The electron-deficient compound among the following is -
1.
2.
3.
4.
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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.
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The correct statement(s) among the following options is/are:
1. | Aluminium alloys are used to make aircraft bodies. |
2. | Aluminium utensils should not be kept in water overnight. |
3. | Aluminium wire is used to make transmission cables. |
4. | All of the above |
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The correct statement(s) regarding diborane and boric acid is/are-
1. Diborane has two 3c-2e- bonds.
2. Boric acid has a layered structure.
3. Four 2c-2e- bonds are present in diborane.
4. All of the above
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Assertion: B-X bond length in is shorter than the expected value.
Reason: back bonding occurs between B and X.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
BCl3 has higher stability than , 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 |
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Despite the dipole moment in the B–Cl bond, the BCl3 molecule as a whole has no 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 |
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A compound X, of boron, reacts with on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating with Lithium aluminium hydride. The compounds X and Y are represented by the formulas -
1. | \(\mathrm{B}_2 \mathrm{H}_6, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 2. | \(\mathrm{B}_2 \mathrm{O}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) |
3. | \(\mathrm{BF}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 4. | \(\mathrm{B}_3 \mathrm{~N}_3 \mathrm{H}_6, \mathrm{~B}_2 \mathrm{H}_6\) |
An anion that cannot be formed by Boron is -
1.
2.
3.
4.
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Boric acid is a-
1. Protic acid.
2. Weak monobasic acid.
3. Lewis acid.
4. Both '2' and '3'
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