316254
The trioxides which can exist as monomeric molecule is
1 \(\mathrm{SO}_{3}\) in gaseous state
2 \(\mathrm{TeO}_{3}\)
3 \(\mathrm{SO}_{3}\) in solid state
4 \(\mathrm{SeO}_{3}\)
Explanation:
Sulphur trioxide, \(\mathrm{SO}_{3}\) in gaseous state exists as monomeric molecule.
CHXI11:THE P-BLOCK ELEMENTS
316255
How many of the following are in gaseous state at room temperature? \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}, \mathrm{O}_{3}, \mathrm{SeO}_{2}, \mathrm{TeO}_{2}}}\)
1 5
2 4
3 3
4 2
Explanation:
At room temperature, \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}}}\) and \({\mathrm{\mathrm{O}_{3}}}\) are in gaseous state while \({\mathrm{\mathrm{SeO}_{2}}}\) and \({\mathrm{\mathrm{TeO}_{2}}}\) exist as solid.
CHXI11:THE P-BLOCK ELEMENTS
316256
Assertion : \(\mathrm{SO}_{3}\) acts as a powerful oxidising agent. Reason : \(\mathrm{S}\) atom in \(\mathrm{SO}_{3}\) contains no lone pair of electrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulfur trioxide \(\left(\mathrm{SO}_{3}\right)\) is a strong oxidizing agent because of its high electron affinity, enabling it to readily accept electrons and induce oxidation reactions by extracting electrons from other substances. Sulphur atom in \(\mathrm{SO}_{3}\) has no lone pair of electron on ' \(\mathrm{S}\) ' atom. Therefore, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316257
Select the periodic property which is not regular in halogen family on moving down the group? (I) Ionization energy (II) Electron gain enthalpy (III) Size (IV) Electronegativity
1 I and II
2 I, III, and IV
3 II and IV
4 Only II
Explanation:
Electron gain enthalpy shows an irregular trend in halogens. Chlorine has higher electron gain enthalpy than fluorine. The correct order is \(\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}\)
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CHXI11:THE P-BLOCK ELEMENTS
316254
The trioxides which can exist as monomeric molecule is
1 \(\mathrm{SO}_{3}\) in gaseous state
2 \(\mathrm{TeO}_{3}\)
3 \(\mathrm{SO}_{3}\) in solid state
4 \(\mathrm{SeO}_{3}\)
Explanation:
Sulphur trioxide, \(\mathrm{SO}_{3}\) in gaseous state exists as monomeric molecule.
CHXI11:THE P-BLOCK ELEMENTS
316255
How many of the following are in gaseous state at room temperature? \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}, \mathrm{O}_{3}, \mathrm{SeO}_{2}, \mathrm{TeO}_{2}}}\)
1 5
2 4
3 3
4 2
Explanation:
At room temperature, \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}}}\) and \({\mathrm{\mathrm{O}_{3}}}\) are in gaseous state while \({\mathrm{\mathrm{SeO}_{2}}}\) and \({\mathrm{\mathrm{TeO}_{2}}}\) exist as solid.
CHXI11:THE P-BLOCK ELEMENTS
316256
Assertion : \(\mathrm{SO}_{3}\) acts as a powerful oxidising agent. Reason : \(\mathrm{S}\) atom in \(\mathrm{SO}_{3}\) contains no lone pair of electrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulfur trioxide \(\left(\mathrm{SO}_{3}\right)\) is a strong oxidizing agent because of its high electron affinity, enabling it to readily accept electrons and induce oxidation reactions by extracting electrons from other substances. Sulphur atom in \(\mathrm{SO}_{3}\) has no lone pair of electron on ' \(\mathrm{S}\) ' atom. Therefore, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316257
Select the periodic property which is not regular in halogen family on moving down the group? (I) Ionization energy (II) Electron gain enthalpy (III) Size (IV) Electronegativity
1 I and II
2 I, III, and IV
3 II and IV
4 Only II
Explanation:
Electron gain enthalpy shows an irregular trend in halogens. Chlorine has higher electron gain enthalpy than fluorine. The correct order is \(\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}\)
316254
The trioxides which can exist as monomeric molecule is
1 \(\mathrm{SO}_{3}\) in gaseous state
2 \(\mathrm{TeO}_{3}\)
3 \(\mathrm{SO}_{3}\) in solid state
4 \(\mathrm{SeO}_{3}\)
Explanation:
Sulphur trioxide, \(\mathrm{SO}_{3}\) in gaseous state exists as monomeric molecule.
CHXI11:THE P-BLOCK ELEMENTS
316255
How many of the following are in gaseous state at room temperature? \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}, \mathrm{O}_{3}, \mathrm{SeO}_{2}, \mathrm{TeO}_{2}}}\)
1 5
2 4
3 3
4 2
Explanation:
At room temperature, \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}}}\) and \({\mathrm{\mathrm{O}_{3}}}\) are in gaseous state while \({\mathrm{\mathrm{SeO}_{2}}}\) and \({\mathrm{\mathrm{TeO}_{2}}}\) exist as solid.
CHXI11:THE P-BLOCK ELEMENTS
316256
Assertion : \(\mathrm{SO}_{3}\) acts as a powerful oxidising agent. Reason : \(\mathrm{S}\) atom in \(\mathrm{SO}_{3}\) contains no lone pair of electrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulfur trioxide \(\left(\mathrm{SO}_{3}\right)\) is a strong oxidizing agent because of its high electron affinity, enabling it to readily accept electrons and induce oxidation reactions by extracting electrons from other substances. Sulphur atom in \(\mathrm{SO}_{3}\) has no lone pair of electron on ' \(\mathrm{S}\) ' atom. Therefore, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316257
Select the periodic property which is not regular in halogen family on moving down the group? (I) Ionization energy (II) Electron gain enthalpy (III) Size (IV) Electronegativity
1 I and II
2 I, III, and IV
3 II and IV
4 Only II
Explanation:
Electron gain enthalpy shows an irregular trend in halogens. Chlorine has higher electron gain enthalpy than fluorine. The correct order is \(\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}\)
316254
The trioxides which can exist as monomeric molecule is
1 \(\mathrm{SO}_{3}\) in gaseous state
2 \(\mathrm{TeO}_{3}\)
3 \(\mathrm{SO}_{3}\) in solid state
4 \(\mathrm{SeO}_{3}\)
Explanation:
Sulphur trioxide, \(\mathrm{SO}_{3}\) in gaseous state exists as monomeric molecule.
CHXI11:THE P-BLOCK ELEMENTS
316255
How many of the following are in gaseous state at room temperature? \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}, \mathrm{O}_{3}, \mathrm{SeO}_{2}, \mathrm{TeO}_{2}}}\)
1 5
2 4
3 3
4 2
Explanation:
At room temperature, \({\mathrm{\mathrm{SO}_{2}, \mathrm{SO}_{3}}}\) and \({\mathrm{\mathrm{O}_{3}}}\) are in gaseous state while \({\mathrm{\mathrm{SeO}_{2}}}\) and \({\mathrm{\mathrm{TeO}_{2}}}\) exist as solid.
CHXI11:THE P-BLOCK ELEMENTS
316256
Assertion : \(\mathrm{SO}_{3}\) acts as a powerful oxidising agent. Reason : \(\mathrm{S}\) atom in \(\mathrm{SO}_{3}\) contains no lone pair of electrons.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
Explanation:
Sulfur trioxide \(\left(\mathrm{SO}_{3}\right)\) is a strong oxidizing agent because of its high electron affinity, enabling it to readily accept electrons and induce oxidation reactions by extracting electrons from other substances. Sulphur atom in \(\mathrm{SO}_{3}\) has no lone pair of electron on ' \(\mathrm{S}\) ' atom. Therefore, option (2) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316257
Select the periodic property which is not regular in halogen family on moving down the group? (I) Ionization energy (II) Electron gain enthalpy (III) Size (IV) Electronegativity
1 I and II
2 I, III, and IV
3 II and IV
4 Only II
Explanation:
Electron gain enthalpy shows an irregular trend in halogens. Chlorine has higher electron gain enthalpy than fluorine. The correct order is \(\mathrm{Cl}>\mathrm{F}>\mathrm{Br}>\mathrm{I}\)