According to Lewis concept acid is(A) proton donor (B)electron pair donor (C)proton acceptor (D)electron pair acceptor

Options

A. proton donor
B. electron pair donor
C. proton acceptor
D. electron pair acceptor .

Explanation

To solve the question, we need to understand the Lewis concept of acids and bases. Let's break it down step by step:

### Step 1: Understand the Lewis Concept
The Lewis concept defines acids and bases in terms of electron pairs. According to this concept:
- **Lewis Acid**: An electron pair acceptor.
- **Lewis Base**: An electron pair donor.

### Step 2: Analyze the Options
Now, let's analyze the given options based on the Lewis concept:
- (A) Proton donor: This is related to the Brønsted-Lowry concept, not Lewis.
- (B) Electron pair donor: This describes a Lewis base, not an acid.
- (C) Proton acceptor: Again, this is related to the Brønsted-Lowry concept, not Lewis.
- (D) Electron pair acceptor: This matches the definition of a Lewis acid.

### Step 3: Identify the Correct Answer
From our analysis, the only option that correctly describes a Lewis acid is:
- **(D) Electron pair acceptor.**

### Conclusion
Thus, according to the Lewis concept, the correct answer is (D) electron pair acceptor.

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