Question

Which set of elements form electron-precise hydrides?

• A. \( B, Al, Ga \)
• B. \( C, Si, Ge \)
• C. \( N, P, As \)
• D. \( B, C, N \)

Hint:

Electron-precise hydrides obey the octet rule, forming stable covalent bonds with no extra electron pairs.

Answer 1

The Correct Option is B

Step 1: Understanding Electron-Precise Hydrides Electron-precise hydrides are covalent compounds in which all valence electrons participate in bonding, forming stable molecules. Step 2: Identifying Suitable Elements Elements from Group 14 (Carbon Family) form electron-precise hydrides: \[ \text{CH}_4, \text{SiH}_4, \text{GeH}_4 \] These obey the octet rule, filling valence shells. Conclusion Thus, the correct answer is: \[ C, Si, Ge \]