316543
Assertion : Nitrogen has higher ionization energy than that of oxygen. Reason : Nitrogen has smaller atomic size than that of oxygen.
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:
Nitrogen has highy stable half filled \(\mathrm{p}\) orbital. Thus, it has more ionization energy. Oxygen has smaller atomic size than nitrogen due to its stronger nuclear charge.Therefore, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316544
Which among the group- 15 elements does not exists as tetra atomic molecule?
1 Nitrogen
2 Phosphorus
3 Arsenic
4 Antimony
Explanation:
Nitrogen due to smaller size, high ionisation energy high electronegativity and the absence of d-orbital does not exist as a tetra atomic molecule. Nitrogen cannot form \(\mathrm{d} \pi-\mathrm{p} \pi\) bond due to absence of d-orbital, so it cannot expand its covalency beyond four as the heavier members of this group can.
CHXI11:THE P-BLOCK ELEMENTS
316545
What is the number of allotropes of selenium?
1 2
2 4
3 5
4 6
Explanation:
Selenium exists in two allotropic forms, red (non - metallic) and grey (metallic).
MHTCET - 2021
CHXI11:THE P-BLOCK ELEMENTS
316546
Which of the following elements does not show allotropy?
316543
Assertion : Nitrogen has higher ionization energy than that of oxygen. Reason : Nitrogen has smaller atomic size than that of oxygen.
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:
Nitrogen has highy stable half filled \(\mathrm{p}\) orbital. Thus, it has more ionization energy. Oxygen has smaller atomic size than nitrogen due to its stronger nuclear charge.Therefore, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316544
Which among the group- 15 elements does not exists as tetra atomic molecule?
1 Nitrogen
2 Phosphorus
3 Arsenic
4 Antimony
Explanation:
Nitrogen due to smaller size, high ionisation energy high electronegativity and the absence of d-orbital does not exist as a tetra atomic molecule. Nitrogen cannot form \(\mathrm{d} \pi-\mathrm{p} \pi\) bond due to absence of d-orbital, so it cannot expand its covalency beyond four as the heavier members of this group can.
CHXI11:THE P-BLOCK ELEMENTS
316545
What is the number of allotropes of selenium?
1 2
2 4
3 5
4 6
Explanation:
Selenium exists in two allotropic forms, red (non - metallic) and grey (metallic).
MHTCET - 2021
CHXI11:THE P-BLOCK ELEMENTS
316546
Which of the following elements does not show allotropy?
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CHXI11:THE P-BLOCK ELEMENTS
316543
Assertion : Nitrogen has higher ionization energy than that of oxygen. Reason : Nitrogen has smaller atomic size than that of oxygen.
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:
Nitrogen has highy stable half filled \(\mathrm{p}\) orbital. Thus, it has more ionization energy. Oxygen has smaller atomic size than nitrogen due to its stronger nuclear charge.Therefore, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316544
Which among the group- 15 elements does not exists as tetra atomic molecule?
1 Nitrogen
2 Phosphorus
3 Arsenic
4 Antimony
Explanation:
Nitrogen due to smaller size, high ionisation energy high electronegativity and the absence of d-orbital does not exist as a tetra atomic molecule. Nitrogen cannot form \(\mathrm{d} \pi-\mathrm{p} \pi\) bond due to absence of d-orbital, so it cannot expand its covalency beyond four as the heavier members of this group can.
CHXI11:THE P-BLOCK ELEMENTS
316545
What is the number of allotropes of selenium?
1 2
2 4
3 5
4 6
Explanation:
Selenium exists in two allotropic forms, red (non - metallic) and grey (metallic).
MHTCET - 2021
CHXI11:THE P-BLOCK ELEMENTS
316546
Which of the following elements does not show allotropy?
316543
Assertion : Nitrogen has higher ionization energy than that of oxygen. Reason : Nitrogen has smaller atomic size than that of oxygen.
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:
Nitrogen has highy stable half filled \(\mathrm{p}\) orbital. Thus, it has more ionization energy. Oxygen has smaller atomic size than nitrogen due to its stronger nuclear charge.Therefore, option (3) is correct.
CHXI11:THE P-BLOCK ELEMENTS
316544
Which among the group- 15 elements does not exists as tetra atomic molecule?
1 Nitrogen
2 Phosphorus
3 Arsenic
4 Antimony
Explanation:
Nitrogen due to smaller size, high ionisation energy high electronegativity and the absence of d-orbital does not exist as a tetra atomic molecule. Nitrogen cannot form \(\mathrm{d} \pi-\mathrm{p} \pi\) bond due to absence of d-orbital, so it cannot expand its covalency beyond four as the heavier members of this group can.
CHXI11:THE P-BLOCK ELEMENTS
316545
What is the number of allotropes of selenium?
1 2
2 4
3 5
4 6
Explanation:
Selenium exists in two allotropic forms, red (non - metallic) and grey (metallic).
MHTCET - 2021
CHXI11:THE P-BLOCK ELEMENTS
316546
Which of the following elements does not show allotropy?