List of top Questions asked in JEE Main- 2024

The reaction at cathode in the cells commonly used in clocks involves.

What is the structure of C ?

The correct order of first ionization enthalpy values of the following elements is :
(A) O (B) N (C) Be (D) F (E) B
Choose the correct answer from the options given below :

Iron (III) catalyses the reaction between iodide and persulphate ions, in which
A. \(\text{Fe}^{3+}\) oxidises the iodide ion
B. \(\text{Fe}^{3+}\) oxidises the persulphate ion
C. \(\text{Fe}^{2+}\) reduces the iodide ion
D. \(\text{Fe}^{2+}\) reduces the persulphate ion
Choose the most appropriate answer from the options given below:

Which among the following halide/s will not show S$_N$1 reaction:

Choose the most appropriate answer from the options given below:

The major product(P) in the following reaction is

Which one the following compounds will readily react with dilute NaOH?

Given below are two statements:
Statement (I): A \(\pi\) bonding MO has lower electron density above and below the inter-nuclear axis.
Statement (II): The \(\pi^*\) antibonding MO has a node between the nuclei.
In the light of the above statements, choose the most appropriate answer from the options given below:

Which of the following compounds show colour due to d-d transition?

A first row transition metal in its +2 oxidation state has a spin-only magnetic moment value of 3.86 BM. The atomic number of the metal is

Identify the product A in the following reaction.

The correct statement about Zn, Cd, Hg are

Lassaigne's test is used for detection of :

Alkaline KMnO4 Oxidised iodide to a particular product (A). Determine the oxidation state of iodine in the compound (A).

Match List-I with List-II.

List-I (Elements)	List-II (Properties in their respective groups)
(A) Cl,S	(I) Elements with highest electronegativity
(B) Ge, As	(II) Elements with largest atomic size
(C) Fr, Ra	(III) Elements which show properties of both metals and non metal
(D) F, O	(IV) Elements with highest negative electron gain enthalpy

Choose the correct answer from the options given below:

The correct set of four quantum numbers for the valence electron of rubidium atom (Z = 37) is:

Match List-I with the List-II

List-I Tetrahedral Complex	List-II Electronic configuration
(A) TiCl4	(I) e2, t20
(B) [FeO4]2-	(II) e4, t23
(C) [FeCl4]-	(III) e0, t22
(D) [CoCl4]2-	(IV) e2, t23

Choose the correct answer from the options given below:

Find out the final product C

What is the order of reducing character for \(AsH_3, NH_3, PH_3\) (group \(15\) hydrides)?

Which of the following sets of elements can be detected by Lassaigne's Test ?

One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes ?

Identify the product (P) in the following reaction:

In Kjeldahl’s method for estimation of nitrogen, CuSO\(_4\) acts as: