How many of the following are electron rich hydrides? CH_4, PH_3, H_2S, B_2H_6, HF, AlH_3, AsH_3

JEE Main Chemistry question

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How many of the following are electron rich hydrides? CH, PH, HS, BH, HF, AlH, AsH

Answer: 4

Solution

Electron-rich hydrides are molecular hydrides whose central atom retains one or more lone pairs after bonding to hydrogen (typically formed by group 15–17 elements with more than 4 valence electrons). PH, HS, HF and AsH each have lone

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Question ID VK-137484