Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
Brass is an alloy made of:
1
Copper and Tin
2
Copper and Zinc
3
Copper and Aluminum
4
More than one of the above
5
None of the above