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p-Block Elements (Group 13 & 14) · Question 27

AIPMT 2007MCQEasy📈 Topic in 38% papers+4−1
1

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

Answer

(1) +2, +4

Solution

Down group 14 the inert pair effect increases, so the lower (+2) oxidation state becomes more stable.

As per NCERT, tin in the +2 state is a reducing agent (it changes to the more stable +4 state), whereas lead compounds in the +4 state are strong oxidising agents (they change to the more stable +2 state).

∴ Most characteristic: Pb → +2, Sn → +4.

Answer: (1)

AIPMT 2007

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

2

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
3

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
4

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
5

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
6

Which compound is electron deficient?

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

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