List of top Chemistry Questions asked in JEE Main

In 3, 3-dimethylhex-1-en-4-yne, the number of sp, sp² and sp³ carbon atoms, respectively are:

Nature of compounds TeO₂ and TeH₂ is___________ and ______________respectively.

For the reaction, $H_2(g) + I_2(g) \rightleftharpoons 2HI(g)$

Attainment of equilibrium is predicted correctly by:

Total number of nucleophiles from the following is: $NH_3$, $PhSH$, $(H_3C_2S)_2$, $H_2C=CH_2$, $OH^-$, $H_3O^+$, $(CH_3)_2CO$, $NCH_3$

1.24 g of $ {AX}_2 $ (molar mass 124 g mol$^{-1}$) is dissolved in 1 kg of water to form a solution with boiling point of 100.105$^\circ$C, while 2.54 g of $ {AY}_2 $ (molar mass 250 g mol$^{-1}$) in 2 kg of water constitutes a solution with a boiling point of 100.026$^\circ$C. $ K_{b(H_2O)} = 0.52 \, \text{K kg mol}^{-1} $. Which of the following is correct?

The heat of formation of $ \text{SO}_2(g) $ is given by: $$ S(g) + \frac{3}{2} O_2(g) \rightarrow SO_3(g) + 2x \, \text{kcal} $$ $$ SO_2(g) + \frac{1}{2} O_2(g) \rightarrow SO_3(g) + y \, \text{kcal} $$

For the reaction, $$ H_2(g) + I_2(g) \rightleftharpoons 2HI(g) $$ Attainment of equilibrium is predicted correctly by:

Consider the given plots of vapor pressure (VP) vs temperature (T/K). Which amongst the following options is the correct graphical representation showing $ \Delta T_f $ depression in the freezing point of solvent in a solution?

Which of the following has $\text{sp}^3\text{d}^2$ hybridisation?

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.

Match List-I with List-II.

Choose the correct answer from the options given below :

Atomic number of element with lowest first ionisation enthalpy is

0.01 mole of an organic compound (X) containing 10% hydrogen, on complete combustion, produced 0.9 g H₂O. Molar mass of (X) is ___________g mol$^{-1}$.

The effect of temperature on the spontaneity of reactions are represented as: Which of the following is correct?

The correct order of basic strength of the following molecules is:
(A) $\text{C}_6\text{H}_4\text{NH}_2\text{O}$
(B) $\text{C}_6\text{H}_4\text{NH}_2\text{MeO}$
(C) $\text{C}_6\text{H}_4\text{NH}_2\text{NO}_2$
(D) $\text{C}_6\text{H}_4\text{NH}_2\text{CH}_3$

Consider the following oxides:
V_2O_5, Cr_2O_3, Mn_2O_7, V_2O_3, VO_2
A number of oxides which are acidic is $ x $.
Consider the following complex compound:
[Co(NH_2CH_2CH_2NH_2)_3](SO_4)_3
The primary valency of the complex is $ y $.
What is the value of $ x + y $ is?

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} $.

Maximum IE and minimum IE of group 13 elements are:

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.

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: