List of top Chemistry Questions asked in WBJEE

Increasing order of solubility of AgCl in:

• (i) H₂O
• (ii) 1M NaCl (aq)
• (iii) 1M CaCl₂ (aq)
• (iv) 1M NaNO₃ (aq)

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

The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)

For a spontaneous process, the incorrect statement is:

The equivalent weight of \(\text{Na}_2\text{S}_2\text{O}_3\) (Gram molecular weight = \(M\)) in the given reaction is:
\[\text{I}_2 + 2 \text{Na}_2\text{S}_2\text{O}_3 \rightarrow 2 \text{NaI} + \text{Na}_2\text{S}_4\text{O}_6\]

The product ’P’ in the above reaction is:

Ozonolysis of o-xylene produces:

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

The compounds A and B are respectively:

Which of the following represent(s) the enantiomer of Y?

The major product of the following reaction is:

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:

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

The compound that does not give a positive test for nitrogen in Lassaigne’s test is

The degree of dissociation of acetic acid is:

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

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

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

Number of moles of ions produced by the complete dissociation of one mole of Mohr’s salt in water is:

At \(25^\circ \text{C}\), the ionic product of water is \(10^{-14}\). The free energy change (\(\Delta G^\circ\)) for the self-ionization of water in kcal mol\(^{-1}\) is:

Which of the following statements is correct for a spontaneous polymerization reaction?

pH of 10⁻⁸ M HCl solution is:

The correct order of boiling points of the given aqueous solutions is

Which of the following statements about the S_N2 reaction mechanism is/are true?