List of top Chemistry Questions

The density of \( 3\,M \) aqueous solution of a solute \( X \) is \( 1.86\,\text{g mL}^{-1} \). The molality of the solution is (Molar mass of solute \( X \) is \( 120\,\text{g mol}^{-1} \))
If \( \lambda \) be the wavelength of any electromagnetic radiation, the de-Broglie wavelength of its quantum (photon) is
The work done in splitting a spherical liquid drop of radius \( a \) into eight liquid droplets of the same size (surface tension of the liquid = \( S \)) is
If the threshold wavelength of a photoelectric material lies in the green light region, then which one of the following light will not emit photoelectrons?
Which one of the following molecules is nonpolar?
If T and \(\eta\) are the surface tension and coefficient of viscosity of a liquid, then with the increase of temperature
The following amines are having same molecular masses. (i) n-C\(_4\)H\(_9\)NH\(_2\) (ii) (C\(_2\)H\(_5\))\(_2\)NH (iii) C\(_2\)H\(_5\)N(CH\(_3\))\(_2\). The correct order of boiling point of the above amines is
Carbylamine is obtained when aniline is
Aniline on treatment with NaNO\(_2\) and HCl at 278K gives compound (Y). When the compound (Y) is treated with Cu/HBr, compound 'Z' is obtained. The compound 'Z' is
The reagent/s employed in Etard reaction is/are
Which of the following carboxylic acid is used in the manufacture of nylon-6,6?
Lucas reagent is
Which of the following is the weakest acid?
Acetone can be converted into 2-methylpropan-2-ol using
Phenetole is
An optically active compound among the following is
When chlorobenzene is treated with acetyl chloride in the presence of anhydrous AlCl\(_3\), 4-Chloroacetophenone is formed as the major product. It is an example of
Which of the following compound will have highest boiling point?
The hydrocarbon that forms disodium salt with excess metallic sodium is
The ortho-, para-directing and deactivating group in aromatic electrophilic substitution reaction is
Which of the following compound does not exhibit aromaticity?
When bromoethane is treated with metallic Na in dry ethereal solution, n-butane is formed. This reaction is known as
Which of the following functional groups will show -R effect?
Which one of the following is an example of heterocyclic aromatic compound?
Which of the following complex ion is diamagnetic?