d & f block elements | 2nd PUC Chemistry | Important Questions answers
ฝัง
- เผยแพร่เมื่อ 20 ก.ย. 2024
- 12th CBSE chemistry | 2nd PUC CHEMISTRY | D & F block elements | Important Questions answers
Preparation of potassium dichromate
Preparation of potassium permanganate
Spin only formula
Lanthanoid contraction
Transition elements are coloured
Pdf plzz sir