AllahkaBanda

^barak Allahu feekee, ukhti as far hints for first question then Surah an-Nahl and Surah al-Qasas

answers to rest of the three questions

2 - Which salah could be performed without wudu? Salat on Prophet (sal-allahu alayhi wa sallam)

3 - Which pious Muslim met the Prophet (sal-allahu 'alayhi wa sallam) and will be khalifa of his ummah but he was not a sahabi? Prophet Issa ('alayhi as-salam) - he ('alayhi as-salam) met the Prophet (sal-allahu alayhi wa sallam) on mi'raj and will be khalifa of his ummah in end times

4 - Name the surah in which its first 7 ayaat Allah Ta'ala swears by one thing? Surah al-Shams