List of top Chemistry Questions asked in WBJEE

Number of moles of ions produced by the complete dissociation of one mole of Mohr’s salt in water is:
For a spontaneous process, the incorrect statement is:
Which of the following statements about the SN2 reaction mechanism is/are true?
The compounds A and B are respectively:
compounds A and B
Which of the following statements is correct for a spontaneous polymerization reaction?
Which of the following statements is true about the equilibrium constant and rate constant of a single-step chemical reaction?
Metallic conductors and semiconductors are heated separately. What are the changes in conductivity?
The degree of dissociation of acetic acid 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:
The correct order of boiling points of the given aqueous solutions is
Correct solubility order of AgF, AgCl, AgBr, AgI in water is:
The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)
For a first-order reaction with rate constant k, the slope of the plot of log(reactant concentration) against time is:
The equivalent weight of \(\text{Na}_2\text{S}_2\text{O}_3\) (Gram molecular weight = \(M\)) in the given reaction is:
\[\text{I}_2 + 2 \text{Na}_2\text{S}_2\text{O}_3 \rightarrow 2 \text{NaI} + \text{Na}_2\text{S}_4\text{O}_6\]

Identify the ion having 4f\(^6\) electronic configuration.

Which hydrogen-like species will have the same radius as the 1st Bohr orbit of a hydrogen atom?
Which of the following represent(s) the enantiomer of Y?
Which of the following represent(s) the enantiomer of Y?
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.\\
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:
The compressibility factor for a van der Waals gas at high pressure is
The number(s) of -OH group(s) present in H3PO3 and H3PO4 is/are:
How many P–O–Plinkages are there in P4O10?
The product ’P’ in the above reaction is:
product p
The compound that does not give a positive test for nitrogen in Lassaigne’s test is
Q and R in the reaction sequences are respectively:
Q and R in the reaction