List of top Chemistry Questions

How many bonds are there in

Highest oxidation state of $Mn$ is present in

Highest electron affinity is shown by

For a particular reversible reaction at temperature $T, \,\Delta H$ and $\Delta S$ were found to be both $+ve$. If $T_{e}$ is the temperature at equilibrium, the reaction would be spontaneous when

Electrophilic addition reaction is easily given by

EDTA has coordination number

In the electrolysis of which solution, $OH^-$ ions are discharged in preference to $Cl^-$ ions ?

Property of the alkaline earth metals that increases with their atomic number is

The type of hybridisation of carbon atom in graphite, diamond and Buckminster fullerene are respectively

Which of the following is least volatile?

Nylon-$6 6$ is obtained from

The correct order of acidity is

Butter is an example of which type of colloid?

Bromine water reacts with $SO_2$ to form ?

Biuret test is not given by

Beryllium and aluminium exhibit many properties which are similar. But the two elements differ in

$ Pb + Conc. HNO_3$ gives

At $18^{\circ}$C, the conductance of $H^+$ and $CH_3COO^-$ at infinite dilution are $315$ and $35\, mho\, cm^ 2\, eq^{-1}$ respectively. The equivalent conductivity of $CH_3COOH$ at infinite dilution is _____ $mho\,cm^ 2\,eq^{-1}$

$S _{ N } 1$ reaction is basically a solvolysis reaction. Polar protic solvents help the substrate to ionise and by the way get involved in $S _{ N } 1$ reaction.

: Noble gases have positive electron affinity. : Noble gases have stable closed shell electronic configuration.

Helium has the highest value of ionisation energy among all the elements known. Helium has the highest value of electron affinity among all the elements known.

Conductivity of silicon increases by doping it with group-15 elements. Doping means introduction of small amount of impurities like $P, As$ or $Bi$ into the pure crystal.

: Chlorine when solidifies does not have zero entropy even at absolute zero. : Chlorine is a pungent smelling gas and it is difficult to solidify it.

: Calcium carbide on hydrolysis gives ethylene. : Calcium carbide contains $C^{4-}$ anions.

Bond energy and bond dissociation energy have identical value for diatomic molecules. Greater the bond dissociation energy, less reactive is the bond.