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Assertion (A) : $B F_{3}$ is non polar while $P F_{3}$ is polar
Reason (R) : ${BF}_{3}$ is trigonal planar whereas ${PF}_{3}$ is pyramidal in shape

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If both A and R are true and R is the correct explanation of A

If A is true but R is false

If both A and R are false

If both A and R are true but R is not the correct explanation of A

answer is A.

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Detailed Solution

$B F_{3}$ is non polar as its dipole moment is zero due to symmetrical trigonal planar geometry. ${PF}_{3}$ is polar as it has dipole moment due to pyramidal shape

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