p-Block Elements (Group 13 & 14)

Identify the incorrect statement from the following:

1. Oxygen exhibits only −2 oxidation state.
2. The order of catenation property of Group 14 elements is C Si > Ge Sn.
3. Carbon has the ability to form pπ–pπ multiple bond with itself.
4. ECl3 (E = B and Al) is a monomer when E = B and a dimer when E = Al.

Match List I with List II: Choose the correct answer from the options given below:

1. A-IV, B-I, C-II, D-III
2. A-III, B-I, C-IV, D-II
3. A-III, B-IV, C-I, D-II
4. A-II, B-IV, C-I, D-III

Choose the correct statement:

1. Diamond and graphite have two dimensional network.
2. Diamond is covalent and graphite is ionic.
3. Diamond is sp3 hybridized and graphite is sp2 hybridized.
4. Both diamond and graphite are used as dry lubricants.

Identify the correct statements from the following :

1. A and C only
2. B and C only
3. C and D only
4. A, B and C only

Which of the following is incorrect statement?

1. GeX4 (X = F, Cl, Br, I) is more stable than GeX2
2. SnF4 is ionic in nature
3. PbF4 is covalent in nature
4. SiCl4 is easily hydrolysed

Which of the following species is not stable?

1. [Sn(OH)6]2-
2. [SiCl6]2-
3. [SiF6]2-
4. [GeCl6]2-

It is because of inability of ns2 electrons of the valence shell to participate in bonding that

1. Sn2+ is oxidising while Pb4+ is reducing
2. Sn2+ and Pb2+ are both oxidising and reducing
3. Sn4+ is reducing while Pb4+ is oxidising
4. Sn2+ is reducing while Pb4+ is oxidising

Which of these is not a monomer for a high molecular mass silicone polymer?

1. Me3SiCl
2. PhSiCl3
3. MeSiCl3
4. Me2SiCl2

The basic structural unit of silicates is

1. SiO32-
2. SiO42-
3. SiO-
4. SiO44-

Which statement is wrong?

1. Beryl is an example of cyclic silicate.
2. Mg2SiO4 is orthosilicate.
3. Basic structural unit in silicates is the SiO4 tetrahedron.
4. Feldspars are not aluminosilicates.

Name the type of the structure of silicate in which one oxygen atom of [SiO4]4- is shared.

1. Linear chain silicate
2. Sheet silicate
3. Pyrosilicate
4. Three dimensional

The straight chain polymer is formed by

1. hydrolysis of CH3SiCl3 followed by condensation polymerisation
2. hydrolysis of (CH3)4Si by addition polymerisation
3. hydrolysis of (CH3)2SiCl2 followed by condensation polymerisation
4. hydrolysis of (CH3)3SiCl followed by condensation polymerisation

Which of the following oxidation states are the most characteristic for lead and tin respectively?

1. +2, +4
2. +4, +4
3. +2, +2
4. +4, +2

Which of the following anions is present in the chain structure of silicates?

1. (Si2O52-)n
2. (SiO32-)n
3. SiO44-
4. Si2O76-

Which one of the following statements about the zeolite is false?

1. They are used as cation exchangers.
2. They have open structure which enables them to take up small molecules.
3. Zeolites are aluminosilicates having three dimensional network.
4. Some of the SiO44- units are replaced by AlO45- and AlO69- ions in zeolites.

PbO2 PbO; G298 < 0 SnO2 SnO; G298 > 0 Most probable oxidation state of Pb and Sn will be

1. Pb4+, Sn4+
2. Pb4+, Sn2+
3. Pb2+, Sn2+
4. Pb2+, Sn4+