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Q. No.Subtopic: Properties of Glass, Pb & Sn compounds |
87%
Level 1: 80%+
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Which of the following statement is correct?
1. Boron and aluminium halides behave as Lewis acids
2. Al forms \([AlF_6]^{3-}\) ion but B does not form \(\left[\mathrm{BF}_6\right]^{3-}\)ion.
3. The \(p\pi-p\pi\) back bonding occurs in the halides of boron and not in those of aluminium.
4. All of these
1. Boron and aluminium halides behave as Lewis acids
2. Al forms \([AlF_6]^{3-}\) ion but B does not form \(\left[\mathrm{BF}_6\right]^{3-}\)ion.
3. The \(p\pi-p\pi\) back bonding occurs in the halides of boron and not in those of aluminium.
4. All of these
Subtopic: Boron Family- Preparations, Properties & Uses |
88%
Level 1: 80%+
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White fumes appear around the bottle of anhydrous \(AlCl_3\) due to :
1. Decomposition of \(AlCl_3\)
2. Hydrolysis of \(AlCl_3\) liberating \(H_2\) gas
3. Hydrolysis of \(AlCl_3\) liberating \(Cl_2\) gas
4. Hydrolysis of \(AlCl_3\) liberating \(HCl\) gas
1. Decomposition of \(AlCl_3\)
2. Hydrolysis of \(AlCl_3\) liberating \(H_2\) gas
3. Hydrolysis of \(AlCl_3\) liberating \(Cl_2\) gas
4. Hydrolysis of \(AlCl_3\) liberating \(HCl\) gas
Subtopic: Boron Family- Preparations, Properties & Uses |
70%
Level 2: 60%+
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When \(SiCl_4\) is allowed to undergo hydrolysis it gives:
1. \(SiO_2-\) Silica
2. \(Si(OH)_4-\) Silicic acid
3. \(Si(OH)Cl_3-\) Trichlorosilanol
4. \(SiCl_4\) do not undergo hydrolysis
1. \(SiO_2-\) Silica
2. \(Si(OH)_4-\) Silicic acid
3. \(Si(OH)Cl_3-\) Trichlorosilanol
4. \(SiCl_4\) do not undergo hydrolysis
Subtopic: Properties of Structure of SiO2 & Other Compounds |
78%
Level 2: 60%+
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Hydrolysis of dimethyldichloro silane; \((Ch_3)_2SiCl_2\) followed by condensation polymerisation yields straight chain polymer of:
1.
2.
3.
4.
1.
2.
3.
4.
Subtopic: Properties of Structure of SiO2 & Other Compounds |
74%
Level 2: 60%+
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Subtopic: Compounds of Carbon, Preparations, Properties & Uses |
68%
Level 2: 60%+
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Which one of the following is the correct statement?
1. The hydroxide of boron is basic in nature.
2. The hydroxide of boron is neutral in nature.
3. The hydroxide of boron is acidic in nature.
4. Boron shows maximum oxidation state of \(+1 \) due to inert pair effect.
1. The hydroxide of boron is basic in nature.
2. The hydroxide of boron is neutral in nature.
3. The hydroxide of boron is acidic in nature.
4. Boron shows maximum oxidation state of \(+1 \) due to inert pair effect.
Subtopic: Boron Family- Preparations, Properties & Uses |
72%
Level 2: 60%+
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Given below are two statements:
| Statement-I : | Stability of +1 oxidation state increases as Ga< In < Tl |
| Statement-II : | Stability of +1 oxidation state increases down the group due to inert pair effect. |
| 1. | Statement-I and Statement-II both are correct |
| 2. | Statement-I and Statement-II both are incorrect |
| 3. | Statement-I is correct and Statement-II is incorrect |
| 4. | Statement I is incorrect and Statement-II is correct |
Subtopic: Boron Family- Preparations, Properties & Uses |
94%
Level 1: 80%+
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Given below are two statements:
| Statement I: | Pb⁴⁺ compounds are stronger oxidizing agents than Sn⁴⁺ compounds. |
| Statement II: | The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to ‘inert pair effect’. |
| 1. | Both the statements are True, and Statement II is the correct explanation for Statement I |
| 2. | Both the statements are True, but Statement II is not the correct explanation for Statement I |
| 3. | Statement I is True, but Statement II is False. |
| 4. | Statement I is False, and Statement II is True. |
Subtopic: Carbon Family - Preparations, Properties & Uses |
68%
Level 2: 60%+
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This question contains STATEMENT-1 (Assertion/ Statement ) and STATEMENT-2 (Reason/Explanation) and has 4 choices (a), (b), (c) and (d) out of which ONLY ONE is correct.
| Statement-1: | \(\mathrm{Pb}^{+4}\) compounds are stronger oxidising agents than \(\mathrm{Sn}^{4+}\) compounds |
| Statement-2: | The higher oxidation states for the group 14 elements are more stable for the heavier members of the group due to 'inert pair effect'. |
| 1. | Statement-1 is True, Statement-2 is True; Statement-2 is a correct explanation for Statement-1 |
| 2. | Statement-1 is True, Statement-2 is True; Statement-2 is NOT a correct explanation for Statement-1 |
| 3. | Statement-1 is True, Statement-2 is False |
| 4. | Statement-1 is False, Statement-2 is True. |
Subtopic: Carbon Family - Preparations, Properties & Uses |
84%
Level 1: 80%+
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