List of top Chemistry Questions asked in JEE Main

Which of the following d-block elements has maximum unpaired electron in ground state electronic configuration?

If $K_{sp}$ of ${Ag}_2{CO}_3$ is $8\times {10}^{-12},$ the molar solubility of ${Ag}_2{CO}_3$ in $0.1MAgN{O}_3$ is:

At ${25}^{\circ }C$, the solubility product of $Mg(OH{)}_2$ is $1.0\times {10}^{-11}$. At which $pH$, will $M{g}^{2+}$ ions start precipitating in the form of $Mg(OH{)}_2$ from a solution of $0.001MM{g}^{2+}$ ions ?

Among the following anions, identify the anion which gives pale yellow precipitate with aq. AgNO₃. The precipitate is partially soluble in aq. NH₄OH solution.

Which of the following statement is incorrect-

We have two complexes, [Fe(H₂O)₆]²⁺ and [Cu(H₂O)₆]²⁺ , the magnetic properties respectively are

For a certain reaction, ΔH_r is 400 kJ/mol and ΔS=0.2 kJ/mol K. Above what minimum temperature in Kelvin, the reaction becomes spontaneous.

IUPAC name of complex compound [Pt(Br)₂(PPh₃)₂].

Consider following statements.
S1: IUPAC name is 4-chloro-1,3-dinitrobenzene
S2: IUPAC name is 2-methylaniline

Identify the product formed in the following reaction:

$2$ g of a base whose equivalent weight is $40$ reacts with $3g$ of an acid. The equivalent weight of the acid is:

In both DNA and RNA, heterocyclic base and phosphate ester linkages are at 

The number of isomeric forms that are represented by C7H9N is:

Thermoplastics are:

The products obtained when chlorine gas reacts with cold and dilute aqueous $NaOH$ are:

Nitrogen has no d-orbital in its valence shell and therefore it cannot1) Exhibits the oxidation state of +52) Have covalency greater than 33) Exhibit orbital Hybridization4) Form oxides with oxidation states greater than +5Select the correct answer using codes given below:

Which one of the following species will disproportionate in the following reduction potential diagra

The $\mathrm{pH}$ value of $0.1\mathrm{M}$ solution of anilinium chloride is:$(K_a$ of $C_6{H}_{5}N{H}_3^{+}={10}^{-6})$

The correct order of ionisation enthalpy for Li, Na, Cl, F is:

At ${90}^{\circ }C$, pure water has $\left[H_3{O}^{+}\right]={10}^{-6}m$ on the value of $k_w$ at this temperature is:

Which of the following have undistorted octahedral structures?
1. $S{F}_6$
2. $P{F}_6^{-}$
3. $Si{F}_6^{2-}$
4. $Xe{F}_6$
Select the correct answer using the codes given below:

Which of the following will be oxidized by \(HIO_4\)?

Two particles A and B are in motion and the wavelength of A is 5 × 10^-8 m. The wavelength of B, so that its momentum is double that of A, will be: