Name the type of the structure of silicate in which one oxygen atom of [SiO4]4- is

shared?

1. Sheet silicate

2. Pyrosilicate

3. three dimensional silicate

4. Linear chain silicate

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
 57%
NEET - 2011
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Which one of the following anions is present in chain structure silicates?

(a) Si2O76-                 (b) (Si2O52-)n

(c) (Si2O64-)n               (d) SiO44-

Subtopic:  Properties of Structure of SiO2 & Other Compounds |
From NCERT
NEET - 2007
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Borax is converted into crystalline boron by the following steps:

          BoraxXH3BO3B2O3YB

X and Y are respectively :

1. HCl, Mg                                 
2. HCl, C
3. C, Al 
4. HCl, Al

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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The dissolution of Al(OH)3 in a solution of NaOH results in the formation of -

1. AlH2O4OH2+       

2. AlH2O3OH3

3. AlH2O2OH4-     

4. AlH2O6OH3

Subtopic:  Boron Family- Preparations, Properties & Uses |
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It is because inability of ns2 electrons of the valence shell to participate in bonding that

1. Sn2+ is reducing while Pb4+ is oxidising agent

2. Sn2+ is oxidising while Pb4+ is reducing agent

3. Sn2+ and Pb2+ are both oxidising and reducing agent

4. Sn4+ is reducing while Pb4+ is oxidising agent

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 65%
NEET - 2017
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The incorrect statement among the following regarding borax is-

1. It is a useful primary standard for titrating against acids. 

2. One molecule of borax contains 4 BOB bonds.

3. Aqueous solution of borax can be used as a buffer.

4. It is made up of two triangular BO3 units and two tetrahedral BO4 units.

Subtopic:  Boron Family- Preparations, Properties & Uses |
 55%
From NCERT
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B(OH)3+NaOHNaBO2+NaBOH4+H2O

How can this reaction is made to proceed in forward direction?

(a) addition of cis1, 2 diol                   (b) addition of borax

(c) addition of trans1, 2 diol                (d) addition of Na2HPO4

 

Subtopic:  Boron Family- Preparations, Properties & Uses | Anomalous Behaviour of B & C |
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Which of the following cation can not give borax bead test?

(a) Cr3+                          (b) Co2+

(c) Ag+                           (d) Mn2+

Subtopic:  d-Block Elements- Properties & Uses |
 74%
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The species among the following that does not exist is-

1. SnF62-

2. GeCl62-

3. CCl62-

4. SiF62-

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 77%
From NCERT
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The incorrect statement regarding above reactions is :

(a) Al shows amphoteric character

(b) Gas 'P' and 'Q' are different

(d) Both X and Y are water soluble

(d) Gas Q is inflammable

 

 

Subtopic:  Boron Family- Preparations, Properties & Uses |
 58%
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