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Chemistry
List of top Chemistry Questions
The equivalent weight of \(\text{Na}_2\text{S}_2\text{O}_3\) (Gram molecular weight = \(M\)) in the given reaction is:
\[\text{I}_2 + 2 \text{Na}_2\text{S}_2\text{O}_3 \rightarrow 2 \text{NaI} + \text{Na}_2\text{S}_4\text{O}_6\]
WBJEE - 2024
WBJEE
Chemistry
Redox reactions
Which of the following statements is true about the equilibrium constant and rate constant of a single-step chemical reaction?
WBJEE - 2024
WBJEE
Chemistry
Chemical Kinetics
Q and R in the reaction sequences are respectively:
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WBJEE
Chemistry
Reaction mechanisms
The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)
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WBJEE
Chemistry
Reaction mechanisms
Identify the ion having 4f\(^6\) electronic configuration.
WBJEE - 2024
WBJEE
Chemistry
Some Applications of d- and f-Block Elements
The compressibility factor for a van der Waals gas at high pressure is
WBJEE - 2024
WBJEE
Chemistry
Gas laws
After the emission of a β-particle followed by an α-particle from \(^{214}_{83}\text{Bi}\), the number of neutrons in the atom is:
WBJEE - 2024
WBJEE
Chemistry
Nuclear Chemistry
For a spontaneous process, the incorrect statement is:
WBJEE - 2024
WBJEE
Chemistry
Thermodynamics
Which of the following ion/ions is/are diamagnetic?
WBJEE - 2024
WBJEE
Chemistry
Electronic Configurations Of Elements And The Periodic Table
Equal volumes of aqueous solution of 0.1 M HCl and 0.2 M H
2
SO
4
are mixed. The concentration of H+ ions in the resulting solution is:
WBJEE - 2024
WBJEE
Chemistry
Ionic Equilibrium
For a first-order reaction with rate constant k, the slope of the plot of log(reactant concentration) against time is:
WBJEE - 2024
WBJEE
Chemistry
Chemical Kinetics
Correct solubility order of AgF, AgCl, AgBr, AgI in water is:
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WBJEE
Chemistry
Solubility products
Which of the following statement(s) is/are correct?
WBJEE - 2024
WBJEE
Chemistry
Solubility products
Toluene reacts with mixed acid at 25°C to produce:
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WBJEE
Chemistry
Aromaticity & chemistry of aromatic compounds
Which hydrogen-like species will have the same radius as the 1st Bohr orbit of a hydrogen atom?
WBJEE - 2024
WBJEE
Chemistry
Atomic Structure
Consider an electron moving in the first Bohr orbit of a He\(^+\) ion with velocity \(v_1\). If it is allowed to move in the third Bohr orbit with velocity \(v_3\), determine the correct \(v_3 : v_1\) ratio.\\
WBJEE - 2024
WBJEE
Chemistry
Atomic Structure
pH of 10
−8
M HCl solution is:
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WBJEE
Chemistry
Ionic Equilibrium
The compounds A and B are respectively:
WBJEE - 2024
WBJEE
Chemistry
Reaction mechanisms
The degree of dissociation of acetic acid is:
WBJEE - 2024
WBJEE
Chemistry
Ionic Equilibrium
The major product of the following reaction is:
WBJEE - 2024
WBJEE
Chemistry
Reaction mechanisms
What will be the change in acidity if:
(i) CuSO
4
is added to saturated (NH
4
)
2
SO
4
solution,
(ii) SbF
5
is added to anhydrous HF?
WBJEE - 2024
WBJEE
Chemistry
Ionic Equilibrium
Which of the following species exhibits both LMCT and paramagnetism?
WBJEE - 2024
WBJEE
Chemistry
coordination compounds
Identify the incorrect statement among the following:
WBJEE - 2024
WBJEE
Chemistry
Properties of Liquids
The number(s) of -OH group(s) present in H
3
PO
3
and H
3
PO
4
is/are:
WBJEE - 2024
WBJEE
Chemistry
The p-Block Elements
How many P–O–Plinkages are there in P
4
O
10
?
WBJEE - 2024
WBJEE
Chemistry
The p-Block Elements
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