List of top Chemistry Questions asked in JEE Main

Amongst FeCl₃.3H₂O, K₃[Fe(CN)₆)] and [Co(NH₃)₆]Cl₃, the spin-only magnetic moment value of the inner-orbital complex that absorbs light at shortest wavelength is_______B.M. [nearest integer]

Consider the following reactions.

$PCl_3+H_2→A+HCL$

$A+H_2o→B+HCL$

The number of ionisable protons present in the product B is

The neutralization occurs when 10 mL of 0.1M acid ‘A’ is allowed to react with 30 mL of 0.05 M base M(OH)₂. The basicity of the acid ‘A’ is____[M is a metal]

Match List-I with List-II.

List-I	List-II
(A) N₂(g) + 3H₂(g) → 2NH₃(g)	(I) Cu
(B) CO(g) + 3H₂(g) → CH₄(g) + H₂O(g)	(II) Cu/ZnO – Cr₂O₃
(C) CO(g) + H₂(g) → HCHO(g)	(III) Fe_xO_y + K₂O + Al₂O₃
(D) CO(g) + 2H₂(g) → CH₃OH(g)	(IV) Ni

Choose the correct answer from the options given below :

Given below are two statements : Statement I : On heating with $KHSO _4$, glycerol is dehydrated and acrolein is formed
Statement II : Acrolein has fruity odour and can be used to test glycerol's presence Choose the correct option

In the given reaction,

(where Et is –C₂H₅)
The number of chiral carbon(s) in product A is ______.

Hex-4-ene-2-ol on treatment with PCC gives ‘A’ on reaction with sodium hypoiodite gives ‘B’, which on further heating with soda lime gives ‘C’. The compound ‘C’ is

The conversion of $propan-1-ol$ to $n-butylamine$ involves the sequential addition of reagents. The correct sequential order of reagents is

Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?

The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

Consider the above reaction sequence and identify the product B.

Which will have the highest enol content?

During the denaturation of proteins, which of these structures will remain intact ?

The structure shown below is of which well-known drug molecule?

Which one of the following is a water soluble vitamin, that is not excreted easily?

Sugar moiety in DNA and RNA molecules, respectively are

Amongst BeF₂, BF₃, H₂O, NH₃, CCl₄ and HCl, the number of molecules with non-zero net dipole moment is ______.

The formulas of A and B for the following reaction sequence are

The number of molecules(s) or ions(s) from the following having non-planar structure is ____.
$NO^-_3, H_2O_2, BF_3, PCl_3, XeF_4, SF_4, XeO_3, PH^+_4, SO3,[Al(OH)_4]^-$

In the above reaction, 5 g of toluene is converted into benzaldehyde with 92% yield. The amount of benzaldehyde produced is______ × 10^–2 g. (Nearest integer).

Which of the given reactions is not an example of disproportionation reaction?

The dark purple colour of $KMnO _4$ disappears in the titration with oxalic acid in acidic medium. The overall change in the oxidation number of manganese in the reaction is :

Choose the correct option for the following reactions

Among the following which is the strongest oxidizing agent?

Which one of the following is an example of disproportionation reaction?