List of top Questions asked in WBJEE

Which of the statements are incorrect?
Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?
The correct statement(s) about B2H6 is/are:
The correct order of relative stability for the given free radical is:
The correct pair of electron affinity order is:
The product of the following reaction is:
The product of the following hydrogenation reaction is:
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?
Pick the correct statement:
To a solution of colourless sodium salt, a solution of lead nitrate was added to have a white precipitate which dissolves in warm water and reprecipitates on cooling. Which of the following acid radical is present in the salt?
The correct order of acidity of the following hydra acids is:
Oxidation states of Cr in K2Cr2O7 and CrO5 are, respectively:
The boiling point of water is higher than liquid HF. The reason is that:
Hybridisation of the negative carbons in (1) and (2) are:
Hybridisation of the negative carbons
Which of the following is radioactive?
The correct relationship between molecule I and II is:
correct relationship between molecule I and II
The metal-pair that can produce nascent hydrogen in alkaline medium is:
Choose the correct statement for the [Ni(CN)4]²⁻ complex ion (Atomic no. of Ni = 28)
A sample of MgCO3 is dissolved in dilute HCl and the solution is neutralized with ammonia and buffered with NH4Cl / NH4OH. Disodium hydrogen phosphate reagent is added to the resulting solution. A white precipitate is formed. What is the formula of the precipitate?
The number of atoms in body-centred and face-centred cubic unit cell respectively are
The correct bond order of B-F bond in BF3 molecule is:
XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.
Sodium nitroprusside is:
Avogadro's law is valid for
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