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p-Block Elements (Group 13 & 14) · Question 1

NEET (UG) 2026MCQMedium📈 Topic in 38% papers+4−1
1

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.

Answer

(1) Oxygen exhibits only −2 oxidation state.

Solution

Oxygen shows −2 in most compounds, but −1 in peroxides (H2O2), −½ in superoxides (KO2), +2 in OF2 and +1 in O2F2 ⇒ "only −2" is incorrect.

Other statements are correct (NCERT): catenation C Si > Ge Sn; carbon forms pπ–pπ multiple bonds with itself; BCl3 is monomeric while AlCl3 dimerises (Al2Cl6).

Answer: (1)

NEET (UG) 2026

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

2

The correct statement is

  1. Aluminium has five valence orbitals.
  2. Boron has a maximum covalency of four.
  3. Beryllium has three valence orbitals.
  4. Magnesium has a maximum covalency of four.
RE-NEET (UG) 2026
3

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
NEET (UG) 2023
4

Taking stability as the factor, which one of the following represents correct relationship?

  1. InI3 > InI
  2. AlCl > AlCl3
  3. TlI > TlI3
  4. TlCl3 > TlCl
NEET (UG) 2023
5

Which of the following statements is not correct about diborane?

  1. There are two 3-centre-2-electron bonds.
  2. The four terminal B-H bonds are two centre two electron bonds.
  3. The four terminal hydrogen atoms and the two boron atoms lie in one plane.
  4. Both the boron atoms are sp2 hybridised.
NEET (UG) 2022
6

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.
Out of syllabusNEET (UG) 2022
7

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)
8

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)
9

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
10

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
11

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

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