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Arrange the following in order of increasing base strength. NH_(3), PH_(3), AsH_(3), SbH_(3), BrH_(3) |
Answer» Solution :The basis character of these hydrides depends UPON the strength of the additional element-hydrogen bond formed when the hydride accepts a proton.  On moving down the group, the size of the element increases and th strength of the E-H bond decreases. CONSEQUENTLY, the TENDENCY of the hydride to accept a proton decreases and hence the BASIC strength decreases down the group, i.e., `NH_(3) gt PH_(3) gt AsH_(3) gt SbH_(3) gt BiH_(3)`. |
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