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p-Block Elements (Group 13 & 14)

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

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)

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

Ques. 2AIPMT 2007

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

  1. (Si2O52-)n
  2. (SiO32-)n
  3. SiO44-
  4. Si2O76-
Ques. 3AIPMT 2004

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.
Ques. 4AIPMT 2003

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
Ques. 5AIPMT 2001

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+
Ques. 6AIPMT 2000

Which compound is electron deficient?

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

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