List of top Chemistry Questions asked in WBJEE JENPAS UG

If dissociation constant of acetic acid is \(1.6×10^{-5}\), the hydrolysis constant of sodium acetate is

In a first order reaction, the concentration of the reactant becomes 0.0625 of its initial concentration after 2 hours. The half-life of the reaction is given by

How many atoms of an acidic hydrocarbon of molecular formula \(C_4H_4\) lie on a straight line ?

Which of the following have all equivalent canonical structures ?

How could you increase the extent of adsorption (gas adsorbed per unit mass of solid) of a gas on a solid surface in case of physisorption ?

The product(s) formed in the following reaction is (are):

The dimension of the coefficient of viscosity is given by

Which of the following statements about \(P_4O_6\) and \(P_4O_{10}\)are correct?

Which of the following aqueous mixtures will function as buffer ?

Two separate bulbs contain ideal gas A and B respectively. The density of gas A is twice that of B and the molar mass of gas A is half that of B. If the two gases are at the same temperature, the ratio of pressure of A to that of B is

Conjugate acid and conjugate base of \(HO(CH_2)_3NH_2\) are respectively

The total number of all the isomers possible for tribromobenzene is

Among the following compounds the compound which has the highest solubility in water is

The pair of molecules having identical shape is

During extraction of copper (Cu) from its sulphide ore, which of the following compound is used to reduce the Cu₂O to Cu ?

Which reagent will be used to remove \(SO_4^{2-}\) ion from the solution containing \(SO_4^{2-}\) and \(Cl^-\) ions?

IUPAC name of the following organic compound is

The standard reduction potentials (Eº) for the following half-cell reactions are
\(Zn^{2+} +2e\rightleftharpoons Zn \space Eº = -0.76 V\)
\(Fe^{2+}+ 2e \rightleftharpoons Fe \space Eº = -0.44 V\)
The (Eº) for the cell reaction \(Fe^{2+} + Zn → Fe+Zn^{2+}\) will be

In which of the following compounds, iron (Fe) has the lowest oxidation state ?

Which of the following is not paramagnetic ?

Which anion will be formed when ethyl 3-oxobutanate is treated with alkali?

For a reaction, the rate constant K. is expressed as log₁₀ K=14.2-C/T. Activation energy of the reaction is

Consider the above reaction; which one of the following compounds does not produce acetanilide from aniline?

The Product 'A' is

Which of the following compounds can exhibit geometrical isomerism ?