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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The correct statement among the following regarding behavior of BCI3 and CCI4 in water is -

1. BCI3 readily undergoes hydrolysis while CCI4 completely resists hydrolysis.

2. CCI4  readily undergoes hydrolysis while BCI3 completely resists hydrolysis.

3. Both BCI3 and CCI4 readily undergo hydrolysis.

4. Neither BCI3 nor CCI4 undergo hydrolysis.

Subtopic:  Compounds of Carbon, 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 hybridization of carbon in (a) CO32- (b) diamond (c) graphite is respectively-

1. sp2sp3sp2

2. sp2sp3sp3

3. sp3sp3sp2

4. sp3sp2sp3

Subtopic:  Compounds of Carbon, 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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CO is a poisonous gas because -

1. It forms a complex with hemoglobin.

2. The CO–Hb complex is about 300 times more stable than the O2–Hb complex.

3. It can kill a person through suffocation on not receiving oxygen.

4. All of the above

Subtopic:  Compounds of Carbon, Preparations, Properties & Uses |
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