List of top Chemistry Questions asked in JEE Main

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: In an Ellingham diagram, the oxidation of carbon to carbon monoxide shows a negative slope with respect to temperature. 
Reason R: CO tends to get decomposed at higher temperature. 
In the light of the above statements, choose the correct answer from the options given below 
The density of the alkali metals is in the order:
Four gases A, B, C and D have critical temperatures 5.3, 33.2, 126.0 and 154.3K respectively. For their adsorption on fixed amount of charcoal, the correct order is :
The bond order and magnetic property of acetylide ion are same as that of
A metal chloride contains 55% by mass of chlorine. 100 mL of vapours gives 0.57 gm of chlorine at STP. Calculate the molecular mass of metal chloride. (Nearest integer)
Which one of the following elements will remain as liquid inside pure boiling water?
Number of isomeric aromatic amines with synthesized by Gabriel Phthalimide synthesis molecular formula C8H11N, which can be is ______. jee main 2023
In an ice crystal, each water molecule is hydrogen bonded to ___ neighbouring molecules
The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is____.
Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather.
The strongest acid from the following is
During the detection of Lead, the Formation of which of the following compounds is not used as a confirmatory test.
IUPAC name of the compound \(K_{3}[Co(C_{2}O_{4})_{3}]\) is
Given below are two statements: One is labelled as "Assertion A" and the other is labelled as "Reason R".
Assertion A: In the complex Ni(CO), and Fe(CO)s, the metals have zero oxidation state.
Reason R: Low oxidation states are found when a complex has ligands capable of π-donor character in addition to the o-bonding.
In the light of the above statements, choose the most appropriate answer from the option given below.
The octahedral diamagnetic low spin complex among the following is
The volume of HCl, containing $73 g L^{−1}$, required to completely neutralise NaOH obtained by reacting $0.69 g$ of metallic sodium with water, is _______ mL.( Nearest Integer)
(Given : molar Masses of Na, Cl, O, H, are 23,35.5,16 and 1 $g mol^{−1}$ respectively)
How many of the following statements are correct:
The compound which does not exist.
The concentration of dissolved Oxygen in water for growth of fish should be more than 𝑋 ppm and Biochemical Oxygen Demand in clean water should be less than 𝑌 ppm. X and Y in ppm are, respectively.
The enthalpy change for the adsorption process and micelle for mation respectively are
Read the following two statements:
Statement I: Potassium dichromate is used in volumetric analysis.
Statement II: \(K_2Cr_2O_7\) is more soluble in water than \(Na_2Cr_2O_7\)
Prolonged heating of ferrous ammonium sulphate is avoided to prevent :
In which of the following options the species changes from paramagnetic to diamagnetic and bond order increases.
On heating, $LiNO_3$ gives how many compounds among the following?
$Li_2O,N_2,O_2,LiNO_2,NO_2 $
The major component of which of the following ore is sulphide based mineral?
Which of the following free radicals helps in depletion of the ozone layer?