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Q.

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

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21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!
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a

 Melting points: H2S<H2Se<H2Te<H2O

b

 Stability: CℓO−<CℓO2−<CℓO3−<CℓO4−

c

 Boiling points: NH3<PH3<AsH3<SbH3

d

 Acidic strength: HOCℓ<HCℓO2<HCℓO3<HCℓO4

answer is B.

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Detailed Solution

 Property                                       NH3                     PH3                  ASH3              SbH3                  BiH3 Boiling  pointk           240                       186                          211                  256                             295 

∴ Order of B. P. S: PH 3<ASH3<NH3<SbH3

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