List of top Chemistry Questions

The major product obtained on interaction of phenol with sodium hydroxide and carbondioxide is

The $M - O - M$ bond angles in $M_2O$ (where $M$ is halogen) is in the order

The IUPAC name of $ K[Ag(CN)_{2}]$ is

The energy absorbed by each molecule $(A_2)$ of a substance is $4.4\times 10^{-19} J$ and bond energy per molecule is $4.0\times 10^{-19} J$The kinetic energy of the molecule per atom will be

The electrophile involved in the sulphonation of Benzene is

The correct order of stability of the superoxides is

The alkene that exhibits geometrical isomerism is

The acidic nature of carboxylic acids $RCOOH \longrightarrow RCOO ^{-}+ H ^{+}$is due to

The abbreviation BOD stands for

$t_{1 / 2}$ for a first order reaction is $10\, \min$. Starting with $10\, M$, the rate after $20\, \min$ is

Sulphonation of phenol with conc. $H _{2} SO _{4}$ at $288-293\, K$ gives

Oxidation state of oxygen in $F_{2}O$ is

Oxidation numbers of P in $PO_4^{ 3 - } $, of $S$ in $SO_4^{2 - }$ and that of $ Cr$ in $Cr_2 O_7^{ 2 - } $ respectively are

$0.42 \,g$ magnesium carbonate and $0.5\, g$ calcium carbonate are; heated strongly. What is the quantity left?

$NH_{3}$ has higher boiling point than expected because

Most acidic amongst the following is

Knowing that the Chemistry of lanthanoids $(Ln)$ is dominated by its $+3$ oxidation state, which of the following statements in incorrect ?

In zone refining method, the molten zone

$2$-acetoxy benzoic acid is

The number of radial nodes of $3\,s$ and $2\,p$ orbital are

Which is necessary for conversion of butane-$2$-one into propanoic acid?

The ratio of rates of diffusion of helium and methane under same conditions of temperature and pressure will be

Adsorption of gases on solid surface is exothermic since

A sodium salt on treatment with $ MgCl_{2}$ gives white precipitate on heating. The anion of sodium salt is

In solid $CuSO_{4} \cdot 5H_{2}O$ copper is coordinated to number of water molecules