List of top Chemistry Questions

A monoatomic anion of unit charge contains 45 neutrons and 36 electrons. Identify the ion.

For $d$-electron, the orbital angular momentum is

The decreasing order of basic character of $K_2O,\, BaO, \, CaO$ and $MgO$ is

The conversion of nitriles to aldehydes with stannous chloride in presence of $HCl$ is known as

The carbocation formed in $S_{N}1$ reaction of alkyl halide in the slow step is

Lucas reagent is equimolar solution of

For a reaction, $NO (g)+ O _{2}(g) \rightarrow 2 NO _{2}(g) ;$ Rate $=k l[N O]^{2}\left[O_{2}\right]$. If the volume of the reaction vessel is doubled, the rate of reaction

Two moles of an ideal gas are allowed to expand reversibly and isothermally at $300\, K$ from a pressure of $1\, atm$ to a pressure of $0.1\, atm$. The change in Gibbs free energy is

1.0 g of magnesium is burnt with 0.56 g O₂ in a closed vessel. Which reactant is left in excess and how much? (At. wt. Mg = 24 ; O = 16)

What happens when an inert gas is added to an equilibrium keeping volume unchanged ?

If $m$ and $e$ are the mass and charge of the revolving electron in the orbit of radius $r$ for hydrogen atom, the total energy of the revolving electron will be :

The total number of octahedral void(s) per atom present in a cubic close packec structure is :-

The most suitable reagent for the conversion of $RCH_2OH \to RCHO$ is

In the Victor-Meyer's test, the colour given by $1^{\circ}$, $2^{\circ}$and $3^{\circ}$ alcohols are respectively :

For the compounds $CH_3Cl, \, CH_3Br,\,CH_3I$ and $CH_3F,$ the correct order of increasing $C$-halogen bond length is :

Tischenko reaction is a modification of :

\(Be^{2+}\) is isoelectronic with which of the following ions?

Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

Reason of lanthanoid contraction is:

Which of the following complexes is used to be as an anticancer agent?

When 22.4 litres of H₂(g) is mixed with 11.2 litres of Cl₂ (g), each at S.T.P., the moles of HCl (g) formed is equal to :

Equal masses of H₂, O₂ and methane have been taken in a container of volume V at temperature 27°C in identical conditions. The ratio of the volumes of gases H₂ : O₂ : methane would be :

Which one of the following species has plane triangular shape?

Which of the following molecules has the maximum dipole moment?

D(+) glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be: