List of top Chemistry Questions asked in WBJEE

Case-1: An ideal gas of molecular weight M at temperature T.
Case-2: Another ideal gas of molecular weight 2M at the temperature \(\frac{T}{2}\).
Identify the correct statement in the context of the above two cases.

The correct statement about the magnetic properties of [Fe(CN)₆]^3- and [FeF₆]^3- is

Which of the following would give a linear plot? (K is the rate constant of an elementary reaction and T is the temperature in absolute scale)

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

The conformations of n-butane, commonly known as eclipsed, gauche and anti-conformations can be interconverted by

At constant pressure, the heat of formation of a compound is not dependent on temperature, when

Which one of the following electronic arrangements is absurd ?

The correct order of the addition reaction rates of halogen acids with ethylene is

Given the standard half-cell potentials $\left(E^{\circ}\right)$ of the following as $Zn \longrightarrow Zn ^{2+}+2 e^{-} ; E^{\circ}=+0.76 \,V$ $Fe \longrightarrow Fe ^{2+}+2 e^{-} ; \quad E^{\circ}=0.41 \,V$ Then the standard e.m.f. of the cell with the reaction $Fe ^{2+}+ Zn \longrightarrow Zn ^{2+}+ Fe$ is

Which of the following is present in maximum amount in �acid rain� ?

Which one of the following is a condensation polymer?

Methoxybenzene on treatment with HI produces

Equal weights of ethane and hydrogen are mixed in an empty container at $25^{\circ}C$. The The fraction of total pressure exerted by hydrogen is

Out of the following outer electronic configurations of atoms, the highest oxidation state is achieved by which one ?

If aniline is treated with conc. $H_2SO_4$ and heated at $200^{\circ}C$, the product is

A compound formed by elements $X$ and $Y$ crystallizes in the cubic structure, where $X$ atoms are at the corners of a cube and $Y$ atoms are at the centres of the body. The formula of the compound is

$C_4H_10 O { ->[{K_2Cr_2O_7}][{H_2SO_4}] }C_4H_5O { ->[{I_2/NaOH}][{\text{Warm}}] }CHI_3$ Here, N is

Ferric ion forms a Prussian blue precipitate due to the formation of

The nucleus ${^{64}_{29}Cu}$ accepts an orbital electron to yield.