- 1(current)
Q. No.Consider the following curve:
X represents group with highest atomic radius. The element that belongs to Y group can be :
| 1. | Na | 2. | Mg |
| 3. | Br | 4. | Si |
Subtopic: Â Atomic Size |
 51%
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| Assertion (A): | Na+ and Al3+ are isoelectronic but the magnitude of ionic radius of Al3+ is less than that of Na+. |
| Reason (R): | The magnitude of effective nuclear charge of the outer shell electrons in Al3+ is greater than that in Na+. |
| 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 and (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Atomic Size |
 88%
From NCERT
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Assertion(A): The mobility of sodium ion is lower than that of potassium ion.
Reason(R): The ionic mobilities depend on the effective radius of the ion.
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 and R is false.
4. A and R both are false.
Reason(R): The ionic mobilities depend on the effective radius of the ion.
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 and R is false.
4. A and R both are false.
Subtopic: Â Atomic Size |
 74%
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Match the following isoelectronic species in column I and column II :
| Column I | Column II |
| i. | a. |
| ii. Ar | b. |
| iii. | c. |
| iv. | d. |
| i | ii | iii | iv | |
| 1. | b | c | a | d |
| 2. | c | b | a | d |
| 3. | c | d | b | a |
| 4. | b | c | d | a |
Subtopic: Â Atomic Size |
 86%
From NCERT
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Match the correct atomic radius with the corresponding element.
|
Element |
Atomic radius (pm) |
|
A. Be |
i. 74 |
|
B. C |
ii. 85 |
|
C. O |
iii. 112 |
|
D. B |
iv. 77 |
|
E. N |
v. 66 |
Codes
| Options: | A | B | C | D | E |
| 1. | i | ii | iii | iv | v |
| 2. | iii | iv | v | ii | i |
| 3. | iv | ii | iii | i | v |
| 4. | v | ii | i | iii | iv |
Subtopic: Â Atomic Size |
 80%
From NCERT
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- 1(current)
Q. No.
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