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Question

Choose the correct option .

A
CsH > KH > NaH < LiH (Order of stability)
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B
H2O<NH3<CH4 (Order of dipole moment)
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C
PH3<AsH3<NH3<SbH3 (Order of boiling point )
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D
X .................. H ___ X, X = O > F > N > S > Cl
(Order of strength of H-bonding)
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Solution

The correct option is C PH3<AsH3<NH3<SbH3 (Order of boiling point )
CsH < KH < NaH < LiH
The stability of the hydrides of the element from a particular group decreases with increasing atomic number (going down the group )
CH4<NH3<H2O
Dipole moment depends upon the different between the electronegativitiies of the bonded atoms, and the internucler separation.
PH3<AsH3<NH3<SbH3
Boiling point increase with an increase in molecular mass, NH3 being an exception because of strong hydrogen bonding
Cl < S < N < O < F
The strength of hydrogen bonding depends upon the electrongativity and the size. Higher electronegativity and smaller size increases the strength of hydrogen bonding

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