List of practice Questions

The number of proton NMR signals for the compounds P and Q, respectively, is 

Among the following compounds, the pair of enantiomers is 

In a typical conductometric titration of a strong acid with a weak base, the curve resembles 
(Conductance vs volume of base graphs as shown in the question) 

In the following sequence of reactions, the overall yield (%) of O is 

 

The correct order of rate of solvolysis for the following compounds is 

The compounds having C$_3$-axis of symmetry are 

If $\vec{a}$ and $\vec{b}$ are unit vectors and the angle between them is $\frac{\pi}{3}$, then the magnitude of $\vec{a} - \vec{b}$ is .............
Consider an isothermal reversible compression of one mole of an ideal gas in which the pressure of the system is increased from 5 atm to 30 atm at 300 K. The entropy change of the surroundings (in J K$^{-1}$) is ______ (final answer rounded to two decimals).
The standard reduction potentials of Ce$^{4+}$/Ce$^{3+}$ and Fe$^{3+}$/Fe$^{2+}$ are 1.44 and 0.77 V, respectively. The log$_{10}K$ (K is equilibrium constant) value for the following reaction is ............. (final answer should be rounded off to two decimal places)
\[ \text{Ce}^{4+} + \text{Fe}^{2+} \rightleftharpoons \text{Ce}^{3+} + \text{Fe}^{3+} \]
A radioactive element undergoes 80% radioactive decay in 300 min. The half-life for this species in minutes is ............
Silver crystallizes in a face-centered cubic lattice. The lattice parameter of silver (in picometer) is .............
The amount of bromine (atomic wt. = 80) required (in gram) for the estimation of 42.3 g of phenol (molecular wt. = 94 g mol$^{-1}$) is .............
In 200 g of water, 0.01 mole of NaCl and 0.02 mole of sucrose are dissolved. Assuming solution to be ideal, the depression in freezing point of water (in $^\circ$C) will be ______ (final answer rounded off to two decimal places).
The adsorption of a gas follows the Langmuir isotherm with $K = 1.25$ kPa$^{-1}$ at 25 $^\circ$C. The pressure (in Pa) at which the surface coverage is 0.2 is ______
The separation of 123 planes (in nm) in an orthorhombic cell with $a = 0.25$ nm, $b = 0.5$ nm, $c = 0.75$ nm is ______ (round to two decimals).
The number of unpaired electron(s) in K$_2$NiF$_6$ is ...........
The maximum number of dipeptides that could be obtained by reaction of phenylalanine with leucine is .............
At an operating frequency of 350 MHz, the shift (in Hz) of resonance from TMS of a proton with chemical shift of 2 ppm is ...............
For a cell reaction, Pb(s) + Hg$_2$Cl$_2$(s) → PbCl$_2$(s) + 2Hg(l), $\left( \frac{\partial E^\circ}{\partial T} \right)_P$ is 1.45 × 10$^{-4}$ V K$^{-1}$. The entropy change (in J mol$^{-1}$ K$^{-1}$) for the reaction is ..........
IR active molecule(s) is/are
Intensive variable(s) is/are
Wave nature of electromagnetic radiation is observed in
The number of isomeric structures of di-substituted borazine (B$_3$N$_3$H$_4$X$_2$) is ..........
The number of S–S bond(s) in tetrathionate ion is ..........
The “heme” containing protein(s) is/are