CHEMISTY - FILL IN THE BLANKS - Interactive Fill in the Blanks For chemistry

🧠 Interactive Fill in the Blanks

Type your answers in the large boxes below!

1. The Earth is surrounded by an envelope of air called the .

2. Air contains approximately % Nitrogen.

3. In the lab, is used to prove the presence of Carbon dioxide.

4. The process of burning fuel in the presence of oxygen is called .

5. CNG mostly consists of gas.

6. When fuel burns, it reacts with oxygen to form Carbon dioxide and .

7. The gas that turns white anhydrous copper sulphate to blue is .

8. A fire is extinguished if the supply of (or oxygen) is cut off.