List of top Chemistry Questions asked in WBJEE

The boiling point of water is higher than liquid HF. The reason is that:
In Bohr's model of the atom, the radius of a hydrogen atom in the ground state is $r_1$ and the radius of a He+ ion in the ground state is $r_2$. Which of the following is correct?
The correct order of relative stability for the given free radical is:
The correct order of relative stability of the given conformers of n-butane is
order of relative stability
What is the correct order of acidity of salicylic acid, 4-hydroxybenzoic acid, and 2,6-dihydroxybenzoic acid?
The average speed of $H_2$ at $T_1$ K is equal to that of $O_2$ at $T_2$ K. The ratio $T_1:T_2$ is
The product of the following hydrogenation reaction is:
Oxidation states of Cr in K2Cr2O7 and CrO5 are, respectively:
The metal-pair that can produce nascent hydrogen in alkaline medium is:
The number of atoms in body-centred and face-centred cubic unit cell respectively are
The correct order of acidity of the following hydra acids is:
Hybridisation of the negative carbons in (1) and (2) are:
Hybridisation of the negative carbons
How many monobrominated product(s) (including stereoisomers) would form in the free radical bromination of n-butane?
The correct relationship between molecule I and II is:
correct relationship between molecule I and II
Which of the following is radioactive?
The product of the following reaction is:
The number of unpaired electrons in $Mn^{2+}$ ion is
The correct pair of electron affinity order is:
XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.
How much solid oxalic acid (molecular weight $126$) has to be weighed to prepare $100$ mL of exactly $0.1$ N oxalic acid solution in water?
Pick the correct statement:
The above conversion can be carried out by:
The enol form in which ethyl-3-oxobutanoate exists is
Avogadro's law is valid for
Let (Cms)H2 be the r.m.s speed of H2 at 150 K. At what temperature, the most probable speed of helium [(Cmp)He] will be half of (Crms)H2?