Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Structure of Atom
The percentage of water of crystallization in washing soda is _________
1
19.80
2
62.9
3
10.6
4
More than one of the above
5
None of the above