Tin cry refers to- 

1. Conversion of white to grey tin

2. Tin plating

3. Conversion of white tetrahedral tin to white rhombohedral tin

4. Emission of sound while bending a tin rod

Subtopic:  Carbon Family - Preparations, Properties & Uses |
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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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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 |
 81%
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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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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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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Silicate, among the following, has only one oxygen atom of \([SiO_4]^{4-}\) shared with the next unit:
1. Sheet silicate 2. Pyrosilicate
3. Three dimensional silicate 4. Linear chain silicate
Subtopic:  Carbon Family - Preparations, Properties & Uses |
 60%
From NCERT
AIPMT - 2011
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The stability of the +1 oxidation state increases in the sequence:

1. Al <Ga<In<Tl

2. Tl<In<Ga<Al

3. In<Tl<Ga<Al

4. Ga<In<Al<Tl

Subtopic:  Boron Family- Preparations, Properties & Uses |
 92%
From NCERT
AIPMT - 2009
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