List of top Chemistry Questions

The total number of electrons in $18\, ml$ of water (density $= 1\, g \,ml^{-1} $) is

Which of the following is a negatively charged bidentate ligand ?

The atomic number of cobalt is $27$. The $EAN$ of cobalt in $Na_3 [Co(NO_2)_4Cl_2]$ is

Fructose reduces Tollen's reagent due to

The correct IUPAC name of the following compound is

Which of the following solutions is an example of negative deviation from Raoult�s law?

All colloidal dispersions have

Benzylamine is a stronger base than aniline because

The mass of a non-volatile solute of molar mass $40\, g \,mol^{-1}$ that should be dissolved in $114\, g$ of octane to lower its vapour pressure by $20 \%$ is

The $s$-block element used as a catalyst in the manufacture of Buna-$S$ rubber is

The state of hybridization of the central atom and the number of lone pairs over the central atom in $POCl_{3}$ are

Under identical conditions, the $S_N1$ reaction will occur most efficiently with

$20\, mL\, 0.1( N )$ acetic acid is mixed with $10\, mL$ $0.1( N )$ solution of $NaOH$. The $pH$ of the resulting solution is $\left( p K_{a}\right.$ of acetic acid is $4.74$ )

If the kinetic energy of an electron is increased four times, the wavelength of the de-Broglie wave associated with it would become

EDTA is a hexadentate ligand. Denticity of a ligand is given by number of lone pairs donated to central atom by a ligand.

Which one among the following alcohols will give iodoform on treatment with iodine and sodium hydroxide?

According to Le-Chatelier's principle, the equilibrium constant of a reversible reaction will not shift by

A transition metal M forms a volatile chloride which has a vapour density of 94.8. If it contains 74.75% of chlorine the formula of the metal chloride will be

The density of a $ 3M $ sodium thiosulphate $ (Na_2S_2O_3) $ solution is $ 1.25\, g/mL $ . Calculate the percent by weight of sodium thiosulphate

Which of the following compounds are optically active?

The $ IUPAC $ name of $ CH_3CH(OH)CH_2CH(CH_3)CHO $ is

In allene $(C_3H_4)$ the type(s) of hybridisation of the carbon atoms, is (are)

During spontaneous discharge of an electrochemical cell Gibb's free energy will

For an electrophilic aromatic substitution reaction

Compounds, $\left.\left[ PtCl _{2} NH _{3}\right)_{4}\right] Br _{2}$ and $\left[ PtBr _{2}\left( NH _{3}\right)_{4}\right] Cl _{2}$, shows the following type of isomerism