Taking Quiz - PK MCQs

1. Which is the most abundant metal in Earth's crust?

A. Iron B. Aluminium C. Copper D. Calcium

2. What is the chemical symbol for gold?

A. Go B. Gd C. Au D. Ag

3. What is the pH of pure water?

A. 5 B. 6 C. 7 D. 8

4. What is the chemical formula of common salt?

A. NaCl B. KCl C. CaCl2 D. MgCl2

5. What is the atomic number of hydrogen?

A. 1 B. 2 C. 3 D. 4