List of top Chemistry Questions asked in WBJEE

The shape of $XeF_{5}^{-}$ will be

Which of the following is true in respect of adsorption?

The equilibrium constant for the reaction $N_{2} +3H_{2} {\rightleftharpoons} 2NH_{3}$ is ?K?. Then, the equilibrium constant for the reaction $2N_{2}+6H_{2} {\rightleftharpoons} 4NH_{3}$ will be

Which of the following compounds is least effective in precipitating $Fe\left(OH\right)_{3}$ sol.?

Consider the following reaction: $6NaOH +3cl_{2} \to5Nacl +A+3H_{2}O$ What is the oxidation number of chlorine in A?

Pressure (P) vs. density (D) curve for an ideal gas at two different temperatures $T_{1} andT_{2}$ is shown below. Identify the correct statement about $T_{1}and T_{2}$:

Amongst the following compounds, the one which would not form a white precipitate with ammonical silver nitrate solution is

Which property that polyacetylene exhibits is unusual for an organic polymer?

Which structure for $XeO_{3} \, and XeF_{4}$ are consistent with the VSEPR model?

The correct IUPAC name of $H_{3}C-C\left(CH_{3}\right)_{2} -CH =CH_{2}$ is

Among the following groupings, which one represents the set of iso-electronic species?

Which one of the following does not produce $O_{2}$ as the only gaseous product on heating?

Assign the Bravais lattice type of the following unit cell structure.

The spin-only magnetic moment of $\left[crF_{6}\right]^{4-}$ (atomic number of Cr is 24) is

Which reaction is not appropriate for the synthesis of the following?

75% of a first order reaction was completed in 32 min. When would 50% of the reaction completed?

The emf of a Daniel cell at 298 K is $E_{1}.\qquad$The cell is $Zn | ZnSO_{4} \left(0.01M\right)|| CuSO_{4} \left(1M\right) | CU$ When the concentration of $ZnSO_{4}$ is changed to 1M and that of $CuSO_{4}$ to 0.01M, the emf changes to E2.The relationship between $E_{1} and E_{2}$ will be

Of the following atoms, which one has the highest n/p ratio?

In the complex ion $\left[Cu\left(CN\right)_{4}\right]^{3-}$ the hybridization state, oxidation state and number of unpaired electrons of copper are respectively

Which of the following is the correct option for free expansion of an ideal gas under adiabatic condition?

The maximum number of 2p electrons with electronic spin $=-\frac{1}{2}$ are

For $N^{3-} >O^{2-}>F^{-} and Na^{+},$ the order in which their ionic radii varies is

The number of lone pair of electrons on the central atoms of $H_2O,\, SnCl_2,\, PCl_3$ and $XeF_2$ respectively, are

At a certain temperature, the value of the slope of the plot of osmotic pressure $(\pi)$ against concentration $\left(C\right.$ in $mol\, L ^{-1}$ ) of a certain polymer solution is $291\, R$. The temperature at which osmotic pressure is measured, is $(R$ is gas constant)

Suppose the mass of a single Ag-atom is $m$. Ag metal crystallises in fcc lattice with unit cell of length $a$. The density of $Ag$ metal in terms of $a$ and $m$ is