Teaching BPSC बिहार प्राथमिक (1 to 5) शिक्षक भर्ती 4.0 Mock Test General Science Chemistry Basic Concepts of Chemistry
A ______ is a substance composed of two or more elements which are chemically combined.
1
Matter
2
Substance
3
Compound
4
More than one of the above
5
None of the above