List of top Chemistry Questions asked in WBJEE

Treatment of with $NaNH_2/li \,NH_3$ gives

The increasing order of $O-N-O$ bond angle in the species $NO_2,\, NO_2^ +$ and $NO_2 ^-$ is

Tautomerism is exhibited by

The ionization energy of the hydrogen atom is $13.6\, eV$. The potential energy of the electron in $n = 2$ state of hydrogen atom is

Amongst $\left[NiCl_{4}\right]^{2-}, \left[Ni\left(H_{2}O\right)_{6}\right]^{2+},\left[Ni\left(PPh_{3}\right)_{2}Cl_{2}\right], \left[Ni\left(CO\right)_{4}\right]$ and $\left[Ni\left(CN\right)_{4}\right]^{2-}$. the paramagnetic species are

In $SOCl_2$, the $Cl-S-Cl$ and $Cl-S-O$ bond angles are

Pressure-volume $(PV)$ work done by an ideal gaseous system at constant volume is (where $E$ is internal energy of the system

The standard Gibbs free energy change $(\Delta G^\circ)$ at 25$^{\circ}$C for the dissociation of $N_2O_4(g)$ to $NO_2(g)$ is (given, equilibrium constant = $0.15, R = 8.314 \, J/K/mol)$

The best method for preparation of $Me_3CCN$ is

$2$-Methylpropane on monochlorination under photochemical condition give

In basic medium the amount of $Ni^{2+}$ in a solution can be estimated with the dimethylglyoxime reagent. The correct statement(s) about the reaction and the product is(are)

?Sulphan? is

Silicone oil is obtained from the hydrolysis and polymerisation of

Identify the CORRECT statement

Ribose and 2-deoxyribose can be differentiated by

Correct statement(s) in cases of n-butanol and t-butanol is (are)

Acid catalysed hydrolysis of ethyl acetate follows a pseudo-first order kinetics with respect to ester. If the reaction is carried out with large excess of ester, the order with respect to ester will be

For isothermal expansion of an ideal gas, the correct combination of the thermodynamic parameters will be

In diborane, the number of electrons that account for bonding in the bridges is

In borax the number of $B-O-B$ links and $B-OH$ bonds present are, respectively,

$58.4\, gm$ of $NaCl$ and $180\,gm$ of glucose were separately dissolved in $1000 \,mL$ of water. Identify the correct statement regarding the elevation of boiling point ($b.pt$) of the resulting solutions.

If the first ionization energy of $H$ atom is $13.6\, eV$, then the $2^{nd}$ ionization energy of He atom is

Which of the following solutions is an example of negative deviation from Raoult�s law?

$20\, mL\, 0.1( N )$ acetic acid is mixed with $10\, mL$ $0.1( N )$ solution of $NaOH$. The $pH$ of the resulting solution is $\left( p K_{a}\right.$ of acetic acid is $4.74$ )

The state of hybridization of the central atom and the number of lone pairs over the central atom in $POCl_{3}$ are