Chemical BondingHard
Question
Given below are two statements :
Statement I: The halogen that makes longest bond with hydrogen in HX, has the smallest covalent radius in its group.
Statement II : A group 15 element's hydride ${EH}_{3}$ has the lowest boiling point among corresponding hydrides of other group 15 elements. The maximum covalency of that element E is 4 .
In the light of the above statements, choose the correct answer from the options given below.
Options
A.Both Statement I and Statement II are true.
B.Statement I is false but Statement II is true.
C.Both Statement I and Statement II are false.
D.Statement I is true but Statement II is false.
Solution
$HF < HCl < HBr < HI$ (bond length order)
$F < Cl < Br < I$ (radius order)
${PH}_{3} < {AsH}_{3} < {NH}_{3} < {SbH}_{3} < {BiH}_{3}$ (Boiling point order)
Maximum possible covalency of phosphorous is 6
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