Chemistry Question Bank

The hardest substance is

Buckminsterfullerence is

Glass and cement are two important examples of

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…

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

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 oxides is neutral ?

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 oxides can act as a reducing agent ?

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

Alumina is:

Alumina is:

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

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

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:

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

Heating an aqueous solution of aluminium chloride to dryness will give

Maximum ability of catenation is shown by

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

Graphite is soft while diamond is hard because

Complex formation is more likely to be possible in _____

Which one is the wrong statement ?

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

Thermite is a mixture of iron oxide and