List of top Chemistry Questions asked in WBJEE

The equivalent conductance of NaCl, HCl, and CH3COONa at infinite dilution are 126.45, 426.16, and 91 ohm-1cm2eq-1 respectively at 25°C. The equivalent conductance of acetic acid(at infinite dilution) would be
Arrange the following in order of increasing mass :
(i) 1 mole of N2, (ii) 0.5 mole of O3, (iii) \(3.011×10^{23}\) molecules of O2, (iv) 0.5 gram atom of O2
The root mean square(rms) speed of X2 gas is x m/s at a given temperature. When the temperature is doubled, the X2 molecules dissociated completely into atoms. The root mean square speed of the sample of gas then becomes (in m/s)
What is the edge length of the unit cell of a body-centred cubic crystal of an element whose atomic radius is 75 pm?
A metal ($M$) forms two oxides. The ratio $M:O$ (by weight) in the two oxides are $25:4$ and $25:6$. The minimum value of atomic mass of $M$ is
The number of atoms in body-centred and face-centred cubic unit cell respectively are
The correct statement(s) about B2H6 is/are:
Avogadro's law is valid for
The major product of the following reaction is $F_3C \rightarrow CH = CH_2 + HBr$
The product of the following reaction is:
How many monobrominated product(s) (including stereoisomers) would form in the free radical bromination of n-butane?
Oxidation states of Cr in K2Cr2O7 and CrO5 are, respectively:
Pick the correct statement:
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?
XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.
The product of the following hydrogenation reaction is:
The correct order of relative stability for the given free radical is:
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 number of unpaired electrons in $Mn^{2+}$ ion is
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 correct pair of electron affinity order is:
Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?
The metal-pair that can produce nascent hydrogen in alkaline medium is:
Sodium nitroprusside is:
Hybridisation of the negative carbons in (1) and (2) are:
Hybridisation of the negative carbons