List of top Chemistry Questions asked in WBJEE

A compound contains two types of atoms $A$ and $B$. Its crystal structure is a cubic lattice with '$A$' atoms at the corner of the unit cells and '$B$' atoms at the body centres. The simplest formula of the compound will be
Which one of the following cations gives a chocolate brown precipitate upon addition of aqueous solution of \(\text{K}_4[\text{Fe}(\text{CN})_6]\)?
How many isomers can a compound with molecular formula \( \text{C}_3\text{H}_5\text{Br} \) have?
Peroxide ion is
Which of the following is the structure of pyrosulphuric acid?
The van’t Hoff Factor (i) for a dilute aqueous solution of \( \text{Na}_2\text{SO}_4 \) is
Indicate the major product of the following reaction:

\

In a conductance experiment, aqueous \( \text{AgNO}_3 \) solution is added to aqueous \( \text{KCl} \) solution gradually and simultaneously the molar conductivity (\( \lambda_m \)) is measured. The correct plot of \( \lambda_m \) versus volume of \( \text{AgNO}_3 \) solution is
A compound (X) when treated with \( \text{CuSO}_4 \) solution yields a brown precipitate. On adding hypo solution the precipitate turns white. The compound (X) is
In the following sequence of reactions, what is the end product 'Z'?
Among \( \text{N}_2\text{O} \), \( \text{ClF}_2^- \), \( \text{SO}_2 \) and \( \text{I}_3^+ \), the species having the linear structures are
The major products U and V in the following reaction are

Which one among the following compounds will most readily be dehydrated under acidic condition? 

Identify the major product (G) in the following reaction (Bromination with \( Br_2/FeBr_3 \)). 

Arrange the following compounds in order of their increasing acid strength. 


Which of the following compounds is most reactive in SN$_1$ reaction? 

Increasing order of the nucleophilic substitution of following compounds is

Which of the following hydrocarbons reacts easily with MeMgBr to give methane? 

Kjeldahl's method cannot be used for the estimation of nitrogen in which compound? 

The major product (F) in the following reaction is 

In the following reaction, the major product (H) is

An optically active alkene having molecular formula C$_8$H$_{16$ gives acetone as one of the products on ozonolysis. The structure of the alkene is} 

Compound given below will produce effervescence when mixed with aqueous sodium bicarbonate solution 

Consider the gas phase dissociation, PCl$_5$(g) $\rightleftharpoons$ PCl$_3$(g) + Cl$_2$(g) with equilibrium constant $K_p$ at a particular temperature and pressure $P$. The degree of dissociation ($\alpha$) for PCl$_5$(g) is
An egg takes 4.0 minutes to boil at sea level where boiling point of water is $T_1$ K, whereas it takes 8.0 minutes to boil on a mountain top where boiling point of water is $T_2$ K. The activation energy for the reaction that takes place during boiling of egg is