List of top Chemistry Questions asked in WBJEE

The normality of $30$ volume $H_2O_2$ is

If the equilibrium constants of the following equilibria ${SO_{2(g)} +\frac{1}{2}O2 <=> SO3$ $ and\, 2SO_{3(g)} <=> 2SO_{2(g)} +O_{2(g)}}$ are given by $K_1$ and $K_2$ respectively, which of the following relations is correct

Two soap bubbles of radii $x$ and $y$ coalesce to constitute a bubble of radius $z$. Then $z$ is equal to

Two aromatic compounds having formula $C_7H_8O$ which are easily identifiable by $FeCl_3$ solution test (violet colouration) are

Reaction of formaldehyde and ammonia gives

Which of the following compounds has maximum volatility?

The amount of the heat released when $20\,mL$ $0.5\, M\, NaOH$ is mixed with $100\, mL\, 0.1\, M\, HCl$ is $x\, kJ$. The heat of neutralization is

The ease of Nitration of the following three hydrocarbons follows the order

If the molecular wt. of $Na_2S_2O_3$ and $I_2$ are $M_1$ and $M_2$ respectively, then what will be the equivalent wt. of $Na_2S_2O_3$ and $I_2$ in the following reaction? $\ce{2S2O^{2-}_3 + I2-> S4O^{2-}_6 + 2I-}$

Which one of the following will show optical isomerism?

Among the alkenes which one produces tertiary butyl alcohol on acid hydration

The ease of dehydrohalogenation of alkyl halide with alcoholic $KOH$ is

Hybridization of $C_2$ and $C_3$ of $H_3C - CH = C = CH - CH_3$ are

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