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p-Block Elements (Group 13 & 14) · Question 22

NEET 2013 (Karnataka)MCQEasy📈 Topic in 38% papers+4−1
1

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.

Answer

(4) Feldspars are not aluminosilicates.

Solution

(1) Beryl, Be3Al2Si6O18, contains the cyclic Si6O1812- ion ⇒ cyclic silicate ⇒ correct.

(2) Mg2SiO4 contains discrete SiO44- units ⇒ orthosilicate ⇒ correct.

(3) As per NCERT, the basic structural unit of silicates is the SiO44- tetrahedron ⇒ correct.

(4) As per NCERT, when some silicon atoms of the three-dimensional network of silicon dioxide are replaced by aluminium atoms, aluminosilicates such as feldspars and zeolites are formed ⇒ the statement "Feldspars are not aluminosilicates" is wrong.

Answer: (4)

NEET 2013 (Karnataka)

Keep practising — p-Block Elements (Group 13 & 14)

2

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
AIPMT 2011 (Prelims)
3

The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence

  1. BCl3 > BF3 > BBr3
  2. BBr3 > BCl3 > BF3
  3. BBr3 > BF3 > BCl3
  4. BF3 > BCl3 > BBr3
AIPMT 2010 (Prelims)
4

The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence

  1. Al < Ga < In < Tl
  2. Tl < In < Ga < Al
  3. In < Tl < Ga < Al
  4. Ga < In < Al < Tl
AIPMT 2009
5

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
AIPMT 2009
6

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
AIPMT 2007
7

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

  1. (Si2O52-)n
  2. (SiO32-)n
  3. SiO44-
  4. Si2O76-
AIPMT 2007
8

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.
AIPMT 2004
9

Which one of the following compounds is not a protonic acid?

  1. B(OH)3
  2. PO(OH)3
  3. SO(OH)2
  4. SO2(OH)2
AIPMT 2003
10

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+
AIPMT 2001
11

Which compound is electron deficient?

  1. PCl3
  2. BCl3
  3. CCl4
  4. PCl5
AIPMT 2000

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