Which of the trends of the indicated property is “INCORRECT” ?

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$Acidic strength: HOC ℓ < HC ℓ O_{2} < HC ℓ O_{3} < HC ℓ O_{4}$

$Boiling points: {NH}_{3} < {PH}_{3} < {AsH}_{3} < {SbH}_{3}$

$Stability: C ℓ O^{-} < C ℓ O_{2}^{-} < C ℓ O_{3}^{-} < C ℓ O_{4}^{-}$

$Melting points: H_{2} S < H_{2} Se < H_{2} Te < H_{2} O$

answer is B.

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Detailed Solution

$\begin{array}{l} {Property NH}_{3} {PH}_{3} {ASH}_{3} {SbH}_{3} {BiH}_{3} \\ Boiling point (k) 240 186 211 256 295 \end{array}$

$∴ {Order of B. P. S: PH}_{3} < {ASH}_{3} < {NH}_{3} < {SbH}_{3}$

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