List of top Chemistry Questions

Among second period elements/the correct order for first ionisation enthalpy is

$H A$ is a weak acid. At $25^{\circ} C$, the molar conductivity of $0.02\, M\, H A$ is $150\, \Omega^{-1} cm ^{2} mol ^{-1}$. If its $\Lambda_{ m }^{ o }$ is $300\, \Omega^{-1} cm ^{2} mol ^{-1}$, then equilibrium constant of $H A$ dissociation is

Nylon is a

$K_{p} / K_{c}$ for the reaction $A(g)+2 B_{2}(g) \rightleftharpoons A B_{2}(g)$ is

n-hexane on heating to $773 \,K$ at $10-20$ atmospheric pressure in the presence of oxides of vanadium supported over alumina, yields

A gas at high temperature is cooled. The highest temperature at which liquefaction of gas first occurs is called

The compound formed upon combustion of potassium metal in excess air is

The number of tetrahedral and octahedral void per unit cell of cubic closed packed structure is

When the following amide is treated with $Br_{2}/KOH$, it gives

In an acidified aqueous solution of $Mn ^{2+}, Ni ^{2+}, Cu ^{2+}$ and $Hg ^{2+}$ ions, $H _{2} S$ gas was passed. Precipitates are

One mole of NaCl contains 6.023 ??10 molecules of sodium chloride. 58.5 g of NaCl also contains 6.023 ??10 molecules of NaCl.

A gas such as carbon monoxide would be most likely to obey the ideal gas law at :

Decreasing order of stability of $O_2, O^-_2, O_2^+ $ and ${ O_2^{2-}}$ is :

In which of the following pairs, both the species are not isostructural ?

The number of water molecules is maximum in :

Assuming complete ionization, same moles of which of the following compounds will require the least amount of acidified ${KMnO4}$ for complete oxidation ?

Glycogen is

Pick the incorrect statement among those given below.

Which of the following compounds is responsible for depletion of ozone layer?

Sulphur sol is an example of

The mass of oxygen gas which occupies $5.6$ litres at STP would be

The cathode reaction in the dry cell will be