List of top Chemistry Questions

The formula for permutit or zeolite which is used as softner in ion-exchange method is

The following reaction is known as $ {C6H6 + CH3Cl ->[AlCl_3][(\text{anhy}.)] C6H5CH3 + HCl}$

The first ionization energies of group 16 elements

The first line of the Lyman series in a hydrogen spectrum has a wavelength of $1210 ??. The corresponding line of a hydrogen- like atom of $Z = 11$ is equal to

The fire extinguisher 'pyrene' contains

The element with the outer electronic configuration $3d^64s^2$ is a :

The electroplating with chromium is undertaken because

The electronic configuration of a dipositive ion $M^{2+}$ is 2, 8, 14 and its mass number is 56. The number of neutrons present is

The electronic configuration $1s^2,2s^2, 2p^6, 3s^1$ and $3p^1$ is correctly describe by

The electron affinity of Noble gases is

The correct order of acidity for the following compounds is

The calorific value of fat is

The basicity of $H_3PO_4$ is

The aqueous solution of which of the following has maximum pH ?

The acid used in lead storage cells is

Sweet spirit of nitre is

Sulphuric acid provides a simple example of

Species Plantarum and Systema Naturae were written by

Smoke is an example of :

Small liquid droplets dispersed in another liquid is called

$SiO_2$ is a/an

$SiH_4 + NaOH + H_2O-------> X + 3H_2 X$ in the above reaction is

Select the species acting as reductant and oxidant in the following. $ {PCl3 + Cl2 -> PCl5}$

Sea divers go deep in the sea water with a mixture of which of the following gases?

Red colour complex ion formed on adding $FeCl_3$ to S.E. (sodium extract) when N and S both are present in organic compound is