Which does not give ammonia with water

Which of the following give ammonia with water

Which of the following compounds give ammonia with water?

Which of the following compounds give ammonia with water?

Ammonia compound which upon heating does not give ammonia is:

Soap does not give lather with hard water. Why?

Give reasons for the following: (a). Alkanline earth metals cannot be obtained by chemical reduction. (b). Alkaline earth metals have stronger tendancy to form complexes than alkai metals. (c ). Magnesium nitride on reacting with water gives ammonia, but magnesium chloride does not give HCI on reacting with water.

Give reasons for the following: (a). Alkanline earth metals cannot be obtained by chemical reduction. (b). Alkaline earth metals have stronger tendancy to form complexes than alkai metals. (c ). Magnesium nitride on reacting with water gives ammonia, but magnesium chloride does not give HCI on reacting with water.