Civil Services WBCS (Executive) Prelims + Mains Mock Tests 2025 General Science Chemistry Basic Concepts of Chemistry
The two isotopes of elemental chlorine are:
1
\(\rm ^{35}_{17}C\ and\ _{17}^{36}C\)
2
\(\rm ^{34}_{17}C\ and\ _{18}^{36}C\)
3
\(\rm ^{35}_{17}C\ and\ _{18}^{37}C\)
4
\(\rm ^{35}_{17}C\ and\ _{17}^{37}C\)