List of top Chemistry Questions asked in WBJEE

Hybridisation of the negative carbons in (1) and (2) are:
Hybridisation of the negative carbons
Oxidation states of Cr in K2Cr2O7 and CrO5 are, respectively:
What is the correct order of acidity of salicylic acid, 4-hydroxybenzoic acid, and 2,6-dihydroxybenzoic acid?
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?
The correct order of relative stability of the given conformers of n-butane is
order of relative stability
The major product of the following reaction is $F_3C \rightarrow CH = CH_2 + HBr$
The correct order of relative stability for the given free radical is:
The product of the following hydrogenation reaction is:
$1$ mL of water has $25$ drops. Let $N_A$ be the Avogadro number. What is the number of molecules present in $1$ drop of water? (Density of water = $1$ g/mL)
The product of the following reaction is:
How many monobrominated product(s) (including stereoisomers) would form in the free radical bromination of n-butane?
The enol form in which ethyl-3-oxobutanoate exists is
Which of the statements are incorrect?
Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?
The de-Broglie wavelength ($\lambda$) for electron ($e$), proton ($p$), and He²⁺ ion ($\alpha$) are in the following order, Speed of $e$, $p$, and $\alpha$ are the same
The above conversion can be carried out by:
The correct statement(s) about B2H6 is/are:
The correct order of acidity of the following hydra acids is:
$C_6H_6(\text{liquid}) + \frac{15}{2} O_2(\text{gas}) \rightarrow 6 CO_2(\text{gas}) + 3 H_2O(\text{liquid})$ Benzene burns in oxygen according to the above equation. What is the volume of oxygen (at STP) needed for complete combustion of $39$ grams of liquid benzene?
Compounds with spin-only magnetic moment equivalent to five unpaired electrons are
The kinetic study of a reaction like vA $\to$ P at 300 K provides the following curve, where concentration is taken in mol dm$^-3$ and time in min. Identify the correct order(n) and rate constant(k) :
In the Bayer�s process, the leaching of alumina is done by using
Identify the correct statement(s):
A copper coin was electroplated with Zn and then heated at high temperature until there is a change in colour. What will be the resulting colour ?
The compound(s), capable of producing achiral compound on heating at 100°C is/are