ mol$^{-1}$. The CORRECT representative Pressure–Temperature diagram for the fusion of M is

The major product formed in the following reaction is

A compound shows $^1$H NMR peaks at $\delta$-values (in ppm) 7.31 (2H), 7.21 (2H), 4.5 (2H) and 2.3 (3H). The structure of the compound is

The major product formed in the following reaction is

Spin-only magnetic moments (in BM) of [NiCl$_2$(PPh$_3$)$_2$] and [Mn(NCS)$_6$]$^{4-}$, respectively, are

For Na$^+$, Mg$^{2+}$, Al$^{3+}$ and F$^-$, the CORRECT order of ionic radii is

The CORRECT order of p$K_a$ for the compounds I to IV in water at 298 K is

For the molecule \[ \mathrm{CH_3-CH=CH-CH(OH)-CH=CH-CH=C(CH_3)_2} \] the number of all possible stereoisomers is ________.

A dilute solution prepared by dissolving a nonvolatile solute in one liter of water shows a depression in freezing point of 0.186 K. This solute neither dissociates nor associates in water. The boiling point of the solution in K (rounded off to three decimal places) is ________.
(Given: For pure water, $T_b = 373.15$ K; $K_f = 1.86$ K mol kg$^{-1}$; $K_b = 0.51$ K mol kg$^{-1}$)

The total number of microstates possible for a d$^8$ electronic configuration is ________.

For the following fusion reaction, \[ {}^1_1\text{H} + {}^1_1\text{H} \longrightarrow {}^4_2\text{He} + 2\beta^+ + 2\nu + \gamma \] The Q-value (energy of the reaction) in MeV (rounded off to one decimal place) is ________. (Given: Mass of ${}^1$H nucleus = 1.007825 u; Mass of ${}^4$He nucleus = 4.002604 u)

MgO crystallizes as rock-salt structure with unit cell length 2.12 Å. From the electrostatic model, the calculated lattice energy in kJ mol$^{-1}$ (rounded off to the nearest integer) is ________.
(Given:} $N_A = 6.022 \times 10^{23}$ mol$^{-1}$, $M = 1.748$, $\varepsilon_0 = 8.854 \times 10^{-12}$ J$^{-1}$C$^2$m$^{-1}$, charge on electron $= 1.602 \times 10^{-19}$ C{)

Calcium crystallizes in an fcc lattice of unit cell length 5.56 Å and density 1.4848 g cm$^{-3}$. The percentage of Schottky defects (rounded off to one decimal place) in the crystal is ________.
(Given: Atomic mass of Ca = 40 g mol$^{-1}$, $N_A = 6.022 \times 10^{23}$ mol$^{-1}$)

A buffer solution is prepared by mixing 0.3 M NH$_3$ and 0.1 M NH$_4$NO$_3$. If $K_b$ of NH$_3$ is $1.6 \times 10^{-5}$ at 25°C, then the pH (rounded off to one decimal place) of the buffer solution at 25°C is ________.

The dissociation constant of a weak monoprotic acid is $1.6 \times 10^{-5}$ and its molar conductance at infinite dilution is $360.5 \times 10^{-4}$ mho m$^2$ mol$^{-1}$. For 0.01 M solution of this acid, the specific conductance is $n \times 10^{-2}$ mho m$^{-1}$. The value of $n$ (rounded off to two decimal places) is ________.

The functional group(s) in reducing sugar that tests positive with Tollen’s reagent is (are)

The CORRECT Maxwell relation(s) derived from the fundamental equations of thermodynamics is (are)

The total number of optically active isomers of dichloridobis(glycinato)cobalt(III) ion is ________.

For the consecutive reaction, \[ \text{X} \xrightarrow{k_X} \text{Y} \xrightarrow{k_Y} \text{Z} \] $C_0$ is the initial concentration of X. The concentrations of X, Y, and Z at time $t$ are $C_X$, $C_Y$, and $C_Z$, respectively. The expression for the concentration of Y at time $t$ is

The CORRECT statement(s) about the species is (are)

The complex(es) that show(s) Jahn–Teller distortion is (are)