નીચેની કઇ વ્યવસ્થામાં ક્રમ સખ્તાઇથી તેની વિરુદ્ધ લખેલી સંપત્તિ મુજબ નથી?

Q: નીચેની કઇ વ્યવસ્થામાં ક્રમ સખ્તાઇથી તેની વિરુદ્ધ લખેલી સંપત્તિ મુજબ નથી?

c The correct increasing order of basic strength $N H_{3} > P H_{3} > A S H_{3} > S b H_{3}$ $N H_{3}$ is the most basic because of its small size, the electron density of electron pair is concentrated over small region. As the size increases, the electron density gets diffused over a large surface area. Hence, the ability to donate the electron pair (basicity) decreases. The other three statements given are correct.

Question

A$CO _{2} < SiO _{2} < SnO _{2} < PbO _{2}$ (ઓક્સિકૃત પાવર )
B$H F < H C l < H B r < H l$ (એસિડિક ક્ષમતા)
C$N H_{3} < P H_{3} < A s H_{3} < S b H_{3}$ (બેઝિક ક્ષમતા)
D$B < C < O < N$ (પ્રથમ આયનીકરણ એન્થાલ્પી)

AIIMS 2018, Medium

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Solution

c
The correct increasing order of basic strength

$N H_{3} > P H_{3} > A S H_{3} > S b H_{3}$

$N H_{3}$ is the most basic because of its small size, the electron density of electron pair is concentrated over small region. As the size increases, the electron density gets diffused over a large surface area. Hence, the ability to donate the electron pair (basicity) decreases.

The other three statements given are correct.

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