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

NEET 2017MCQEasy📈 Topic in 38% papers+4−1
1

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

Answer

(4) Sn2+ is reducing while Pb4+ is oxidising

Solution

The inability of ns2 electrons to take part in bonding (inert pair effect) increases down group 14.

Sn: +4 state is more stable than +2 ⇒ Sn2+ readily changes to Sn4+ ⇒ Sn2+ is reducing.

Pb: +2 state is more stable than +4 ⇒ Pb4+ readily changes to Pb2+ ⇒ Pb4+ is oxidising.

As per NCERT, tin in +2 state is a reducing agent and lead compounds in +4 state are strong oxidising agents.

Answer: (4)

NEET 2017

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

2

Boric acid is an acid because its molecule

  1. contains replaceable H+ ion
  2. gives up a proton
  3. accepts OH- from water releasing proton
  4. combines with proton from water molecule.
NEET 2016 (Phase 2)
3

AlF3 is soluble in HF only in presence of KF. It is due to the formation of

  1. K3[AlF3H3]
  2. K3[AlF6]
  3. AlH3
  4. K[AlF3H]
NEET 2016 (Phase 2)
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 2015
5

Which of the following is electron-deficient ?

  1. (BH3)2
  2. PH3
  3. (CH3)2
  4. (SiH3)2
NEET 2013
6

Which of the following structure is similar to graphite?

  1. B4C
  2. B2H6
  3. BN
  4. B
NEET 2013
7

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

  1. Me3SiCl
  2. PhSiCl3
  3. MeSiCl3
  4. Me2SiCl2
NEET 2013
8

The basic structural unit of silicates is

  1. SiO32-
  2. SiO42-
  3. SiO-
  4. SiO44-
NEET 2013
9

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  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.
NEET 2013 (Karnataka)
10

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)
11

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)

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