List of top Chemistry Questions asked in JEE Main

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:

In which of the following reactions, major product is matched correctly?

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

Match List-I with List-II and select 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.

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:

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.

Consider the last electron of an element having atomic number $9$ and choose the correct option.

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:

Given below are two statements: - Assertion (A): Sodium on reaction with alcohols liberates $ \text{H}_2 $ gas. - Reason (R): Alcohols are acidic in nature. In the light of the above statements, choose the correct answer from the options below:

Transition metal belonging to the 3d series having the lowest enthalpy of atomization in its most stable oxidation state forms oxide $ \text{MO} $. Nature of the oxide is:

A compound having molecular formula $ \text{MX}_3 $ has van't Hoff factor of 2. What is the degree of dissociation?

One mole of an ideal gas expands from 10 dm$^3$ to 20 dm$^3$ through an isothermal reversible process. Find $ \Delta U $, $ q $, and $ w $.

Incorrect order of atomic radius is?

In the following, the number of paramagnetic molecules are: O$_2$, N$_2$, F$_2$, B$_2$, Cl$_2$.