List of top Chemistry Questions asked in JEE Main

In which of the following pairs, the outer most electronic configuration will be the same ?
In Freundlich adsorption isotherm at moderate pressure, the extent of adsorption $(x/m)$ is directly proportional to $P^x$. The value of x is :
Given below are two statements : Statement I : CeO$_2$ can be used for oxidation of aldehydes and ketones. Statement II : Aqueous solution of EuSO$_4$ is a strong reducing agent. In the light of the above statements, choose the correct answer :
Which of the following equation depicts the oxidizing nature of $H_2O_2$?
Ellingham diagram is a graphical representation of :
The correct statement about B$_2$H$_6$ is :
The solubility of AgCN in a buffer solution of pH=3 is x. The value of x is : [Assume : No cyano complex is formed ; $K_{sp}(\text{AgCN}) = 2.2 \times 10^{-16}$ and $K_a(\text{HCN}) = 6.2 \times 10^{-10}$]
$PCl_5 \rightleftharpoons PCl_3 + Cl_2 K_c = 1.844$
3.0 moles of $PCl_5$ is introduced in a 1 L closed reaction vessel at 380 K. The number of moles of $PCl_5$ at equilibrium is _________ $\times 10^{-3}$. (Round off to the Nearest Integer)

Match List - I with List - II : 

Choose the most appropriate match : 
 

Match List - I with List - II : 

Choose the most appropriate answer from the options given 
 

$CO_2$ gas adsorbs on charcoal following Freundlich adsorption isotherm. For a given amount of charcoal, the mass of $CO_2$ adsorbed becomes 64 times when the pressure of $CO_2$ is doubled. The value of n in the Freundlich isotherm equation is _________ $\times 10^{-2}$. (Round off to the Nearest Integer)
Which one of the following statements is NOT correct ?
The oxidation states of 'P' in $H_4P_2O_7$, $H_4P_2O_5$ and $H_4P_2O_6$, respectively, are :
The parameters of the unit cell of a substance are a = 2.5, b = 3.0, c = 4.0, $\alpha=90^\circ, \beta=120^\circ, \gamma=90^\circ$. The crystal system of the substance is :
Given below are two statements:
Statement I : Rutherford's gold foil experiment cannot explain the line spectrum of hydrogen atom.
Statement II : Bohr's model of hydrogen atom contradicts Heisenberg's uncertainty principle.
In the light of the above statements, choose the most appropriate answer from the options given below:
The statement that is INCORRECT about Ellingham diagram is :
Given below are two statements :
Statement I : Frenkel defects are vacancy as well as interstitial defects.
Statement II : Frenkel defect leads to colour in ionic solids due to presence of F-centres.
Choose the most appropriate answer for the statements from the options given below :

Match items of List - I with those of List - II: 

Choose the most appropriate answer from the options given below : 
 

Match List - I with List - II :

List - I (Metal Ion)List - II (Group in Qualitative analysis)
(a) \( \text{Mn}^{2+} \)(i) Group - III
(b) \( \text{As}^{3+} \)(ii) Group - IIA
(c) \( \text{Cu}^{2+} \)(iii) Group - IV
(d) \( \text{Al}^{3+} \)(iv) Group - IIB

Choose the most appropriate answer from the options given below :

Given below are two statements :
Statement I : According to Bohr's model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in positive charges on the nucleus as there is no strong hold on the electron by the nucleus.
Statement II : According to Bohr's model of an atom, qualitatively the magnitude of velocity of electron increases with decrease in principal quantum number.
In the light of the above statements, choose the most appropriate answer from the options given below :

The major product of the following reaction is : 
(Image shows Benzene reacting with 2-nitropropene in presence of H$_2$SO$_4$) 

For the following sequence of reactions, the correct products are : 

Arrange the following conformational isomers of n-butane in order of their increasing potential energy : 
 

The major product of the following reaction is : 

The spin only magnetic moment of a divalent ion in aqueous solution (atomic number 29) is ________ BM.