Chemistry Question Bank

The type of hybridisation of boron in diborane is (AIPMT 1999)

Which of the following statements about H3BO3 is not correct? (AIPMT 1994)

Which of the following types of forces bind together the carbon atoms in diamond? (AIPMT 1992)

The stability of dihalides of Si, Ge, Sn and Pb increases steadily in the sequence

The most commonly used reducing agent is

Which of the following halides is least stable and has doubtful existence ?

In which of the following the inert pair effect is most prominent ?

The tendency of group 14 elements to show +2 oxidation state increases in the order of

Which of the following ions is the most stable ?

A type of zeolite used to convert alcohols directly into gasoline is

Which of the following is the correct statement about silicones ?

Which one of the following anions is present in the chain structure silicates ? (a) Si O - (b) n (Si O ) - (c) n (SiO ) - (d) SiO - Ans. (c) Sol. There are two general formula of anions of chain silicates are n SiO - …

In SiO , - the tetrahedral molecule, two oxygen atoms are shared in

Glass and cement are two important examples of

Silicon is an important constituent of

Which of the following acids cannot be stored in glass ?

CO2 is not a poisonous gas but there is increase in concentration of CO2 in the atmosphere due to burning of fossil fuels and decompostion of limestone. The increase in concentration of CO2 may lead to

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 ?