List of top Questions asked in WBJEE- 2026

\(\theta\) elimination from the equations \[ x^{2}+y^{2}=\frac{x\cos3\theta+y\sin3\theta}{\cos^{3}\theta} =\frac{y\cos3\theta-x\sin3\theta}{\sin^{3}\theta} \] will be:
If \(\alpha, \beta\) are the roots of the equation \(x^{2}-px+q=0\) and \(\alpha>0\), \(\beta>0\), then \[ \alpha^{\frac{1}{4}}+\beta^{\frac{1}{4}}=(p+6\sqrt{q}+4q^{\frac{1}{4}}\sqrt{p+2\sqrt{q}})^{\kappa}, \] where \(\kappa\) is:
Consider the function \(y=f(x)\) defined implicitly by the equation \[ y^{3}-3y+x=0 \] on the interval \((-\infty,-2)\cup(2,\infty)\). The area of the region bounded by the curve \(y=f(x)\), the x-axis and the lines \(x=a,x=b\), where \(-\infty<a<b<-2\) is:
Which of the following plot(s) is/are correct representation(s) of Boyle's Law?
Which of the following have tetrahedral structures?
Which of the following statement(s) is/are correct?
1 mole of an ideal gas undergoes the following processes:
Process A \(\rightarrow\) Isothermal expansion at \(400\text{K}\) from volume \(V_1\) to volume \(V_2\), such that \(V_2 = 4V_1\).
Process B \(\rightarrow\) Adiabatic expansion from volume \(V_1\) to volume \(V_2\), such that \(V_2 = 4V_1\).
Consider the following statements and select the correct one/s.
Which of the following statement(s) is/are correct about the given compound?

The IUPAC name of the given compound is

\(\text{RO}-\text{CH}_2-\text{C} \equiv \text{CH} \xrightarrow{\text{X}} \xrightarrow{\text{Y}} \text{RO}-\text{CH}_2-\text{C} \equiv \text{C}-\text{CH}_2\text{CH}_2-\text{Br}\)
To carry out the above conversion X and Y are respectively
For the metal complex \([\text{Co}(\text{NH}_3)_5\text{SO}_4]\text{Br}\), coordination number, oxidation number, number of \(d\)-electrons and number of unpaired \(d\)-electrons are respectively
An organic compound undergoes first order decomposition. The time taken for its decomposition to \(\frac{1}{8}\text{th}\) and \(\frac{1}{10}\text{th}\) of its initial concentration are \(t_{1/8}\) and \(t_{1/10}\) respectively. The value of \(\left[ \frac{t_{1/8}}{t_{1/10}} \right]\) is [Given \(\log_{10} 2 = 0.3\)]
A \(5.0\text{ cm}^3\) solution of \(\text{H}_2\text{O}_2\) liberates \(1.27\text{ g}\) of iodine from an acidified \(\text{KI}\) solution. The percentage strength of \(\text{H}_2\text{O}_2\) is close to
Glucose is added to 1 litre of water to such an extent that \(\Delta T_f / K_f\) equals to \(\frac{1}{1000}\). The weight of glucose added is
The calculated magnetic moment for low spin $[\text{Ru}(\text{EDTA})]^-$ is

The mass of an electron is \(9.1\times10^{-31}\ \text{kg}\). If its K.E. is \(3.0\times10^{-25}\ \text{J}\), its wavelength is (approximately):
In the following reaction sequence, the product Y is

In a first order reaction, the concentration of reactant decreases from \(400\ \text{moles lit}^{-1}\) to \(50\ \text{moles lit}^{-1}\) in \(7.5\times10^{3}\ \text{s}\). The rate constant of the reaction is (approximately):
For the reaction \(\text{A} \rightleftharpoons \text{B}\), variation of concentration is plotted against time as shown below.
In which of the following species, \(\text{sp}^{3}\text{d}^{2}\) hybridisation is not associated?
Rank the following anions in order of decreasing nucleophilicity in a polar protic solvent (most $\rightarrow$ least nucleophilic).

The major product in the following reaction is
Which one of the following does not lose water even in conc. \(\text{H}_{2}\text{SO}_{4}\)?
The van der Waal's equation \(\left(P + \frac{a}{4V^2}\right)\left(V - \frac{b}{2}\right) = \frac{RT}{2}\) is valid for:
The products X and Y in the following reaction sequence are