A molecule with the formula AX4Y has all it's elements from p-blo… - Vidyadip

MCQ

A molecule with the formula AX₄Y has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y. Elements X and Y have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is :

A
Square pyramidal
B
Octahedral
C
Pentagonal planar
D
Trigonal bipyramidal

✓

Answer

(A) Square pyramidal
Explanation: Given A is rarest, monoatomic, non-radioactive p-block element and form AXY type of molecule.
∴ It is concluded that it is Xe
It is given the electronegativity of A is less than X & Y
It is given the electronegativity of X & Y is highest and second highest respectively among all element.
∴ X & Y are F & O
∴ Compound is consider as $XeOF _4$ with square pyramidal shape.

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