Chemistry Question Bank

The hardest substance is

Buckminsterfullerence is

Glass and cement are two important examples of

All members of group 14 when heated in oxygen form oxides. Which of the following is the correct trend of oxides ?

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

Which one of the following oxides is neutral ?

Which of the following oxides can act as a reducing agent ?

An element of group 14 forms two oxides one of which is highly poisonous and neutral. Other oxide can be easily liquefied and compressed to give a solid which is used as a refrigerant under the name of drikold. The el…

Sindoor is represented by

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

Alumina is:

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

The incorrect statement regarding above reactions is:

Alumina is:

Graphite is soft while diamond is hard because

Alumina may be converted into anhydrous aluminium chloride by:

Heating an aqueous solution of aluminium chloride to dryness will give

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

Maximum ability of catenation is shown by

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

AlCl₃ on hydrolysis gives:

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

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

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

Alumina is: