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Q. No.The correct option for the increasing order of 1st ionization enthalpy:\(Pb, Sn, Ge, Si \) is:
1.
\(Pb < Sn < Ge < Si \)
2.
\(Sn < Pb < Si < Ge \)
3.
\(Sn < Pb < Ge < Si\)
4.
\( Pb <Sn < Si < Ge \)
Subtopic: Carbon Family - Preparations, Properties & Uses |
58%
Level 3: 35%-60%
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Choose the correct set of elements X, Y, and Z, which belong to groups 13, 14, and 15, respectively, from the options below.
1. X = Th, Y = Pb, Z= Bi
2. X = In, Y = Sn, Z= At
3. X = Th, Y = Sn, Z= Sb
4. X = Tl, Y = Pb, Z= Bi
Subtopic: Boron Family- Preparations, Properties & Uses | Carbon Family - Preparations, Properties & Uses |
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Level 2: 60%+
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The element among the following that forms dioxide and evolves
hydrogen on treatment with steam is:
1. C
2. Si
3. Sn
4. Pb
hydrogen on treatment with steam is:
1. C
2. Si
3. Sn
4. Pb
Subtopic: Carbon Family - Preparations, Properties & Uses |
Level 3: 35%-60%
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Arrange 1st ionization enthalpy of group 13 elements in increasing order:
\((Tl , In, Ga, Al) \)
\((Tl , In, Ga, Al) \)
| 1. | \(Tl < In < Ga < Al \) |
| 2. | \(In < Ga < Al < Tl \) |
| 3. | \( In < Al < Ga < Tl \) |
| 4. | \(Tl < In < Al < Ga \) |
Subtopic: Boron Family- Preparations, Properties & Uses |
64%
Level 2: 60%+
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Given below are two statements:
| Statement I: | In group 14, a significant increase in covalent radius is observed from carbon to silicon and thereafter, a small increase in covalent radius is observed from silicon to germanium. |
| Statement II: | A considerable difference in the values of electronegativity from silicon to lead is observed. |
| 1. | Both Statement I and Statement II are correct. |
| 2. | Both Statement I and Statement II are incorrect. |
| 3. | Statement I is correct but Statement II is incorrect. |
| 4. | Statement I is incorrect but Statement II is correct. |
Subtopic: Carbon Family - Preparations, Properties & Uses |
Level 3: 35%-60%
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| Assertion (A): | Melting point of gallium is lesser than aluminum. |
| Reason (R): | Due to the inert pair effect, increased effective nuclear charge holds ns-electrons tightly. |
| 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: Boron Family- Preparations, Properties & Uses |
Level 3: 35%-60%
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Consider the given two statements:
Options:
| Assertion (A): | Sn4+ ion is more stable than Sn+2. |
| Reason (R): | The inert pair effect dominates down the groups. |
| 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: Carbon Family - Preparations, Properties & Uses |
Level 3: 35%-60%
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| Assertion (A): | In C60 fullerene 12, five-membered rings and 20, six-membered rings are present. |
| Reason (R): | All the C–C distances are equal in C60 fullerene. |
| 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: Structure & Properties of Allotropes of C |
Level 3: 35%-60%
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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 |
Level 3: 35%-60%
Hints
| Assertion (A): | Carbon forms two oxides \(CO\) and \(CO_2\) where \(CO\) is neutral whereas \(CO_2\) is acidic. |
| Reason (R): | \(CO_2\) will combine with water to give carbonic acid and \(CO\) is soluble in water. |
| 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: Compounds of Carbon, Preparations, Properties & Uses |
Level 3: 35%-60%
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