List of top Chemistry Questions

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

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

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

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

The acid having $ O-O $ bond is

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

In Oppenauer's oxidation,

In an isobaric process, when temperature changes from $T_1$ to $T_2$, $\Delta S$ is equal to