Teaching BPSC बिहार मध्य विद्यालय (6 to 8) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Periodic Table
Hard substance producing one non-metal and one soft metal respectively are
1
C and Na
2
S and Na
3
I and Pb
4
More than one of the above
5
None of the above