List of top Chemistry Questions asked in JEE Main

List-I (Compound)	List-II (Shape)
(A) \(BrF_5\)	(I) bent
(B) \([CrF_6]^{3–}\)	(II) square pyramidal
(C) \(O_3\)	(III) trigonal bipyramidal
(D) \(PCI_5\)	(IV) octahedral

Choose the correct answer from the options given below :

Among the following structures, which will show the most stable enamine formation?
(Where Me is –CH₃)

The reaction of

with bromine and \(KOH\) gives \(RNH_2\) as the end product. Which one of the following is the intermediate product formed in this reaction?

Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?

Among the following, basic oxide is:

Match List-I with List-II :

List-I	List-II
(A) Negatively charged sol	(I) Fe₂O₃.xH_2O
(B) Macromolecular colloid	(II) CdS sol
(C) Positively charged sol	(III) Starch
(D) Cheese	(IV) a gel

Choose the correct answer from the options given below:

In the following reaction,
the % yield for reaction I is 60% and that of reaction II is 50%. The overall yield of the complete reaction is _______%. [Nearest integer].

The amount of charge in F (Faraday) required to obtain one mole of iron from \(Fe_3O_4\) is ______ . (Nearest integer)

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

Vulcanization of rubber is carried out by heating a mixture of

An antiseptic Dettol is a mixture of two compounds ‘A’ and ‘B’ where A has 6π electrons and B has 2π electrons. What is ‘B’?

The intermediate X, in the reaction is:

Which of the following reagents/reactions will convert ‘A’ to ‘B’?

Arrange the following coordination compounds in the increasing order of magnetic moments. (Atomic numbers: \(Mn = 25; Fe = 26\))
(1) \([FeF_6]^{3–}\)
(2) \([Fe(CN)_6]^{3–}\)
(3) \([MnCl_6]^{3–}\)(high spin)
(4) \([Mn(CN)_6]^{3–}\)

The spin-only magnetic moment value of the compound with strongest oxidizing ability among MnF₄, MnF₃and MnF₂ is____ B.M. [nearest integer]

17.0 g of NH₃ completely vapourises at – 33.42°C and 1 bar pressure and the enthalpy change in the process is 23.4 kJ mol^–1. The enthalpy change for the vapourisation of 85 g of NH₃under the same conditions is ____ kJ.

The major product of the following reaction contains ______ bromine atom(s).

The number of terminal oxygen atoms present in the product B obtained from the following reaction is ______.
FeCr₂O₄ + Na₂CO₃ + O₂ → A + Fe₂O₃ + CO₂
A + H⁺ → B + H₂O + Na⁺

s-block element which cannot be qualitatively confirmed by the flame test is

The number of non-ionisable protons present in the product B obtained from the following reactions is__.
C₂H₅OH+PCl₃→C₂H₅Cl+A
A+PCl₃→B

Amongst the following, the major product of the given chemical reaction is

Amongst the following, the major product of

The conductivity of a solution of complex with formula CoCl₃(NH₃)₄ corresponds to 1 : 1 electrolyte, then the primary valency of central metal ion is ______.

A radioactive element has a half life of 200 days. The percentage of original activity remaining after 83 days is ________. (Nearest integer) (Given : antilog 0.125 = 1.333, antilog 0.693 = 4.93)

Compound A contains 8.7% Hydrogen, 74% Carbon and 17.3% Nitrogen. The molecular formula of the compound is,
Given : Atomic masses of C, H and N are 12, 1 and 14 amu, respectively.
The molar mass of the compound A is 162g mol^–1.