List of top Chemistry Questions

The ionisation energy of hydrogen atom is 13.6 eV, the ionisation energy of a singly ionised helium atom would be

The compound whose aqueous solution has the highest $P^H$ is

Hypo is used in photography to

The Cl-C-Cl angle in 1,1,2,2-tetrachloroethene and tetrachloromethane will be about

How many chain isomers could be obtained from the alkane, C$_6H_{14} $?

The reaction of $H_2 O_ 2$ with hydrogen sulphide is an example of ................ reaction.

Which of the following is a nitric acid anhydride?

The angle between the overlapping of one s-orbital and one p-orbital is

Equilateral shape has

Which one is formed when sodium phenoxide is heated with ethyl iodide?

An ideal solution is formed when its components

At STP, the density of $CCl_4$ vapour in g/L will be nearest to

The spectrum of helium is expected to be similar to that of

Which one of the following compounds does not exist ?

In 3p-orbital, the number of spherical nodes is

One litre hard water contains 12.00 mg $Mg^{2+}$. Milliequivalents of washing soda required to remove its hardness is

The outermost electronic configuration of the most electronegative element is

The atomic nucleus contains

Which of the following is optically inactive?

The first ionisation potential of Na, Mg, Al and Si are in the

The equivalent weight of MnSO$_4$ is half of its molecular weight, when it converts to

In which mode of expression, the concentration of a solution remains independent of temperature?

For the reaction , $ CO ( g) + H_2 O ( g) \rightleftharpoons \, CO_2 \, ( g) + H_2 \, ( g ) $ at a given temperature, the equilibrium amount of $CO_2 (g)$ can be increased by

Which one of the following is the true covalent oxide of iodine ?

RNA does not possess