List of top Chemistry Questions asked in JEE Main

How many of the following statements are correct:

Select the correct option:
$2CO (g) + O_2 (g) → 2CO_2 (g) ; ΔH = -x KJ/mol$
$C (graphite) + O_2(g) → CO_2 (g) ; AH = -y KJ/mol$
Then AH for, $C(graphite) + \frac{1}{2} O_2 (g) → CO (g):$

For conversion of compound $A→B$, the rate constant of the reaction was found to be $4.6×10^{−5} L mol^{−1} s^{−1}$. The order of the reaction is _____ .

Ion having highest hydration enthalpy among the given alkaline earth metal ions is:

In which form does $BeCl_{2}$ exist in the solid state, vapor state and high temperature?
(1) Polymeric, Dimeric, Monomeric
(2) Dimeric, Polymeric, Monomeric
(3) Monomeric, Dimeric, Polymeric
(4) Polymeric, Monomeric, Dimeric

The product , which is not obtained during the electrolysis of brine solution is ____ .

Consider the following reaction that goes from A to B in three steps as shown

below Choose the correct option:

The volume of 0.02 M aqueous HBr required to neutralize 10.0 mL of 0.01 M aqueous Ba(OH)₂ is ____ . (Assume complete neutralization)

For a metal ion, the calculated magnetic moment is 4.90 BM. This metal ion has ______ number of unpaired electrons.

During bleeding from cut $FeCl_3$ is used to stop bleeding as

The solubility product of BaSO₄ is $1 \times 10^{-10}$ at 298 K. The solubility of BaSO₄ in 0.1 M K₂SO₄(aq) is $x \times 10^{-9}$ g L⁻¹. Calculate the value of $x$.

Compounds of Xenon have one electron pair on central atom :

Out of the following which has maximum CFSE? ( consider with sign)

The ratio of silica to alumina in cement is:

Identify the correct statement about the compound GaAIC₁₄

An unknown organic compound is heated with fuming $HNO_3$. The reaction mixture is treated with aq $BaCl_2$ solution which gives white precipitate. Identify the unknown organic compound.

Which of the following acts as a stabilizer in the decomposition of H₂O₂?

Consider the following reaction sequence: $[CaCl_2 + Na_2CO_3 → X+Y] → Z$

If the formula of borax is $Na_2B_4Ox(OH)y.zH_2O$ , Find the value of x + y + z.

How many of the following have five radial nodes ?
5s, 6s, 7s, 6p and 4p

In good quality cement ratio of lime total oxides of Si(SiO$_2$), Aluminium(Al$_2$O$_3$) and Iron(Fe$_2$O$_3$) should be as close as possible to _____ .

Total spin only magnetic moment of the ion [Mn(SCN)₆]^x– is 5.92 B.M. Find out the value of x.

Which of the following is not ambidentate ligand

Which of the following can be represented as a meridional isomer?

Statement-1: Methyl orange is a weak acid
Statement-2: Benzenoid form of methyl orange is deeply coloured than quinonoid form
Check out which of the above statement is true?