Ruling of niqab in the light of Quran and Hadees
You need to read Tafseer and Hadith for better understand those verses
About hijab there are one more Ayah
O Prophet, tell your wives and your daughters and the women of the believers to bring down over themselves [part] of their outer garments. That is more suitable that they will be known and not be abused. And ever is Allah Forgiving and Merciful..