What could we do for a dead person?
There isn’t any verse in the Quran that says to read it to dead people. Even though the tradition is to read the entire Quran (khatm) or read some verses like Yā Sīn, there’s no knowledge in the revelation about this.
The Quran tells us what we can do for a dead person: Pray. Not the entire Quran, but only the verses about forgiveness should be read. Most of these prayers in the Quran are the Rabbana prayers (al-Baqara [2] 201; Ibrahim [14] 41). The 10th verse of the Surah Hashr [59] is another correct example:
“And those who came after them say: Forgive us and our brethren who were before us in the faith…”
Is there any sense to read these verses to a dead person?
• “To warn whoever is alive…” (Yā Sīn [36] 70).
• “Do you not understand?” (as-Saffat [37] 155).
• “And present to them an example…” (Yā Sīn [36] 13).
• “…Feed the miserable and poor…” (al-Hajj [22] 28).
• “Do not even approach adultery…” (al-Isra [17] 32).
• “…And fight against the disbelievers collectively as they fight against you collectively…” (at-Tawba [9] 36).
• “This is Hell which you were promised!” (Yā Sīn [36] 63).