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JEE Main
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Chemistry
List of top Chemistry Questions asked in JEE Main
If the boiling points of two solvents X and Y (having same molecular weights) are in the ratio 2:1 and their enthalpy of vaporizations are in the ratio 1:2, then the boiling point elevation constant of X is m times the boiling point elevation constant of Y. The value of m is ______ (nearest integer).
JEE Main - 2023
JEE Main
Chemistry
Solutions
For complete combustion of ethene,
\(C_2H_4(g) + 3O_2(g) \longrightarrow 2CO_2(g) + 2H_2O (l)\)
the amount of heat produced as measured in bomb calorimeter is 1406 kJ mol
-1
at 300K. The minimum value of
\(T\Delta S\)
needed to reach equilibrium is (-) _____ . kJ.(Nearest integer)
Given: R = 8.3 J K
-1
mol
-1
JEE Main - 2023
JEE Main
Chemistry
Law Of Chemical Equilibrium And Equilibrium Constant
The number of species from the following carrying a single lone pair on central atom Xenon is ______ .
XeF
5
+
, XeO
3
, XeO
2
F
2
, XeF
5
-
, XeO
3
F
2
, XeOF
4
, XeF
4
JEE Main - 2023
JEE Main
Chemistry
Structure of atom
Given below are two statements:
Statement I: In redox titration, the indicators used are sensitive to change in pH of the solution.
Statement II: In acid-base titration, the indicators used are sensitive to change in oxidation potential.
In the light of the above statements, choose the most appropriate answer from the options given below
JEE Main - 2023
JEE Main
Chemistry
Balancing a redox reaction
Match List l with List ll.
List I Natural amino acid
List II One letter code
(I) Glutamic acid
(a) Q
(II) Glutamine
(b) W
(III) Tyrosine
(c) E
(IV) Tryptophan
(d) Y
Choose the correct answer from the options given below:
JEE Main - 2023
JEE Main
Chemistry
Classification Of Organic Compounds
The statement/s which are true about antagonists from the following is/are:
A. They bind to the receptor site.
B. Get transferred inside the cell for their action.
C. Inhibit the natural communication of the body.
D. Mimic the natural messenger.
Choose the correct answer from the options given below:
JEE Main - 2023
JEE Main
Chemistry
Chemical Reactions
The product (P) formed from the following multistep reaction is:
JEE Main - 2023
JEE Main
Chemistry
Chemical Reactions
At constant temperature, a gas is at a pressure of 940.3 mm Hg. The pressure at which its volume decreases by 40% is mm Hg. (Nearest integer)
JEE Main - 2023
JEE Main
Chemistry
Gas laws
The descending order of acidity for the following carboxylic acid is-
A. CH
3
COOH
B. F
3
C-COOH
C. CICH
2
-COOH
D. FCH
2
-COOH
E. BrCH
2
-COOH
Choose the correct answer from the options given below:
JEE Main - 2023
JEE Main
Chemistry
Classification of elements and periodicity in properties
The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous NaOH is
Choose the correct answer from the options given below:
JEE Main - 2023
JEE Main
Chemistry
Order of Reaction
The correct IUPAC nomenclature for the following compound is.
JEE Main - 2023
JEE Main
Chemistry
Nomenclature Of Organic Compounds
The number of bent-shaped molecule(s) from the following is_______?
SO
2
, O
3
, I
3
-
, N
3
-
JEE Main - 2023
JEE Main
Chemistry
coordination compounds
The Sum of number of lone pairs in central atom in IF
5
and IF
7
is:
JEE Main - 2023
JEE Main
Chemistry
d -and f -Block Elements
In the following reactions, the total number of oxygen atoms in X and Y is _______
Na
2
O + H
2
O → 2X
Cl
2
O
7
+ H
2
O → 2Y
JEE Main - 2023
JEE Main
Chemistry
Chemical Reactions
Major product 'P' formed in the following reaction is:
JEE Main - 2023
JEE Main
Chemistry
Chemical Reactions
Which of these reactions is not a part of breakdown of ozone in stratosphere?
JEE Main - 2023
JEE Main
Chemistry
Environmental Chemistry
Match List l with List ll.
List I Coordination Complex
List II Number of unpaired electrons
(I) [Cr(CN)
6
]
3-
(a) 0
(II) [Fe(H
2
O)
6
]
2+
(b) 3
(III) [Co(NH
3
)
6
]
3+
(c) 2
(IV) [Ni(NH
3
)
6
]
2+
(d) 4
Choose the correct answer from the options given below:
JEE Main - 2023
JEE Main
Chemistry
Classification of elements and periodicity in properties
Which of the following have same number of significant figures?
A. 0.00253
B. 1.0003
C. 15.0
D. 163
Choose the correct answer from the options given below
JEE Main - 2023
JEE Main
Chemistry
Structure of atom
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R
Assertion A : Sodium is about 30 times as abundant as potassium in the oceans.
Reason R : Potassium is bigger in size than sodium.
In the light of the above statements, choose the correct answer from the options given below
JEE Main - 2023
JEE Main
Chemistry
Classification of elements and periodicity in properties
In Hall - Heroult process, the following is used for reducing Al
2
O
3
:-
JEE Main - 2023
JEE Main
Chemistry
Chemical Reactions
Henry Moseley studied characteristic X-ray spectra of elements. The graph which represents his observation correctly is
Given v = frequency of X-ray emitted
Z = atomic number
JEE Main - 2023
JEE Main
Chemistry
Discovery of Sub-atomic Particles
Lime reacts exothermally with water to give ‘A’ which has low solubility in water. Aqueous solution of ‘A’ is often used for the test of CO2 , a test in which insoluble B is formed. If B is further reacted with CO2 then soluble compound is formed ‘A’ is
JEE Main - 2023
JEE Main
Chemistry
Solutions
The correct reaction profile diagram for a positive catalyst reaction .
JEE Main - 2023
JEE Main
Chemistry
Chemical Reactions
Arrange the following gases in increasing order of van der Waals constant 'a'
A. Ar
B. CH4
C. H₂O
D. C6H6
Choose the correct option from the following.
JEE Main - 2023
JEE Main
Chemistry
Van Der Waals equation
Identify the correct order of reactivity for the following pairs towards the respective mechanism
Choose the correct answer from the options given below :
JEE Main - 2023
JEE Main
Chemistry
Classification Of Organic Compounds
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