Chemistry - Complete P-block Question with Solution | TestHub
ChemistryComplete P-blockp-Block 15,16Medium2 minQB
ChemistryMediumsingle choice
Passage / Comprehension
Fifteen group elements form hydrides of type AH3 . The hydrides have a lone pair of electrons. The hydrides are covalent and have low boiling points. Their boiling points depends on their ability to form hydrogen bond and their molecular size which decide the intermolecular forces in the hydrides.
The bond angle of 15 group hydrides decrease from about to for to ; this is due to:
Options:
Answer:
B
Solution:
Explanation by Drago's Rule
Bond angle decreases from NH₃ to SbH₃ because down the group M–H bonding uses more pure p-orbitals and less sp³ hybridisation. This makes angle approach 90°.
Correct reason: use of pure p-orbital for bonding → Option (B)
Stream:JEESubject:ChemistryTopic:Complete P-blockSubtopic:p-Block 15,16
⏱ 2mℹ️ Source: QB
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