The correct statement regarding polymeric silicon dioxide is -

 
1. Each silicon atom is surrounded by four oxygen atoms and each oxygen atom is bonded to two silicon atoms.
2. Each silicon atom is surrounded by two oxygen atoms and each oxygen atom is bonded to two silicon atoms.
3. Silicon atom is bonded to two oxygen atoms.
4. These are double bonds between silicon and oxygen atoms.

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 80%
From NCERT
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PbO2 on reaction with HNO3 gives gas:

1. NO2

2. O2

3.  N2

4.  N2O

Subtopic:  Properties of Glass, Pb & Sn compounds |
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AlF3 is soluble in HF only in the presence of KF due to the formation of:

1. K3[AlF3H3] 2. K3[AlF6]
3. AlH3 4. K[AlF3H]
Subtopic:  Boron Family- Preparations, Properties & Uses |
 79%
From NCERT
NEET - 2016
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The correct statement among the following is :

1. Sn2+ is an oxidizing agent while Pb4+ is a reducing agent.
2. Sn2+ and Pb2+ both are oxidizing agents.
3. Sn4+ is a reducing agent while Pb4+ is an oxidizing agent.
4. Sn2+ is a reducing agent while Pb4+ is an oxidizing agent.

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 67%
From NCERT
NEET - 2017
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An element that cannot form MF63- ion is-

1. Ga 2. Al
3. B 4. In
Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
 80%
From NCERT
NEET - 2018
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The correct order of atomic radii of the 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

Subtopic:  Boron Family- Preparations, Properties & Uses |
 67%
From NCERT
NEET - 2018
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In which of the following pairs, both the species are not isostructural?

1. \(\mathrm{SiCl}_4, \mathrm{PCl}_4^{+}\)
2. Diamond, silicon carbide
3. \(\mathrm{NH}_3, \mathrm{PH}_3\)
4. \(\mathrm{XeF}_4, \mathrm{XeO}_4\)
 

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 63%
From NCERT
NEET - 2015
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The stability of +1 oxidation state among Al, Ga, In and Tl increases in the sequence?
1. Ga < ln < Al < Tl
2. Al < Ga < ln < Tl
3. Tl < ln < Ga < Al
4. ln < Tl < Ga < Al

Subtopic:  Boron Family- Preparations, Properties & Uses |
 89%
From NCERT
NEET - 2015
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A compound among the following having a similar structure to graphite is:

1. B
2. B4C
3. B2H6
4. BN

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 64%
From NCERT
AIPMT - 2013
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Which of these is not a monomer for a high molecular mass silicone polymer?

1. Me2SiCl2 2. Me3SiCl
3. PhSiCl3 4. MeSiCl3
Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 56%
From NCERT
AIPMT - 2013
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