Questions
Which one of the following hydride is most volatile
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By Expert Faculty of Sri Chaitanya
a
NH3
b
SbH3
c
PH3
d
AsH3
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Correct option is C
Down the group as the size of the atom increases affinity of hydrogen towards central atom decreases. Thereforea) X-H bond enthalpy decreasesb) Thermal stability decreases….NH3 is exothermic product,remaining four hydrides are endothermic products.c) Reducing power increasesd) acidic strength (Ka) increasese) pKa decreasesDown the group as vanderwaal's forces increasesMelting and boiling points increasesExpected BP and MP….NH3Similar Questions
Bond dissociation enthalpy of E - H (E = element) bonds is given below, which of the compounds will act as strongest reducing agent?
| Compound | NH3 | PH3 | AsH3 | SbH3 |
| 389 | 322 | 297 | 255 |
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