General Knowledge : : Chemistry Questions & Answers

  1. The material used in the manufacture of lead pencil is:

A. Graphite

B. Silicon

C. Charcoal

D. Phosphorous

  1. Nail polish remover contains?

A. Chlorine

B. Benzene

C. Petroleum

D. Acetone

  1. What is the pH value of Blood?

A. 10.4

B. 7.4

C. 7

D. 5

  1. What is the chemical symbol of sodium?

A. So

B. Na

C. Ca

D. He

  1. Air is a:

A. Compound

B. Colloid

C. Element

D. Mixture