Question

when ammonia dissolves in water, no of hydrogen bonds formed by ammonia

Answer 1

Answer:

An ammonia molecule can form two hydrogen bonds, not one. An important difference in terms of hydrogen bonding between ammonia, NH3 , and water, H2O , lies in the ratio between how many partial positive hydrogen atoms and how many lone pairs of electrons each have.

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Answer 2

When ammonia is dissolved in water it can form 4 H-bonds ( 3 H atoms with Oxygen and N atom with H atom of oxygen ).

But..... ....

We have to see the ratio of lone pair to delta+ H atoms

If NH3 was to form 4 H-bonds then it should have 3 lone pairs, which N does not have .

Hence NH3 can form 2 H-bonds in water.