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p-Block Elements (Group 13 & 14) · Question 6

NEET (UG) 2022MCQEasy📈 Topic in 38% papers+4−1
1

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.

Answer

(3) Diamond is sp3 hybridized and graphite is sp2 hybridized.

Solution

As per NCERT, in diamond each carbon atom is sp3 hybridised and linked tetrahedrally to four other carbon atoms, giving a rigid three-dimensional network.

In graphite each carbon atom is sp2 hybridised and bonded to three others in hexagonal layers.

(1) is wrong: only graphite has a two-dimensional (layered) structure.

(2) is wrong: both are covalent solids.

(4) is wrong: graphite (slippery layers) is a dry lubricant; diamond is used as an abrasive.

Answer: (3)

Out of syllabusNEET (UG) 2022

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

2

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

  1. (a)-(i), (b)-(iii), (c)-(iv), (d)-(ii)
  2. (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)
  3. (a)-(ii), (b)-(iv), (c)-(iii), (d)-(i)
  4. (a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
NEET (UG) 2022 (Phase 2)
3

Na2B4O7 heat X + NaBO2 in the above reaction the product "X" is :

  1. NaB3O5
  2. H3BO3
  3. B2O3
  4. Na2B2O5
NEET (UG) 2022 (Phase 2)
4

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
NEET (UG) 2020
5

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
NEET (UG) 2019
6

Which of the following species is not stable?

  1. [Sn(OH)6]2-
  2. [SiCl6]2-
  3. [SiF6]2-
  4. [GeCl6]2-
NEET (UG) 2019
7

The correct order of atomic radii in group 13 elements is

  1. B < Al < In < Ga < Tl
  2. B < Al < Ga < In < Tl
  3. B < Ga < Al < Tl < In
  4. B < Ga < Al < In < Tl
NEET 2018
8

Which one of the following elements is unable to form MF63- ion?

  1. Ga
  2. Al
  3. B
  4. In
NEET 2018
9

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
NEET 2017
10

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)
11

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)

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