List of top Chemistry Questions asked in JEE Main

Match List-I with List-II and select the correct option.

On combustion of 0.21 g of an organic compound containing C, H, and O, it gave 0.127 g of H$_2$O and 0.307 g of CO$_2$. The percentage of H and O in the given organic compound respectively are:

Match List-I with List-II and select the correct option:

Match list-I with list-II and choose the correct option.

The correct IUPAC name of the product is:

For a first-order reaction, the ratio of time required is $ \frac{t_1}{t_2} $, if $ t_1 $ is the time consumed when reactant reaches $ \frac{1}{4} $ of initial concentration and $ t_2 $ is the time when it reaches $ \frac{1}{8} $ of initial concentration.

The correct sequence of reagents to be added for the following conversion is:

Correct decreasing order of spin-only magnetic moment values is:

The correct IUPAC name of the compound is:

Consider the following statements:
Statement-I: H$_2$Se is more acidic than H$_2$Te.
Statement-II: H$_2$Se has higher bond dissociation enthalpy than H$_2$Te.
In light of the above statements, choose the correct option:
Atomic number of element with lowest first ionisation enthalpy is:
Consider the following sequence of reactions given below: $ \text{Br-C}_6\text{H}_5 \xrightarrow{\text{alc. KOH}} \text{C}_6\text{H}_4 \xrightarrow{\text{NaNH}_2} \text{C}_6\text{H}_3 \xrightarrow{Hg^{2+}} \text{C}_6\text{H}_2 \xrightarrow{Zn-Hg} P $ The product P is:
Which of the following has $ sp^3d^2 $ hybridization?
Consider the last electron of element having atomic number 9 and choose the correct option.
Consider the following statements:
Statement I: $H_2Se$ is more acidic than $H_2Fe$
Statement II: $H_2Se$ has higher bond dissociation enthalpy
In light of the above statements, choose the correct option.
Atomic number of element with lowest first ionisation enthalpy is
Consider the last electron of an element having atomic number $9$ and choose the correct option.
Which of the following is the correct order of acidic character of oxides of vanadium?
Which of the following is the correct hybridization of \( \text{XeF}_4 \)?
If \( x |x - 3| + 3 |x - 2| + 1 = 0 \), then the number of real solutions is.

Consider the following graph between Rate Constant (K) and \( \frac{1}{T} \): Based on the graph, determine the correct order of activation energies \( E_{a1}, E_{a2}, \) and \( E_{a3} \).

Statement-1: Alcohol is prepared from alkyl halide in the presence of aqueous KOH by elimination.
Statement-2: Alkenes are prepared from alkyl halide with alcoholic KOH by $\beta$-elimination.
Which of the following options is correct? 1. Statement-1 and Statement-2 are correct.
2. Statement-1 and Statement-2 are incorrect.
3. Statement-1 is true and Statement-2 is false.
4. Statement-1 is false and Statement-2 is true.
Maximum IE and minimum IE of group 13 elements are:
Total number of electrons in chromium (Z = 24) for which the value of azimuthal quantum number (l) is 1 and 2.
Maximum IE and minimum IE of group 13 elements are: