Chemistry Question Bank

When excesss of carbon dioxide is passed through lime water, the milkiness first formed disappears due to

AlCl3 on hydrolysis gives:

Which one of the following is not the characteristic property of carbon ?

Graphite is soft while diamond is hard because

Moderate electrical conductivity is shown by

Catenation i.e., linking of similar atoms depends on size and electronic configuration of atoms. The tendency of catenation in Group 14 elements follows the order

There is a large number of carbon compounds due to

Maximum ability of catenation is shown by

Alumina is:

Alumina is:

When alumina is heated with carbon in nitrogen atmo- sphere, the products are:

Which of the following will be formed, if we heat an aqueous solution of AlCl3 to dryness ?

Heating an aqueous solution of aluminium chloride to dryness will give

Alumina may be converted into anhydrous aluminium chloride by:

The incorrect statement regarding above reactions is:

Select the true statements: (i) The formula of the corundum is Al2O3. (ii) The formula of cryolite is Na3AlF6. (iii) The formula of borax is Na2B4O7.10H2O (iv) The formula of bauxite is Al2O3.H2O

In the purification of bauxite by Hall’s process:

AIF3 is soluble in HF only in presence of KF. It is due to the formation of

When excess of NaOH solution is added in potash alum, the product is:

Complex formation is more likely to be possible in _____

Al2O3 formation from aluminium and oxygen involves evolution of a large quantity of heat, which makes alu- minium used in:

Aluminium vessels should not be washed with materials containing washing soda since :

Which one is the wrong statement ?

Alumina is:

Thermite is a mixture of iron oxide and