List of top Chemistry Questions asked in WBJEE

Metal ion responsible for the Minamata disease is
The compound that will have a permanent dipole moment among the following is
When phenol is treated with $D_2SO_4/D_2O$, some of the hydrogens get exchanged. The final product in this exchange reaction is
Two gases $X$ (Mol. Wt. $M_x$) and $Y$ (Mol. Wt. $M_Y; M_Y > M_x$) are at the same temperature T in two different containers. Their root mean square velocities are $C_X$ and $C_Y$ respectively. If the average kinetic energies per molecule of two gases $X$ and $Y$ are $E_x$ and $E_Y$ respectively, then which of the following relation (s) is (are) true?
The bond angle in $NF _{3}\left(102.3^{\circ}\right)$ is smaller than $NH _{3} (107.2 \left.^{\circ}\right)$. This is because of
The number of amino acids and number of peptide bonds in a linear tetrapeptide (made of different amino acids) are respectively
For a spontaneous process, the correct statement(s) is (are)
At $25^{\circ} C$, the molar conductance of $0.007\, M$ hydrofluoric acid is $150$ mho $cm ^{2} \,mol ^{-1}$ and its $\Lambda_{m}^{\circ}=500$ mho $cm ^{2} \,mol ^{-1}$. The value of the dissociation constant of the acid at the given concentration at $25^{\circ} C$ is
The ore chromite is
Treatment of with $NaNH_2/li \,NH_3$ gives
The increasing order of $O-N-O$ bond angle in the species $NO_2,\, NO_2^ +$ and $NO_2 ^-$ is
The ionization energy of the hydrogen atom is $13.6\, eV$. The potential energy of the electron in $n = 2$ state of hydrogen atom is
Tautomerism is exhibited by
Amongst $\left[NiCl_{4}\right]^{2-}, \left[Ni\left(H_{2}O\right)_{6}\right]^{2+},\left[Ni\left(PPh_{3}\right)_{2}Cl_{2}\right], \left[Ni\left(CO\right)_{4}\right]$ and $\left[Ni\left(CN\right)_{4}\right]^{2-}$. the paramagnetic species are
$2$-Methylpropane on monochlorination under photochemical condition give
Pressure-volume $(PV)$ work done by an ideal gaseous system at constant volume is (where $E$ is internal energy of the system
The standard Gibbs free energy change $(\Delta G^\circ)$ at 25$^{\circ}$C for the dissociation of $N_2O_4(g)$ to $NO_2(g)$ is (given, equilibrium constant = $0.15, R = 8.314 \, J/K/mol)$
In basic medium the amount of $Ni^{2+}$ in a solution can be estimated with the dimethylglyoxime reagent. The correct statement(s) about the reaction and the product is(are)
In $SOCl_2$, the $Cl-S-Cl$ and $Cl-S-O$ bond angles are
The best method for preparation of $Me_3CCN$ is
?Sulphan? is
Silicone oil is obtained from the hydrolysis and polymerisation of
Ribose and 2-deoxyribose can be differentiated by
Identify the CORRECT statement
Correct statement(s) in cases of n-butanol and t-butanol is (are)