PbO2  PbO                     G298 <0
SnO2SnO                       G298 > 0

The most probable oxidation state of Pb & Sn will be:

1. Pb+4, Sn+4

2. Pb+4 , Sn+2

3. Pb+2 , Sn+2

4. Pb+2 , Sn+4

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 73%
From NCERT
AIPMT - 2001
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In a Borax bead test, which compound is formed: 

1. Orthoborate

2. Metaborate

3. Double oxide

4. Tetraborate

Subtopic:  Boron Family- Preparations, Properties & Uses |
 83%
From NCERT
AIPMT - 2002
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Incorrect statement among the following about zeolites is:

1. They have an open structure which enables them to take up small molecules.
2. Zeolites are aluminosilicates having a three-dimensional network.
3. Some of the \(\mathrm{SiO}_4^{4-}\)units are replaced by \(\mathrm{AlO}_4^{5-}\) and \(\mathrm{AlO}_6^{9-}\) ions in zeolites.
4. They are used as cation exchangers.
Subtopic:  Boron Family- Preparations, Properties & Uses |
 54%
From NCERT
AIPMT - 2004
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