A compound among the following that is least likely to behave as a Lewis base is:

1. NH3 2. BF3
3. OH- 4. H2O

Subtopic:  Anomalous Behaviour of B & C |
 79%
From NCERT
AIPMT - 2011
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Al2O3 can be converted to anhydrous AlCl3 by heating:

1. Al2O3 with HCl gas

2. Al2O3 with NaCl in solid-state

3. a mixture of Al2O3  and carbon in dry Cl2 gas

4. Al2O3  with Cl2 gas

Subtopic:  Boron Family- Preparations, Properties & Uses |
AIPMT - 2006
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The incorrect statement among the following is:

1.  SnF4 is ionic in nature.

2.  PbF4 is covalent in nature.

3.  SiCl4 is easily hydrolysed.

4.  GeX4 (X=F, Cl, Br, I) is more stable than GeX2

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 62%
From NCERT
NEET - 2019
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Which of the following species is not stable?

1. SiCl62-

2. SiF62-

3. GeCl62-

4. SnOH62-

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 58%
From NCERT
NEET - 2019
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The basic structural unit of silicates is:

1. SiO44–

2. SiO32–

3. SiO42–

4. SiO

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 75%
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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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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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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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 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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