List of top Chemistry Questions

In the following sequence of reactions, compound 'M' is:

\( \text{M} \xrightarrow{\text{CH}_3\text{MgBr}} \text{N} + \text{CH}_4 \uparrow \xrightarrow{\text{H}^+} \text{CH}_3\text{COCH}_2\text{COCH}_3 \)

The compressibility factor for a van der Waals gas at high pressure is
The compound that does not give a positive test for nitrogen in Lassaigne’s test is
For a first-order reaction with rate constant k, the slope of the plot of log(reactant concentration) against time is:
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.\\
Which of the following species exhibits both LMCT and paramagnetism?
The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)
Which hydrogen-like species will have the same radius as the 1st Bohr orbit of a hydrogen atom?
Correct solubility order of AgF, AgCl, AgBr, AgI in water is:
Identify the incorrect statement among the following:
The decreasing order of reactivity of the following alkenes towards HBr addition is: \(\text{CH}_3-\text{CH}=\text{CH}_2 \, (\text{I}), \quad \text{CF}_3-\text{CH}=\text{CH}_2 \, (\text{II}), \quad \text{MeOCH}=\text{CH}_2 \, (\text{III}),\) alkenes, \((\text{IV}) \)
The number(s) of -OH group(s) present in H3PO3 and H3PO4 is/are:
How many P–O–Plinkages are there in P4O10?
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:

Identify the ion having 4f\(^6\) electronic configuration.

Q and R in the reaction sequences are respectively:
Q and R in the reaction
Which of the following statement(s) is/are correct?
What will be the change in acidity if:
(i) CuSO4 is added to saturated (NH4)2SO4 solution,
(ii) SbF5 is added to anhydrous HF?
Which of the following ion/ions is/are diamagnetic?
Metallic conductors and semiconductors are heated separately. What are the changes in conductivity?
pH of 10−8 M HCl solution is:
The correct order of boiling points of the given aqueous solutions is

One of the reactions A, B, C, D given below yields a product which will not answer Hinsberg's test when reacted with Benzene sulphonyl chloride. Identify the reaction.

Identify the final product formed when Toluene undergoes a series of reactions with reagents given in the order: 
(i) \( \text{Cl}_2 / \text{Sunlight} \)
(ii) \( \text{H}_2\text{O}/373 \, \text{K} \)
(iii) Acetophenone / \( \text{OH}^- \) at 293 K

4 statements are given below. Identify the incorrect statement:

(A) Phenol has lower \( pK_a \) value than \( \text{p} \)-cresol.
(B) 2-Chlorophenol is more acidic than phenol.
(C) Ortho and para nitrophenols can be separated by steam distillation since \( \text{p} \)-Nitrophenol is more steam volatile than \( o \)-Nitrophenol.
(D) Phenol on reaction with \( \text{Cr}_2\text{O}_7^{2-} / \text{H}^+ \) yields a conjugated diketone.