List of top Chemistry Questions asked in JEE Main

In chromyl chloride, the number of d-electrons present on chromium is same as in (Given at no. of Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)

The correct order of spin only magnetic moments for the following complex ions is

Choose the halogen which is most reactive towards SN1 reaction in the given compounds (A, B, C & D)

The major product formed in the following reaction is

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.  
Assertion A: Butan -1- ol has higher boiling point than ethoxyethane.  
Reason R: Extensive hydrogen bonding leads to stronger association of molecules.  
In the light of the above statements, choose the correct answer from the options given below: 

Match List-I with List-II :

	List-I (Species)		List-II (Maximum allowed concentration in ppm in drinking water)
A	F-	I	< 50 ppm
B	\(SO^{2-}_4\)	II	< 5 ppm
C	\(NO^-_3\)	III	< 2 ppm
D	Zn	IV	< 500 ppm

Choose the correct answer from the options given below :

The reaction \(\frac{ 1}{2}\)H₂(g) + AgCl(s) → H⁺(aq) + Cl^-(aq) + Ag(s) occurs in which of the given galvanic cell.

Which of the following complex is octahedral, diamagnetic and the most stable?

Which of the following represent the Freundlich adsorption isotherms?




Choose the correct answer from the options given below: 

\(2 I O^ − _3 + x I ^− + 12 H ^+ ⟶ 6 I_ 2 + 6 H _2 O\) What is the value of x?

What is the purpose of adding gypsum to cement? 

Match List I with List II:

List I - (Monomer)	List II - (Polymer)
(A) Tetrafluoroethene	(I) Orlon
(B) Acrylonitrile	(II) Natural rubber
(C) Caprolactam	(III) Teflon
(D) Isoprene	(IV) Nylon-6

Choose the correct answer from the options given below:

Which one among the following metals is the weakest reducing agent?

The number of sp² hybridized carbon atoms in the following peptide is Ala – Phe – Gly – Ala – Phe - Ley

pH of 1 litre of HCL solution is 1. How much water (in litres) is added to make pH=2?

Correct order of spin only magnetic moment of the following complex ions is:
(Given At.no. Fe: 26, Co:27)

The complex with highest magnitude of crystal field splitting energy (Δ0) is

Number of ambidentate ligands in given complex [M_(en)(SCN)₄]:

In the following reactions, the total number of oxygen atoms in X and Y is _______
Na₂O + H₂O → 2X
Cl₂O₇ + H₂O → 2Y

\(Xef_4 + Sbf_5 → [XeFm]^{+n} [SbFp]^{q-}\). Find the value of m + n + p+ qũ?

Arrange the following gases in increasing order of van der Waals constant 'a'
A. Ar
B. CH4
C. H₂O
D. C6H6
Choose the correct option from the following.

For given cell, at T K
Pt | H₂(g) | H⁺ || Fe³⁺ ; Fe²⁺ | Pt
   ( 1 bar ) ( 1 M )
E_cell = .712 V
E^°_cell = .770 V
if \(\frac{[Fe^{2+}]}{[Fe^{3+}]}\) is t \((\frac{2.303\ RT}{F}=.058)\)
then find \((\frac{t}{5})\)

600 mL of 0.04 M HCl is mixed with 400 mL of 0.02 M H₂SO₄. Find out the pH of resulting solution (Nearest integer).

Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given v = frequency of X-ray emitted
Z = atomic number

For the 1st order reactions, the ratio of t_50% to t_87.5% will be: