List of top Chemistry Questions asked in JEE Main

From the given information, calculate enthalpy of formation of 2 moles of $C_6H_6$(l) at 25°C. Given: $CH(C_6H_6$(l)) = –3264.6 kJ/mol $CH(C(s))$ = –393.5 kJ/mol $fH(H_2O(l))$ = –285.83 kJ/mol

Number of π bonds present in product B is:

In an atom, how many electrons can have
(i) n = 4 (ii) m1 =1 (iii) ms = ½

How many of the following have zero dipole moment $H_2S, CH_4, NH_3, BF_3, SO_2, NF_3$

Consider the following reaction: The product is

Find out value of $C_p/C_y$ for an ideal gas undergoing reversible adiabatic process for which $P ∝ T^3$ is given

Which of the following is true regarding coagulation of egg:

Find out E cell of the given cell M | M²⁺ | | x^2-|x.|
Eº_M²⁺_{I M} = 0.34 V
E°_x|x^2- = 0.46 V

The molarity of NaCl solution is 3 M. Calculate the morality of the solution. (Given density of the solution = 1.25 g/mL)

Product B is:

For a certain reaction, ΔH_r is 400 kJ/mol and ΔS=0.2 kJ/mol K. Above what minimum temperature in Kelvin, the reaction becomes spontaneous.

Find out the shortest wavelength of paschen series for H- atom

Which of the following d-block elements has maximum unpaired electron in ground state electronic configuration?

Match the column.

Column-I (Compounds)		Column-II (Configurations)
A.	TiCl4	(1)	e3t23
B.	FeO42-	(2)	e2t20
C.	FeCl42-	(3)	e2t23
D.	MnCl42-	(4)	e0t20

Which of the following statement is incorrect-

Among the following anions, identify the anion which gives pale yellow precipitate with aq. AgNO₃. The precipitate is partially soluble in aq. NH₄OH solution.

IUPAC name of complex compound [Pt(Br)₂(PPh₃)₂].

Identify the product formed in the following reaction:

Consider following statements.
S1: IUPAC name is 4-chloro-1,3-dinitrobenzene
S2: IUPAC name is 2-methylaniline

We have two complexes, [Fe(H₂O)₆]²⁺ and [Cu(H₂O)₆]²⁺ , the magnetic properties respectively are

Find among the spin only magnetic moment (nearest integer) of M in MO₄^2-, M being the atom having least atomic radii among Sc, Ti, V, Cr, Mn, Zn.

A solution contains 100 g water and 10 g of AB₂, The boiling of the solution was found to be 100.52% The degree of dissociation of AB₂ is: 
[MW of AB = 200 gm/mol ; K_b = 0.52 Kkg/mol

Statement-I : Stability of +1 oxidation state increases as Ga< In < Tl
Statement-II : Stability of +1 oxidation state increases down the group due to inert pair effect.

CoCl₃.xNH₃ on reaction with excess AgNO₃(aq.) gives two moles of AgCl as precipitate.
Summation of oxidation state of Co in CoCl₃.xNH₃ and x is:

X ⇌ Y;K₁ = 1
Y ⇌ Z; K₂ = 2
Z ⇌ W; K₃ = 4
Find K_eq for X ⇌ W