List of top Questions asked in WBJEE

The major product of the following reaction is:

Consider an electron moving in the first Bohr orbit of a He\(^+\) ion with velocity \(v_1\). If it is allowed to move in the third Bohr orbit with velocity \(v_3\), determine the correct \(v_3 : v_1\) ratio.\\

The compressibility factor for a van der Waals gas at high pressure is

For a spontaneous process, the incorrect statement is:

Identify the incorrect statement among the following:

Which of the following statements is true about the equilibrium constant and rate constant of a single-step chemical reaction?

After the emission of a β-particle followed by an α-particle from \(^{214}_{83}\text{Bi}\), the number of neutrons in the atom is:

Which hydrogen-like species will have the same radius as the 1st Bohr orbit of a hydrogen atom?

For a first-order reaction with rate constant k, the slope of the plot of log(reactant concentration) against time is:

Equal volumes of aqueous solution of 0.1 M HCl and 0.2 M H₂SO₄ are mixed. The concentration of H+ ions in the resulting solution is:

Correct solubility order of AgF, AgCl, AgBr, AgI in water is:

What will be the change in acidity if:
(i) CuSO₄ is added to saturated (NH₄)₂SO₄ solution,
(ii) SbF₅ is added to anhydrous HF?

Which of the following contains the maximum number of lone pairs on the central atom?

Which of the following species exhibits both LMCT and paramagnetism?

How many P–O–Plinkages are there in P₄O₁₀?

Q and R in the reaction sequences are respectively:

pH of 10⁻⁸ M HCl solution is:

The degree of dissociation of acetic acid is:

The number(s) of -OH group(s) present in H₃PO₃ and H₃PO₄ is/are:

Which of the following ion/ions is/are diamagnetic?

Which of the following statement(s) is/are correct?

Two convex lenses (\(L_1\) and \(L_2\)) of equal focal length \(f\) are placed at a distance \(\frac{f}{2}\) apart. An object is placed at a distance \(4f\) to the left of \(L_1\) as shown in the figure. The final image is at:

Which of the following quantity has the dimension of length? (where \(h\) is Planck’s constant, \(m\) is the mass of electron and \(c\) is the velocity of light):

The internal energy of a thermodynamic system is given by \( U = a s^{4/3} v^\alpha \), where \( s \) is entropy, \( v \) is volume, and \( a \) and \( \alpha \) are constants. The value of \( \alpha \) is:

A particle of mass \( m \) moves in one dimension under the action of a conservative force whose potential energy has the form \( U(x) = \frac{\alpha x}{x^2 + \beta^2} \), where \( \alpha \) and \( \beta \) are dimensional parameters. The angular frequency \( \omega \) of the oscillation is proportional to: