Select correct statement (s)

Options

A. Cyanamide ion `(CN_(2)^(2-))` is isoelectronic with `CO_(2)` and has the same linear structure
B. `Mg_(2)C_(3)` reacts with water to form propyne
C. `CaC_(2)` has NaCl type lattice
D. All of the above

Explanation

To solve the question "Select correct statement(s)", we will analyze the statements provided in the video transcript step by step.

### Step 1: Analyze the Amide Ion Statement
The first statement mentions that the Amide ion is isoelectronic with CO2 and has the same linear structure.

- **Amide Ion (NH2-)**: The amide ion has a nitrogen atom bonded to two hydrogen atoms and carries a negative charge. Its electronic configuration is similar to that of a noble gas, making it isoelectronic with CO2.
- **CO2**: Carbon dioxide has a linear structure with the formula O=C=O.

**Conclusion**: The amide ion is not isoelectronic with CO2. The amide ion has a different electronic structure compared to CO2. Therefore, this statement is incorrect.

### Step 2: Analyze the Linear Structure Statement
The next part of the statement claims that the amide ion has the same linear structure as CO2.

- **Structure**: The amide ion does not have a linear structure. It has a bent structure due to the presence of lone pairs on the nitrogen atom.

**Conclusion**: This part of the statement is also incorrect.

### Step 3: Analyze the Reactivity of Mg2C3 with Water
The transcript mentions that Mg2C3 reacts with water to form propylene.

- **Chemical Reaction**: The reaction of magnesium carbide (Mg2C3) with water typically produces acetylene (C2H2) and magnesium hydroxide (Mg(OH)2), not propylene (C3H6).

**Conclusion**: This statement is incorrect because the products mentioned do not match the expected reaction.

### Final Conclusion
After analyzing the statements, we find that all the statements provided in the transcript are incorrect.