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One or More than One Options Correct Type
Direction (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.
Q. Identify the pairs in which one covalent radii of elements are almost similar.
- a)Nb and Ta
- b)Mo and W
- c)La and Lu
- d)Sc and Y
Correct answer is option 'A,B'. Can you explain this answer?
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One or More than One Options Correct TypeDirection (Q. Nos. 11-15) Thi...
Covalent radii tend to increase across a period from left to right and increase down a group in the periodic table. Elements that are close to each other in the periodic table are likely to have similar covalent radii.
Let's analyze each pair:
Nb (Niobium) and Ta (Tantalum):
- Nb: Atomic number 41, Period 5, Group 5.
- Ta: Atomic number 73, Period 6, Group 5.
- These elements are in the same group and have similar atomic sizes. Therefore, their covalent radii are expected to be similar. (Correct)
Mo (Molybdenum) and W (Tungsten):
- Mo: Atomic number 42, Period 5, Group 6.
- W: Atomic number 74, Period 6, Group 6.
- Similar reasoning as Nb and Ta, they are in the same group and likely have similar covalent radii. (Correct)
La (Lanthanum) and Lu (Lutetium):
- La: Atomic number 57, Period 6, Group 3.
- Lu: Atomic number 71, Period 6, Group 3.
- These elements are in the same group but not directly next to each other in the periodic table. Their covalent radii may be similar but not as closely as within the same period or adjacent groups.
Sc (Scandium) and Y (Yttrium):
- Sc: Atomic number 21, Period 4, Group 3.
- Y: Atomic number 39, Period 5, Group 3.
- These elements are in the same group but not in the same period. Their covalent radii may show some similarity due to being in the same group.
Based on the analysis:
- Option 1 (Nb and Ta) and Option 2 (Mo and W) are correct because these pairs are in the same group and are expected to have similar covalent radii.
Therefore, the correct answers are:
1. Nb and Ta
2. Mo and W
Most Upvoted Answer
One or More than One Options Correct TypeDirection (Q. Nos. 11-15) Thi...
Covalent Radii of Elements
Covalent radius is defined as half of the distance between the nuclei of two identical atoms that are bonded together by a covalent bond. It is an important parameter in determining the size of atoms.
Similar Covalent Radii:
In this question, we are required to identify the pairs of elements that have similar covalent radii. Let's analyze each option:
a) Nb and Ta:
Niobium (Nb) and Tantalum (Ta) belong to the same group (Group 5) of the periodic table. As we move down the group, the atomic size generally increases due to the addition of new energy levels. Therefore, the covalent radii of Nb and Ta are expected to be similar. Hence, option (a) is correct.
b) Mo and W:
Molybdenum (Mo) and Tungsten (W) belong to the same group (Group 6) of the periodic table. Similar to the previous case, as we move down the group, the atomic size increases. Therefore, the covalent radii of Mo and W are expected to be similar. Hence, option (b) is correct.
c) La and Lu:
Lanthanum (La) and Lutetium (Lu) do not belong to the same group. Lanthanum is in Group 3, while Lutetium is in Group 17. As we move across a period, the atomic size generally decreases due to the increasing nuclear charge. Therefore, the covalent radii of La and Lu are not expected to be similar. Hence, option (c) is incorrect.
d) Sc and Y:
Scandium (Sc) and Yttrium (Y) also do not belong to the same group. Scandium is in Group 3, while Yttrium is in Group 5. As mentioned before, as we move across a period, the atomic size generally decreases. Therefore, the covalent radii of Sc and Y are not expected to be similar. Hence, option (d) is incorrect.
Conclusion:
From our analysis, we can conclude that options (a) and (b) are correct. The pairs of elements that have almost similar covalent radii are Nb and Ta, and Mo and W.
Covalent radius is defined as half of the distance between the nuclei of two identical atoms that are bonded together by a covalent bond. It is an important parameter in determining the size of atoms.
Similar Covalent Radii:
In this question, we are required to identify the pairs of elements that have similar covalent radii. Let's analyze each option:
a) Nb and Ta:
Niobium (Nb) and Tantalum (Ta) belong to the same group (Group 5) of the periodic table. As we move down the group, the atomic size generally increases due to the addition of new energy levels. Therefore, the covalent radii of Nb and Ta are expected to be similar. Hence, option (a) is correct.
b) Mo and W:
Molybdenum (Mo) and Tungsten (W) belong to the same group (Group 6) of the periodic table. Similar to the previous case, as we move down the group, the atomic size increases. Therefore, the covalent radii of Mo and W are expected to be similar. Hence, option (b) is correct.
c) La and Lu:
Lanthanum (La) and Lutetium (Lu) do not belong to the same group. Lanthanum is in Group 3, while Lutetium is in Group 17. As we move across a period, the atomic size generally decreases due to the increasing nuclear charge. Therefore, the covalent radii of La and Lu are not expected to be similar. Hence, option (c) is incorrect.
d) Sc and Y:
Scandium (Sc) and Yttrium (Y) also do not belong to the same group. Scandium is in Group 3, while Yttrium is in Group 5. As mentioned before, as we move across a period, the atomic size generally decreases. Therefore, the covalent radii of Sc and Y are not expected to be similar. Hence, option (d) is incorrect.
Conclusion:
From our analysis, we can conclude that options (a) and (b) are correct. The pairs of elements that have almost similar covalent radii are Nb and Ta, and Mo and W.
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One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer?
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One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer?.
One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer?.
Solutions for One or More than One Options Correct TypeDirection (Q. Nos. 11-15) This section contains 5 multiple choice questions. Each question has four choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.Q.Identify the pairs in which one covalent radii of elements are almost similar.a)Nband Tab)Mo and Wc)La and Lud)Sc and YCorrect answer is option 'A,B'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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