April 2025
Intermediate to advanced
608 pages
27h 36m
English
book
Pearson JEE Main Chemistry Vol 2 – 2026 | As Per NTA Syllabus | 2021 to 2025 Solved Previous Years’ Questions | 5000+ Topic-wise, Miscellaneous and Numerical–Based ... Papers on MyInsights | 7th Edition
by A.K. Singhal, U.K. Singhal
Content preview from Pearson JEE Main Chemistry Vol 2 – 2026 | As Per NTA Syllabus | 2021 to 2025 Solved Previous Years’ Questions | 5000+ Topic-wise, Miscellaneous and Numerical–Based ... Papers on MyInsights | 7th Edition
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4 |
General Principles and Processes of Isolation of Elements |
HEAVIER ELEMENTS
Occurrence in Atmosphere
The atmosphere mainly contains nitrogen (78.09%), oxygen (20.95%) and other gases (about 1%).
Occurrence in Sea
Sea is the major source of elements such as Br, I, Ni, Cu, Zn, Sn and Au.
Occurrence in Earth’s Crust (Lithosphere)
Elements occur in two states in Earth’s crust:
1. Free or native state: Less reactive metals or noble metals with least electropositive nature are present in free or native state like copper, silver, gold and platinum.
Table 4.1 Most Abundant Elements in the Lithosphere
2. Combined state (minerals): Reactive metals ...
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