Janaazah

Sprinkling water on the soil of the grave after burial

Q: From the Ahaadith and the statements of the Fuqahaa (jurists), it is understood that after burial, sprinkling water on the soil of the grave is Mustahab (recommended) and permissible. The question is: 

Will it be considered Mustahab and permissible to sprinkle water merely for the purpose of settling the soil? 

If it is the rainy season and there is no fear of the soil scattering, then at such a time, will it still be permissible and Mustahab to sprinkle water with the intention of acting upon the Hadith?

Is the body of the deceased pure or impure?

Q: Is the body of the deceased, before giving ghusl, regarded as paak or napaak i.e. is the deceased body treated like a person in the state of hadath (i.e. if the water which touches the deceased’s body comes on to the person giving ghusl, the water will not be regarded as napaak and impure) or is the actual body of the deceased treated as something impure like an animal which dies a natural death is treated as impure (i.e. if the water which touches the deceased’s body comes on to the person giving ghusl, the water will be regarded as napaak and the person will have to cleanse his body of that water)?

Reciting the beginning and ending verses of Surah Baqarah and making dua after burial

Q: As I understand, after the burial of the deceased, it is Sunnah to recite the beginning verses of Surah Baqarah at the head side and the last verses of Surah Baqarah at the feet side. Additionally, a dua is typically recited. In our practice, we first recite Surah Fatiha, followed by the beginning verses of Surah Baqarah at the head side, and the last verses of Surah Baqarah at the feet side, which are recited loudly so that everyone can hear. My questions are as follows: 

Is it permissible to start with Surah Fatiha? In the narrations, only Surah Baqarah is mentioned, and not Surah Fatiha. 

To what extent is it permissible to recite these verses loudly? 

Afterward, a dua is made facing the Qibla. This dua is a collective, loud dua where the Imam makes the dua aloud and everyone responds with "Ameen." 

My questions regarding this are: Should the dua not be made individually? To what extent is it permissible to make a collective dua after the burial?