For the reaction ,
A + 2B ___ C + 2D
The correct statement is

Options

A. Equivalents of A = 2 x equivalents of B
B. Moles of A reacted = Moles of D formed
C. Equivalents of B = Equivalents of C
D. Moles of B reacted = `("Moles of C formed")/(2)`

Answer

To solve the question regarding the reaction \( A + 2B \rightarrow C + 2D \), we need to analyze the statements provided and determine which ones are correct based on the stoichiometry of the reaction.

### Step-by-Step Solution:

1. **Understanding the Reaction:**
The balanced chemical equation is:
\[ A + 2B \rightarrow C + 2D \]
This indicates that 1 mole of A reacts with 2 moles of B to produce 1 mole of C and 2 moles of D.

2. **Analyzing Each Statement:**
- **Statement 1:** "Equivalent of A is 2 times equivalent of B."
- This statement is incorrect. The stoichiometry shows that 1 equivalent of A reacts with 2 equivalents of B, not the other way around.

- **Statement 2:** "Mole of A reacted with mole of D formed."
- This statement is also incorrect. According to the reaction, 1 mole of A produces 2 moles of D. Therefore, it is not accurate to say that 1 mole of A reacts to form 1 mole of D.

- **Statement 3:** "Equivalent of B is equal to equivalent of C."
- This statement is correct. From the balanced equation, for every 2 moles of B that react, 1 mole of C is produced. Therefore, the equivalents of B and C are related by the stoichiometric coefficients.

- **Statement 4:** "Moles of B reacted is equal to moles of C formed by 2."
- This statement is also correct. The reaction shows that 2 moles of B are required to produce 1 mole of C. Hence, the relationship can be expressed as moles of B being twice that of moles of C.

3. **Conclusion:**
The correct statements are:
- Statement 3: Equivalent of B is equal to equivalent of C.
- Statement 4: Moles of B reacted is equal to moles of C formed by 2.

### Final Answer:
The correct statements are C and D.