Question

Among ash3 nh3 ph3 sbh3 which is strong base

Answer 1

the strongest base should be NH3 because N is smallest in size and is able to make more stable sigma bond ...
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Answer 2

Among given bases, the stronger base is $NH_3$

Explanation:

• When the elements present in the bases are located on the periodic table it infers that they all belong to the 15th group.
• The location of elements in the periodic table is as follows

1. Nitrogen
2. Phosphorus
3. Arsenic
4. Bismuth

• From nitrogen to bismuth, the atomic size increases due to which the density of electron decreases.
• As a result the basic strength also decreases.
• Due to this the base formed by nitrogen which is $NH_3$ is the strong base, whereas $SbH_3$ is a weak base.

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