General Knowledge : : Chemistry Questions & Answers
- The material used in the manufacture of lead pencil is:
A. Graphite
B. Silicon
C. Charcoal
D. Phosphorous
- Nail polish remover contains?
A. Chlorine
B. Benzene
C. Petroleum
D. Acetone
- What is the pH value of Blood?
A. 10.4
B. 7.4
C. 7
D. 5
- What is the chemical symbol of sodium?
A. So
B. Na
C. Ca
D. He
- Air is a:
A. Compound
B. Colloid
C. Element
D. Mixture