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JEE Main
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Chemistry
List of top Chemistry Questions asked in JEE Main
Total number of species from the following which can undergo disproportionation reaction _______.
$\text{H}_2\text{O}_2, \text{ClO}_3^-, \text{P}_4, \text{Cl}_2, \text{Ag}, \text{Cu}^{+1}, \text{F}_2, \text{NO}_2, \text{K}^+$
JEE Main - 2024
JEE Main
Chemistry
Redox reactions
Consider the following reactions
The number of protons that do not involve in hydrogen bonding in the product B is______.
JEE Main - 2024
JEE Main
Chemistry
Hydrogen Bonding
A transition metal 'M' among Sc, Ti, V , Cr, Mn and Fe has the highest second ionisation enthalpy. The spin only magnetic moment value of M+
ion is ______ BM (Near integer) (Given atomic number Sc : 21, Ti : 22, V : 23, Cr : 24, Mn : 25, Fe : 26)
JEE Main - 2024
JEE Main
Chemistry
Enthalpy change
One of the commonly used electrode is calomel electrode. Under which of the following categories calomel electrode comes ?
JEE Main - 2024
JEE Main
Chemistry
coordination compounds
The major product(P) in the following reaction is
JEE Main - 2024
JEE Main
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
If an iron (III) complex with the formula \[\left[ \text{Fe}(\text{NH}_3)_x (\text{CN})_y \right]^-\]has no electron in its \( e_g \) orbital, then the value of \( x + y \) is:
JEE Main - 2024
JEE Main
Chemistry
coordination compounds
Given below are two statements:
Statement (I) : Aminobenzene and aniline are same organic compounds.
Statement (II) : Aminobenzene and aniline are different organic compounds.
In the light of the above statements, choose the most appropriate answer from the options given below:
JEE Main - 2024
JEE Main
Chemistry
Nomenclature Of Organic Compounds
From the given list, the number of compounds with +4 oxidation state of Sulphur_____.
\(SO_3, H_2SO_3, SOCl_2, SF_4, BaSO_4, H_2S_2O_7\)
.
JEE Main - 2024
JEE Main
Chemistry
Group 16 Elements
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with AgCN form isocyanide as the main product.
Reason (R) : KCN and AgCN both are highly ionic compounds. In the light of the above statement
Choose the most appropriate answer from the options given below:
JEE Main - 2024
JEE Main
Chemistry
Organic Chemistry- Some Basic Principles and Techniques
Given below are two statements:
Statement (I) : The NH
2
group in Aniline is ortho and para directing and a powerful activating group.
Statement (II) : Aniline does not undergo Friedel- Craft’s reaction (alkylation and acylation). In the light of the above statements
Choose the most appropriate answer from the options given below :
JEE Main - 2024
JEE Main
Chemistry
Aromaticity & chemistry of aromatic compounds
Match List – I with List –II.
Choose the correct answer from options given below:
JEE Main - 2024
JEE Main
Chemistry
Thermodynamics
In case of isoelectronic species the size of F
–
, Ne and Na
+
is affected by:
JEE Main - 2024
JEE Main
Chemistry
Periodic properties
Given below are two statements:
Statement (I):
A solution of \([Ni(H_2O)_6]^{2+}\) is green in color.
Statement (II):
A solution of \([Ni(CN)_4]^{2-}\) is colorless.
In the light of the above statements, choose the most appropriate answer from the options given below.
JEE Main - 2024
JEE Main
Chemistry
Coordination chemistry
Given below are two statements :
Statement (I) : Potassium hydrogen phthalate is a primary standard for standardisation of sodium hydroxide solution.
Statement (II) : In this titration phenolphthalein can be used as indicator.
In the light of the above statements, choose the most appropriate answer from the options given below:
JEE Main - 2024
JEE Main
Chemistry
Acid-base titrations
For a reaction taking place in three steps at the same temperature, the overall rate constant \( K = \frac{K_1 K_2}{K_3} \). If \( E_{a1} \), \( E_{a2} \), and \( E_{a3} \) are 40, 50, and 60 kJ/mol respectively, the overall \( E_a \) is ____ kJ/mol.
JEE Main - 2024
JEE Main
Chemistry
Chemical Kinetics
If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is:
JEE Main - 2024
JEE Main
Chemistry
Biomolecules
Which of the following compound will most easily be attacked by an electrophile?
JEE Main - 2024
JEE Main
Chemistry
Aromaticity & chemistry of aromatic compounds
Which of the following reactions are disproportionation reactions?
\(\text{(A) } \text{Cu}^+ \rightarrow \text{Cu}^{2+} + \text{Cu}\)
\(\text{(B) } 3\text{MnO}_4^{2-} + 4\text{H}^+ \rightarrow 2\text{MnO}_4^- + \text{MnO}_2 + 2\text{H}_2\text{O}\)
\(\text{(C) } 2\text{KMnO}_4 \rightarrow \text{K}_2\text{MnO}_4 + \text{MnO}_2 + \text{O}_2\)
\(\text{(D) } 2\text{MnO}_4^- + 3\text{Mn}^{2+} + 2\text{H}_2\text{O} \rightarrow 5\text{MnO}_2 + 4\text{H}^+\)
Choose the correct answer from the options given below.
JEE Main - 2024
JEE Main
Chemistry
Chemical Reactions
The number of species from the following which are paramagnetic and with bond order equal to one is ___.
Species:
H
2
, He
2
+
, O
2
-
, N
2
, O
2
2-
, F
2
, Ne
2
+
, B
2
JEE Main - 2024
JEE Main
Chemistry
Chemical bonding and molecular structure
In acidic medium, \( K_2Cr_2O_7 \) shows oxidizing action as represented in the half-reaction:
\(Cr_2O_7^{2-} + XH^+ + Ye^- \rightarrow 2A + ZH_2O\)
\( X \), \( Y \), \( Z \), and \( A \) are respectively:
JEE Main - 2024
JEE Main
Chemistry
Redox reactions
Arrange the bonds in order of increasing ionic character in the molecules. LiF, K\(_2\)O, N\(_2\), SO\(_2\), and ClF\(_3\).
JEE Main - 2024
JEE Main
Chemistry
Chemical bonding and molecular structure
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : PH
3
has lower boiling point than NH
3
.
Reason (R) : In liquid state NH
3
molecules are associated through vander waal’s forces, but PH
3
molecules are associated through hydrogen bonding.
In the light of the above statements.
Choose the most appropriate answer from the options given below:
JEE Main - 2024
JEE Main
Chemistry
Hydrogen Bonding
The total number of molecular orbitals formed from 2s and 2p atomic orbitals of a diatomic molecule is _________.
JEE Main - 2024
JEE Main
Chemistry
Molecular Orbital Theory
Which of the following complex is homoleptic?
JEE Main - 2024
JEE Main
Chemistry
Coordination chemistry
In Kjeldahl’s method for estimation of nitrogen, CuSO\(_4\) acts as:
JEE Main - 2024
JEE Main
Chemistry
Quantitative Analysis
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