Select the correct statement(s) regarding the following reaction sequence:

 
   

1.  The compound (A) is CH32SiCl2

2.  The compound D is SiC

3.  The compound (B) is CH32SiOH2

4.  All of the above

Subtopic:  Carbon Family - Preparations, Properties & Uses |
 88%
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The number of double bonds at alternate position in C60 molecule are

1.  20

2.  25

3.  30

4.  36

Subtopic:   Structure & Properties of Allotropes of C |
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Incorrect statement among the following is

1.  BnHn+6 are known as arachnoboranes

2.  Indium hydride is a polymeric solid

3.  AlH3 is a monomeric planar molecule

4.  Nido-boranes have the general formula BnHn+6

Subtopic:  Anomalous Behaviour of B & C |
 52%
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A species among the following that decomposes easily is: -

1. \(\mathrm{Pbl}_2 \) 2. \(\mathrm{Pbl}_4 \)
3. \(\mathrm{PbCH}_3 \mathrm{COO}_4 \) 4. \(\mathrm{PbCl}_2\)
Subtopic:  Properties of Glass, Pb & Sn compounds |
 71%
From NCERT
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A strong oxidizing agent among the following is -

1.  Tl3+

2.  Ga3+

3.  ln3+

4.  Al3+

Subtopic:  Boron Family- Preparations, Properties & Uses |
 76%
From NCERT
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From the following, the compound(s) that react(s) with \(\mathrm{BF}_3\) is/are -

1. Ethers 2. \( \mathrm{H}_2 \mathrm{O} \)
3. \(\mathrm{NH}_3 \) 4. All of the above
Subtopic:  Boron Family- Preparations, Properties & Uses |
 79%
From NCERT
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Which of the following statement is incorrect regarding B-F bond in BF3?

1.  All the three B-F bond lengths are equal and each of them is shorter than the sum of the covalent radii of boron and fluorine

2.  The bond energy of the B-F bond is very high, higher than for any other single bond

3.  The unusual shortness and strength of the B-F bond may be explained by pπ-pπ interaction between boron and fluorine atoms

4.  The unusual shortness and strength of the bonds may be explained by a pπ-dπ interaction between boron and fluorine atoms

Subtopic:  Boron Family- Preparations, Properties & Uses |
 62%
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Under hydrolytic conditions, the compounds used for the preparation of the linear polymer and for chain termination, respectively, are

1.  CH3SiCl3 and SiCH34

2.  CH32SiCl2 and CH33SiCl

3.  CH32SiCl2 and CH3SiCl3

4.  SiC4 and CH33SiCl

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
 79%
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Na2B4O710H2O 740C 2NaBO2+(X)+10H2O
(X)+CaF2+H2SO4Y+CaSO4+H2O
(Y)+NaBH4(Z)+NaBF4

Select the incorrect statement regarding compounds (X), (Y) and (Z).

1.  Compound (X) is B2O3 and compound (Z) contains two 3C - 2e bonds

2.  Compound (X) is B2O3 and compound (Y) contains one 3C - 2e bonds 

3.  Compound (Y) is Lewis acid and stable due to pπ-pπ back bonding

4.  Compound (Z) reacts with excess of NH3 at high temperature gives inorganic graphite 

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Which element does not form alum?

1.  Fe

2.  Li

3.  K

4.  Al

Subtopic:  Boron Family- Preparations, Properties & Uses |
 66%
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