List of top Chemistry Questions asked in WBJEE

Sulphuryl chloride $(SO_2Cl_2)$ reacts with white phosphorus $(P_4)$ to give
The physical states of dispersed phase and dispersion medium in colloid like pesticide spray respectively are
In aqueous alkaline solution, two electron reduction of $HO^-_2$ gives
A gas can be liquefied at temperature $T$ and pressure $P$ provided
Cold ferrous sulphate solution on absorption of $NO$ develops brown colour due to the formation of
Consider the following salts: $NaCl,\, HgCl_2,\, Hg_2Cl_2,\, CuCl_2,\, CuCl$ and $AgCl$. Identify the correct set of insoluble salts in water
In a mixture, two enantiomers are found to be present in $85\%$ and $15\%$ respectively. The enantiomeric excess $(e, e)$ is
For the reaction $A+2 B \longrightarrow C$, the reaction rate is doubled, if the concentration of $A$ is doubled. The rate is increased by four times when concentrations of both $A$ and $B$ are increased by four times. The order of the reaction is
Addition of sodium thiosulphate solution to a solution of silver nitrate gives $X$ as white precipitate, insoluble in water but soluble in excess thiosulphate solution to give $Y$. On boiling in water, $Y$ gives $Z . X, Y$ and $Z$ respectively are
The RMS velocity of $CO$ gas molecules at $27^{\circ}$C is approximately $1000\, m/s$. For $N_2$ molecules at $600 \,K$ the RMS velocity is approximately
Match the flame colours of the alkaline earth metal salts in the Bunsen burner.
In the following compound, the number of ?sp? hybridized carbon is
A piece of wood from an' archaeological sample has $5.0$ counts $\min ^{-1}$ per gram of $C-14$, while a fresh sample of wood has a count of $15.0 \,min ^{-1} \,g ^{-1}$. If half-life of $C-14$ is $5770\, yr$, the age of the archaeological sample is
The protein component of a holoenzyme is known as
The compressibility factor $(Z)$ of one mole of a van der Waals gas of negligible $�a�$ value is
$\left(_{32}Ge^{76}, _{34}Se^{76}\right)$ and $\left(_{14}Si^{30}, _{16}S^{32}\right)$ are examples of
The volume of ethyl alcohol (density $1.15\, g/cc$) that has to be added to prepare $100\,cc$ of $0.5\, M$ ethyl alcohol solution in water is
The order of decreasing ease of abstraction of Hydrogen atoms in the following molecule is
Among the following statements about the molecules $X $ and $Y$, the one (s) which is (are) correct is (are)
The formal potential of $Fe ^{3+} / Fe ^{2+}$ in a sulphuric acid and phosphoric acid mixture $\left(E^{\circ}=+0.61 \,V \right)$ is much lower than the standard potential $\left(E^{\circ}=+0.77 \,V \right) .$ This is due to
The structure of $XeF_6$ is experimentally determined to be distorted octahedron. Its structure according to VSEPR theory is
The disease that occurs in mature adult human being due to deficiency of calciferol is
The $4^{th}$ higher homologue of ethane is
The hydrides of the first elements in groups $15 - 17$, namely $NH_3, H_2O$ and $HF$ respectively show abnormally high values for melting and boiling points. This is due to
To observe an elevation of boiling point of $0.05^?C$, the amount of solute (Mol. $Wt. = 100$) to be added to $100\, g$ of water $(K_b=0.5)$ is