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 EH3 h

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 EH3 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.

(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.

Prashant Kotian · Accepted Answer

Correct answer: C. HF < HCl < HBr < HI (bond length order) F < Cl < Br < I (radius order) PH3 < AsH3 < NH3 < SbH3 < BiH3 (Boiling point order) Maximum possible covalency of phosphorous is 6

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