List of top Chemistry Questions asked in WBJEE

Which one of the following has the lowest ionization energy?
The correct order of decreasing acidity of nitrophenols will be
The bond order of $CO$ molecule is
On mixing certain alkane with chlorine and irradiating it with ultraviolet light,it forms only one mono-chloroalkane. The alkane is :
Which of the following orders regarding ionization energy is correct ?
When a manganous salt is fused with a mixture of $KNO_3$ and solid $NaOH$ the oxidation number of $Mn$ changes from $+2$ to
In hemoglobin the metal ion present is
$P_4O_{10}$ is the anhydride of
Keto-enol tautomerism is not observed in
The potential of a hydrogen electrode at $pH = 10$ is
For a reversible chemical reaction where the forward process is exothermic, which of the following statements is correct ?
The molarity of a $NaOH$ solution by dissolving $4 \,g$ of it in $250\, ml$ water is
In the reaction of sodium thiosulphate with $I_2$ in aqueous medium, the equivalent weight of sodium thiosulphate is equal to
$0.1\, (M)\, HCl$ and $0.1\, (M)\, H_2SO_4$ each of volume $2ml$ are mixed and the volume is made up to $6\, ml$ by adding $2\,ml$ of $0.01\, (N)\, NaCl$ solution. The $pH$ of the resulting mixture is
Calculate $K_{C}$ for the reversible process given below if $K_{P}=167$ and $T=800^{\circ} C$ $CaCO _{3}( s ) \rightleftharpoons CaO ( s )+ CO _{2}( g )$
At identical temperature and pressure, the rate of diffusion of hydrogen gas is $3\sqrt{3}$ times that of a hydrocarbon having molecular formula $C_{n}H_{2n-2}$. What is the value of $'n'$ ?
Which of the following thermodynamic relation is correct ?
Which of the following is most abundant in the earth's crust ?
In Periodic Table, the basic character of oxides
If a species has $16$ protons, $18$ electrons and $16$ neutrons, find the species and its charge
In Sommerfeld?s modification of Bohr?s theory, the trajectory of an electron in a hydrogen atom is
The half-life of a radioactive element is 10 hours. How much will be left after 4 hours in 1 g atom sample?
Of the following compounds the most acidic is
The monomer used to produce orlon is
The catalyst used for olefin polymerization is