List of top Questions asked in JEE Main- 2023

Match List-I with List-II

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Two charges each of magnitude 0.01 C and separated by a distance of 0.4 mm constitute an electric dipole. If the dipole is placed in an uniform electric field of 10 dyne/C making 30º angle with \(\overrightarrow E\), the magnitude of torque acting on dipole is:

The energy of an electron in the first Bohr orbit of hydrogen atom is \(-2.18×10^{-18}J\). Its energy in the third Bohr orbit is ____.

Which of the following statements are not correct?
A. The electron gain enthalpy of F is more negative than that of Cl.
B. Ionization enthalpy decreases in a group of periodic table.
C. The electronegativity of an atom depends upon the atoms bonded to it.
D. Al₂O₃ and NO are examples of amphoteric oxides.
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Given below are two statements:
Statement I: Permutit process is more efficient compared to the synthetic resin method for the softening of water.
Statement II: Synthetic resin method results in the formation of soluble sodium salts.
In the light of the above statements, choose the most appropriate answer from the options given below:

Be(OH)₂ reacts with Sr(OH)₂ to yield an ionic salt. Choose the incorrect option related to this reaction from the following:

ClF5 at room temperature is:

The mismatched combinations are
A. Chlorophyll - Co 
B. Water hardness - EDTA 
C. Photography - [Ag(CN)₂]- 
D. Wilkinson catalyst - [(Ph₃P)₃ RhCl]  
E. Chelating ligand-D- Penicillamine

Among the following compounds, the one which shows highest dipole moment is

In the following reaction 'X' is
CH₃ (CH₂)₄ CH₃ \(\frac{A n h y . A l C l _3 }{HCL\triangle}X\) major product

2-Methyl propyl bromide reacts with C₂H₅O^- and gives 'A' whereas on reaction with C₂H₅OH it gives 'B'. The mechanism followed in these reactions and the products 'A' and 'B' respectively are

In the above reaction. Left hand side and right hand side rings are named as 'A' and 'B' respectively. They undergo ring expansion. The correct statement for this process is:

In the reaction given below ‘A’ is

In the reaction given below ‘B’ is:

Match the following

Column-A	Column-B
Nylon 6	Natural Rubber
Vulcanized Rubber	Cross Linked
cis-1,4-polyisoprene	Caprolactam
Polychloroprene	Neoprene.

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D-(+)- Glyceraldehyde  
The two products formed in above reaction are

If the system of equations  
x + y + az = b  
2x + 5y + 2z = 6  
x + 2y + 3z = 3  
Has infinitely many solutions, then 2a + 3b is equal to

if \(2x^y+3y^x=20\) then \(\frac{dy}{dx}\) at (2,2) is equal to:

The straight lines l₁ and l₂ pass through the origin and trisect the line segment of the line L: 9x + 5y = 45 between the axes. If m₁ and m₂ are the slopes of the lines l₁ and l_2, then the point of intersection of the line y = (m₁ + m₂)x with L lies on

If the equation of the plane passing through the line of intersection of the planes 2x – y + z = 3, 4x– 3y +5z + 9 = 0 and parallel to the line  \(\frac{x+1}{−2} =\frac{ y+3}{4}= \frac{z−2}{5}\) is ax by+cz+6=0. then a + b + c is equal to 

\(5\^{i}+5\hat{j}+2λ\hat{k},\hat{i}+2\hat{j}+3\hat{k},-2\hat{i}+λ\hat{j}+4\hat{k}\) and \(-\hat{i}+5\hat{j}+6\hat{k}.\) Let the set S = {λ∈ \(\mathbb{R}\) : The points A, B, C and D are coplanar}. Then \(\displaystyle\sum_{λ∈S}^{}(λ+2)^2\) is equal to

The difference between electron gain enthalpies will be maximum between

The standard electrode potential of M^+/M in aqueous solution does not depend on

Compound P is neutral. Q gives effervescence with NaHCO₃ while R reacts with Hinsbergs reagent to give solid soluble in NaOH. Compound P is

Match List I with List II

	List I  Element detected		List II  Reagent used/ Product formed
A	Nitrogen	I	Na2[Fe(CN)5 NO]
B	Sulphur	II	AgNO3
C	Phosphorous	III	Fe4[Fe(CN)6]3
D	Halogen	IV	(NH4)2 MoO4

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