General Science – Elements and Metals

6. Chemical formula for water is

A. NaAlO2
B. H2O
C. Al2O3
D. CaSiO3

Show Answer

7. The gas usually filled in the electric bulb is

A. nitrogen
B. hydrogen
C. carbon dioxide
D. oxygen

Show Answer

8. Washing soda is the common name for

A. Sodium carbonate
B. Calcium bicarbonate
C. Sodium bicarbonate
D. Calcium carbonate

Show Answer

9. Quartz crystals normally used in quartz clocks etc. is chemically

A. silicon dioxide
B. germanium oxide
C. a mixture of germanium oxide and silicon dioxide
D. sodium silicate

Show Answer

10. Which of the gas is not known as green house gas?

A. Methane
B. Nitrous oxide
C. Carbon dioxide
D. Hydrogen

Show Answer