Chemical Bonding - Result Question 73
####49. Match the orbital overlap figures shown in Column I with the description given in Column II and select the correct answer using the codes given below the Columns.
(2014 Adv.)
Codes
| A | B | C | D | A | B | C | D | ||
|---|---|---|---|---|---|---|---|---|---|
| (a) | 4 | 3 | 2 | 1 | (b) | 1 | 2 | 3 | 4 |
| (c) | 2 | 3 | 1 | 4 | (d) | 4 | 1 | 2 | 3 |
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Answer:
Correct Answer: 49. (c) $A \rightarrow 2 ; B \rightarrow 3 ; C \rightarrow 1 ; D \rightarrow 4$
Solution:
- PLAN This problem includes basic concept of bonding. It can be solved by using the concept of molecular orbital theory.
Any orbital has two phase $+ve$ and $-ve$. In the following diagram, + ve phase is shown by darkening the lobes and $-ve$ by without darkening the lobes.
When two same phase overlap with each other, it forms bonding molecular orbital otherwise antibonding.
$\sigma$-bond
On the basis of above two concepts, correct matching can be done as shown below: A.
B.
C.
D.
$\therefore A \rightarrow 2, B \rightarrow 3, C \rightarrow 1, D \rightarrow 4$
Hence, (c) is the correct option.
