Question

) Which hydride out of the following does not exist :
(a) NH3
(b) H2S
(c) PH3
(d) PH5​

Answer 1

Answer:

pH5 is correct . I hope it is help you

Answer 2

Among the given hydrides, PH₅ does not exist.

• In PH₅, hybridization is absent because the electronegativity difference between hydrogen and phosphorus is not sufficient for bond formation and the compound formed is highly unstable. So, the PH₅ disassociates into PH₃ and H₂.
• While the rest of the given hydrides, NH₃, H₂S, and PH₃ are known to exist in nature because they have stable bonds.