List of top Chemistry Questions

Choose the INCORRECT pair of MOLECULE and its SHAPE among the following:

The correct increasing order of dipole moment of \( NF_3, H_2S, CHCl_3 \) and \( NH_3 \) is

Which of the following pair of oxides is neutral?

Which of the following experimental phenomenon is explained by the wave nature of electromagnetic radiation?

The Vividh Bharati station of All India Radio, Kozhikode, broadcasts on a frequency of \( 1500\,\text{kHz} \). What is the wavelength of the electromagnetic radiation emitted by the transmitter? \( (c = 3\times10^8\,\text{m s}^{-1}) \)

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