List of top Questions asked in WBJEE- 2022

Which of the following is radioactive?
The correct order of acidity of the following hydra acids is:
The product of the following hydrogenation reaction is:
The above conversion can be carried out by:
The metal-pair that can produce nascent hydrogen in alkaline medium is:
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?
Which of the following would produce enantiomeric products when reacted with methyl magnesium iodide?
Choose the correct statement for the [Ni(CN)4]²⁻ complex ion (Atomic no. of Ni = 28)
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
Which of the following is the correct set of four quantum numbers ($n$, $l$, $m$, $s$)?
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?
A particle is subjected to two simple harmonic motions in the same direction having equal amplitudes and equal frequency. If the resultant amplitude is equal to the amplitude of the individual motion, the phase difference $(\delta)$ between the two motions is
How many monobrominated product(s) (including stereoisomers) would form in the free radical bromination of n-butane?
As shown in the figure, a rectangular loop of length $a$ and width $b$ and made of a conducting material of uniform cross-section is kept in a horizontal plane where a uniform magnetic field of intensity $B$ is acting vertically downward. The resistance per unit length of the loop is $\lambda \, \Omega / m$. If the loop is pulled with uniform velocity $v$ in a horizontal direction, which of the following statement(s) is/are true?
rectangular loop of length 'a' and width 'b' and made of a conducting material of uniform cross-section
The boiling point of water is higher than liquid HF. The reason is that:
One mole of a diatomic ideal gas undergoes a process shown in the P-V diagram. The total heat given to the gas (In 2 = 0.7) is:
One mole of a diatomic ideal gas undergoes a process
$1$ 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)
One mole of an ideal monatomic gas expands along the polytrope $P V^3 = \text{constant}$ from $V_1$ to $V_2$ at a constant pressure $P_1$. The temperature during the process is such that molar specific heat $C_v = \frac{3R}{2}$. The total heat absorbed during the process can be expressed as
During the preparation of NH3 in Haber’s process, the promoter(s) used is/are:
The electric potential for an electric field directed parallel to the X-axis is shown in the figure. Choose the correct plot of electric field strength.
The enol form in which ethyl-3-oxobutanoate exists is
XeF2, NO2, HCN, ClO2, CO2 Identify the non-linear molecule-pair from the above mentioned molecules.
$C_6H_6(\text{liquid}) + \frac{15}{2} O_2(\text{gas}) \rightarrow 6 CO_2(\text{gas}) + 3 H_2O(\text{liquid})$ 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?
Pick the correct statement:
The correct order of relative stability for the given free radical is: