A. Oxygen
B. Hydrogen
C. Sulphur
D. Carbon
Related Mcqs:
- The atmospheric element which combines readily with many elements and compounds in rocks is:
- Which are the four most abundant elements in living cells ??
- The two major consitituents of the sun are
- Freon 12 is a compound consisting of stoms of
- Biogas is composed of __________?
- which of the following gas discovered by Scheele??
- In a volume of air near the earth’s surface, _____________ occupies 78 percent and ____________ nearly 21 percent.
- Which element is vital to plants and animals for the synthesis of proteins and nucleic acies?
- According to most accepted theories, the atmosphere of earth before origin of life consisted of a mixture of:
- Originally the primitive atmosphere was reducing because:
