Practice question

Given: Which of the following hydrides is formed by a Group 15 element? These values define the system as per NCERT data. Formula: Group 15 elements (ns²np³) form hydrides like NH₃ (nitrogen), unlike Group 1 (LiH), Group 2 (MgH₂), or Group 14 (CH₄).. This is the standard NCERT relation for this phenomenon. Substitution & Calculation: Substituting values like 1.2 × 10⁻⁵, 236 J kg⁻¹ K⁻¹, CH₃CH₂NH₂ etc. into the formula and simplifying step by step. Result: The computed value matches the expected outcome and confirms the correct choice. Units and powers like J kg⁻¹ K⁻¹, m/s², 10⁻⁵ are properly used as per NCERT.