Chemistry Question Bank

Carbon and silicon belong to (IV) group. The maximum coordination number of carbon in commonly occurring compounds is 4, whereas that of silicon is 6. This is due to (AIPMT 1994)

Buckminsterfullerence is

The hardest substance is

Sindoor is represented by

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

Which one of the following oxides is neutral ?

Identify the wrong example from the following for the group 14 elements.

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

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…

Aluminium chloride exists as dimer, Al2Cl6 in solid state as well as in solution of non-polar solvents such as benzene. When dissolved in water, it gives

Which of the following is not from 14 th group

Match the column I with column II and mark the appropriate choice. Column I Column II (A) Coal gas (i) CO + H2 (B) Synthesis gas (ii) CH4 (C) Producer gas (iii) H2 + CH4 + CO (D) Natural gas (iv) CO + N2

Identify X in the reaction : (steam) X 2H O XO 2H D + ¾¾® +

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 ?