Gas chemistry

1

Which of the following statements is correct for the test for carbon dioxide?

2

Which of the following statements is correct for the test for hydrogen gas?

3

Which of the following statements is correct for the test for oxygen gas?

4

Which gas is used in food packaging?

5

Which of the following equations represents the reaction that is used to safely prepare hydrogen gas in the laboratory?

6

Which gas is used in medicine and welding?

7

Burning elements in oxygen can form acidic or basic oxides. Which of the following forms an acidic oxide?

8

Which of the following chemicals is used in the test for ammonia gas?

9

The physical properties of carbon dioxide are:

10

The catalyst used in the preparation of oxygen gas is: