- 1(current)
Q. No.
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The electronic configuration of four elements are :
(I) [Kr]5s1
(II) [Rn]5f146d17s2
(III) [Ar]3d104s24p5
(IV) [Ar]3d64s2
Consider the following statements :
(i) I Shows variable oxidation state
(ii) II is a d-block element
(iii) The compound formed between I and III is covalent
(iv) IV shows single oxidation state
Which statement is True (T) or False (F)?
1. FTFF
2. FTFT
3. FFTF
4. FFFF
Subtopic: Â Nature of Compound |Â Electronic Configuration |
Level 3: 35%-60%
Hints
Given below are two statements:
| Assertion (A): | The 19th electron in the potassium atom enters into the 4s-orbital, not into the 3d orbital. |
| Reason (R): | (n + l ) rule is followed for determining the orbitals of the lowest energy state. |
| 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 but (R) is False. |
| 4. | Both (A) and (R) are False. |
Subtopic: Â Electronic Configuration |
 79%
Level 2: 60%+
Hints
Match Column-I with Column-II.
| Column-I | Column-II | ||
| (a) | Copper | (i) | Non-metal |
| (b) | Fluorine | (ii) | Transition metal |
| (c) | Silicon | (iii) | Lanthanoid |
| (d) | Cerium | (iv) | Metalloid |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (iv) | (i) | (iii) |
| 2. | (ii) | (i) | (iv) | (iii) |
| 3. | (iv) | (iii) | (i) | (ii) |
| 4. | (i) | (ii) | (iii) | (iv) |
Subtopic: Â Modern Periodic Table & Periodicity |Â Electronic Configuration |
 88%
Level 1: 80%+
NEET - 2020
Hints
- 1(current)
Q. No.
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