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Q. No.What is the correct order of melting points for hydrides in Group 16?
1. \(H_2S<H_2Se<H_2Te<H_2O\)
2. \(H_2O<H_2S<H_2Se<H_2Te\)
3. \(H_2S<H_2Te<H_2Se<H_2O\)
4. \(H_2Se<H_2S<H_2Te<H_2O\)
Subtopic: Group 16 - Preparation, Properties & Uses |
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Given below are two statements:
| Statement I: | The pentavalent oxide of group \(15\) element, \(\mathrm{E_2O_5,}\) is less acidic than the trivalent oxide, \(\mathrm{E_2O_3,}\) of the same element. |
| Statement II: | The acidic character of trivalent oxide of group \(15\) elements, \(\mathrm{E_2O_3,}\) decreases down the group. |
| 1. | Statement I is incorrect and Statement II is correct. |
| 2. | Both Statement I and Statement II are correct. |
| 3. | Both Statement I and Statement II are incorrect. |
| 4. | Statement I is correct and Statement II is incorrect. |
Subtopic: Group 15 - Preparation, Properties & Uses |
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Which of the following sets represents elements of the chalcogen group?
1. \(O,~Ti\) and \(Po\)
2. \(Se, ~Te\) and \(Po\)
3. \(Se,~ Tb\) and \(Pu\)
4. \(S, ~Te\) and \(Pm\)
1. \(O,~Ti\) and \(Po\)
2. \(Se, ~Te\) and \(Po\)
3. \(Se,~ Tb\) and \(Pu\)
4. \(S, ~Te\) and \(Pm\)
Subtopic: Group 16 - Preparation, Properties & Uses |
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How many interhalogens among those given below have a square pyramidal structure?
\(\mathrm{ClF}_3, \mathrm{IF}_7, \mathrm{BrF}_5, \mathrm{BrF}_3, \mathrm{I}_2 \mathrm{Cl}_6, \mathrm{IF}_5, \mathrm{CIF}, \mathrm{ClF}_5\)
\(\mathrm{ClF}_3, \mathrm{IF}_7, \mathrm{BrF}_5, \mathrm{BrF}_3, \mathrm{I}_2 \mathrm{Cl}_6, \mathrm{IF}_5, \mathrm{CIF}, \mathrm{ClF}_5\)
| 1. | 3 | 2. | 5 |
| 3. | 2 | 4. | 4 |
Subtopic: Group 17 - Preparation, Properties & Uses |
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The large difference between the melting and boiling points of oxygen and sulphur may be explained based on:
1. Atomic size
2. Atomicity
3. Electronegativity
4. Electron gain enthalpy
1. Atomic size
2. Atomicity
3. Electronegativity
4. Electron gain enthalpy
Subtopic: Group 16 - Preparation, Properties & Uses |
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Consider the given two statements:
Options:
| Assertion (A): | \(\mathrm{NH}_3\) is more polar than \(\mathrm{NF}_3 .\) |
| Reason (R): | The N – H dipole is directed towards N while in the case of \(\mathrm{NF}_3 \), towards F, as F is more electronegative. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation for (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation for (A). |
| 3. | (A) is True but (R) is False. |
| 4. | (A) is False but (R) is True |
Subtopic: Group 15 - Preparation, Properties & Uses |
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Chloride salt of M is treated with excess of AgNO3. It forms curdy white precipitate ‘A’. When ‘A’ is treated with NH4OH, it forms a soluble salt ‘B’. The A and B respectively are:
1. AgCl, [Ag(NH3)2]+
2. AgBr, [Ag(OH)2]−
3. AgCl, [Ag(OH)4]2−
4. AgBr, [Ag(OH)4]2−
1. AgCl, [Ag(NH3)2]+
2. AgBr, [Ag(OH)2]−
3. AgCl, [Ag(OH)4]2−
4. AgBr, [Ag(OH)4]2−
Subtopic: Group 15 - Preparation, Properties & Uses |
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Consider the following condition,
(i). X: Oxidation number of Br in bromic acid.
(ii). Y: Oxidation number of Br in perbromic acid.
The value of (X+Y) is:
1. 10
2. -1
3. 12
4. 8
(i). X: Oxidation number of Br in bromic acid.
(ii). Y: Oxidation number of Br in perbromic acid.
The value of (X+Y) is:
1. 10
2. -1
3. 12
4. 8
Subtopic: Group 17 - Preparation, Properties & Uses |
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| Statement I: | Chlorine easily forms oxides and the compounds are explosive. |
| Statement II: | The higher oxidation states of chlorine, bromine, and iodine are released when halogens form oxides and fluorides. |
| 1. | Statement I is correct but Statement II is incorrect. |
| 2. | Statement I is incorrect but Statement II is correct. |
| 3. | Both Statement I and Statement II are correct. |
| 4. | Both Statement I and Statement II are incorrect. |
Subtopic: Group 17 - Preparation, Properties & Uses |
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Subtopic: Group 15 - Preparation, Properties & Uses |
Level 3: 35%-60%
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