List of top Chemistry Questions

The reactivity order of the following molecules towards SN1 reaction is:
Allyl chloride (I), Chlorobenzene (II), Ethyl chloride (III)

pH of 10⁻⁸ M HCl solution is:

How many P–O–Plinkages are there in P₄O₁₀?

Which of the following statements is true about the equilibrium constant and rate constant of a single-step chemical reaction?

The correct acidity order of phenol (I), 4-hydroxybenzaldehyde (II), and 3-hydroxybenzaldehyde (III) is:

Number of moles of ions produced by the complete dissociation of one mole of Mohr’s salt in water is:

Which of the following ion/ions is/are diamagnetic?

Identify the correct statement(s):

Toluene reacts with mixed acid at 25°C to produce:

Ozonolysis of o-xylene produces:

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:

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:

Which of the following statements about the S_N2 reaction mechanism is/are true?

Q and R in the reaction sequences are respectively:

Which of the following represent(s) the enantiomer of Y?

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 contains the maximum number of lone pairs on the central atom?

The compounds A and B are respectively:

From the compounds given below, the number of compounds which give a positive Fehling’s test is____.
Compounds: Benzaldehyde, Acetaldehyde, Acetone, Acetophenone, Methanal, 4-nitrobenzaldehyde, cyclohexane carbaldehyde.

A hypothetical electromagnetic wave is show below.

The frequency of the wave is x × 10¹⁹ Hz. x = ______ (nearest integer)

Identify A and B in the given chemical reaction sequence : -