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Q. No.Given below are two statements:
| Assertion (A): | [SiF6]2– is known whereas [SiCl6]2– is not. |
| Reason (R): | Cl atom causes higher steric hindrance. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
87%
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Given below are two statements:
| Assertion (A): | Boric acid is considered a weak acid. |
| Reason (R): | Boric acid is not able to release H+ ions on its own. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Compounds of Boron- Preparations, Properties & Uses |
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Consider the following statements
| (i). | Carbon form the most acidic dioxide among the oxide of group 14. |
| (ii). | Pb mostly found in the +2 oxidation state. |
| (iii). | Only silicon used as a semiconductor. |
Identify the correct statement(s):
1. Only iii
2. i, ii
3. ii, iii
4. Only ii
Subtopic: Carbon Family - Preparations, Properties & Uses |
82%
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The correct statements among I to III regarding group 13 element oxides are:
(I) Boron trioxide or diboron trioxide is acidic.
(II) Oxides of aluminium and gallium are amphoteric.
(III) Oxides of indium and thallium are basic.
1. (I) and (II) only
2. (I) and (III) only
3. (II) and (III) only
4. (I), (II), and (III) only
Subtopic: Boron Family- Preparations, Properties & Uses |
84%
From NCERT
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| Assertion (A): | Silicones are hydrophobic in nature. |
| Reason (R): | Si–O–Si linkages are moisture sensitive. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
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| Assertion (A): | SnO is more reactive towards acid than SnO2. |
| Reason (R): | Both SnO and SnO2 are amphoteric oxides. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | (A) is false but (R) is true. |
Subtopic: Properties of Glass, Pb & Sn compounds |
58%
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Consider the given statements:
| Statement I: | Both carbon and silicon atoms belong to group 14. Both CO2 and SiO2 are gases and linear molecules. |
| Statement II: | Being electron deficient due to an incomplete octet of the central atom, both BCl3 and AlCl3 behave as Lewis acids. |
| 1. | Statement I is correct; Statement II is correct. |
| 2. | Statement I is incorrect; Statement II is incorrect. |
| 3. | Statement I is correct; Statement II is incorrect. |
| 4. | Statement I is incorrect; Statement II is correct. |
Subtopic: Boron Family- Preparations, Properties & Uses | Properties of Structure of SiO2 & Other Compounds |
52%
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Incorrect statements among the following are:
1. B and E only
2. B, C and E only
3. A and D only
4. B and D only
| A. | BeSO4 and MgSO4 are insoluble in water. |
| B. | Magnesium is the central metal atom in chlorophyll. |
| C. | Pb4+ acts as an oxidizing agent. |
| D. | The study of only emission, not absorption spectra is referred to as spectroscopy. |
| E. | Diborane is prepared by treating BF3 with LiAlH4 |
1. B and E only
2. B, C and E only
3. A and D only
4. B and D only
Subtopic: Compounds of Boron- Preparations, Properties & Uses | Properties of Glass, Pb & Sn compounds |
59%
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Consider the given two statements:
| Assertion (A): | CCl4 is insoluble in water while SiCl4 is soluble in water. |
| Reason (R): | Si in SiCl4 can accommodate the lone pair of electrons in d-orbitals obtained from the oxygen atom of water molecules. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True. |
Subtopic: Properties of Structure of SiO2 & Other Compounds |
87%
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One group of elements in the periodic table contains, in descending order, boron, aluminium, gallium, indium, and thallium. Which of the following are correct about these elements?
| a. | Indium forms the oxide In2O3 |
| b. | Boron is the least reactive element in the group |
| c. | Gallium forms the sulphate GaSO4 |
1. a only
2. a and b
3. a and c
4. b and c
Subtopic: Boron Family- Preparations, Properties & Uses |
58%
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