List of top Questions asked in JEE Main

Choose the correct answer :

1. Production of iron in blast furnace follows the following equation

Fe3O4(s)+4CO(g)→3Fe(I)+4CO22(g)

when 4.640 kg of Fe₃O₄ and 2.520 kg of CO are allowed to react then the amount of iron (in g) produced is

[Given : Molar Atomic mass (g mol^–1) : Fe = 56

Molar Atomic mass (g mol^–1) : O = 16

Molar Atomic mass (g mol^–1) : C = 12]

1. The electronic configuration of Cr is [Ar] 3d⁵4s¹.
2. The magnetic quantum number may have a negative value.
3. In the ground state of an atom, the orbitals are filled in order of their increasing energies.
4. The total number of nodes are given by n – 2.

Arrange the following in the decreasing order of their covalent character :

(A) LiCl

(B) NaCl

(C) KCl

(D) CsCl

Choose the most appropriate answer from the options given below :

Match List-I with List-II.

Choose the most appropriate answer from the options given below:

Match List-I with List-II.

Choose the most appropriate answer from the options given below:

In the given conversion the compound A is:

Given below are two statements:

Statement I: The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.

Statement II: Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.

Choose the most appropriate option

Consider the above reactions, the product A and product B, respectively are