TS EAMCET · Chemistry · Thermodynamics (C)
The bond energies (in \(\mathrm{kJ} \mathrm{mol}^{-1}\) ) of \(\mathrm{P}-\mathrm{H}\), As- \(-\mathrm{H}\) and \(\mathrm{N}-\mathrm{H}\) are respectively
- A 247,389 and 318
- B 247,389 and 318
- C 318,389 and 247
- D 318,247 and 389
Answer & Solution
Correct Answer
(D) 318,247 and 389
Step-by-step Solution
Detailed explanation
Decreasing order of these hydrides is \[ \mathrm{N}-\mathrm{H}>\mathrm{P}-\mathrm{H}>\mathrm{As}-\mathrm{H} \] Bond energies \(389>318>247\) (decreases with increase in bond lengths)
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