BCl has higher stability than TlCl3, because -

1. The +2 oxidation state of Tl is more stable than the +2 oxidation state of B

2. The +2 oxidation state of B is more stable than the +2 oxidation state of Tl

3. The +3 oxidation state of B is more stable than the +3 oxidation state of Tl

4. The +3 oxidation state of Tl is more stable than the +3 oxidation state of B

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Boron trifluoride behaves as a Lewis acid because -

1. Boron trifluoride is electron-rich.

2. Boron trifluoride is electron-deficient.

3. Boron trifluoride is highly stable.

4. None of these.

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Boric acid is a-

1. Protic acid.

2. Weak monobasic acid.

3. Lewis acid.

4. Both '2' and '3'

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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The effect of heating Boric acid at 370 K or above is -

1. Orthoboric acid changes to metaboric acid

2. Metaboric acid changes to boric oxide

3. Both '1' and '2'

4. Neither '1' nor '2'

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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The electron-deficient compound among the following is -

1. SiCl4

2. BCl3

3. PCl3

4. ICl

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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The B–F bond lengths in BF3 (130 pm) and BF4-(143 pm) differ because of-

1. Presence of triple bond character in BF3

2. Resonance in BF4-

3. Presence of a double bond character in BF3

4. Presence of a double bond character in BF4-

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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B–Cl bond has a dipole moment. Still, the BCl3 molecule has zero dipole moment because-

1. The respective dipole-moments of the B–Cl bond add with each other

2. The respective dipole-moments of the B–Cl bond cancel each other

3. BCl3 is tetrahedral in shape

4.  None of the above

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Amphoteric oxides are:

1. Tl2O3SiO2

2. CO2B2O3

3. B2O3SiO2

4. AI2O3PbO2

Subtopic:  Compounds of Boron- Preparations, Properties & Uses | Carbon Family - Preparations, Properties & Uses |
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An aqueous solution of Borax is-

1. Neutral

2. Amphoteric

3. Basic

4. Acidic

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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Boric acid is polymeric due to-

1. Its acidic nature.

2. The presence of hydrogen bonds.

3. Its monobasic nature.

4. Its geometry.

Subtopic:  Compounds of Boron- Preparations, Properties & Uses |
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