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34 votes
Why is an experiment performed in a well-ventilated area? a) Because oxygen gas is generated and it is flammable. b) Because hydrogen gas is generated and it is flammable. c) Because hydrogen gas is generated and it is inert d) Because helium gas is generated and it is flammable.

User Gizmondo
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1 Answer

13 votes
13 votes

Answer: Letter B

Step-by-step explanation:

The question requires us to choose, among the options given, which one presents a reason for an experiment being performed in a well ventilated area.

To answer this question, let's analyze the options given and the characteristics of the gases considered in these options (oxygen, hydrogen and helium gas):

- Helium gas is an inert gas, as it is formed by atoms of a noble gas (known for being inert);

- Although oxygen gas might cause other materials that burn to ignite more easily and burn more rapidly, it is not a flammable gas itself;

- On the other hand, hydrogen gas is very flammable and it must be handled carefully.

Considering the information above, we can make the following remarks about the options given:

- Letter a is not correct because oxygen gas is not flammable;

- Letter b is not correct because hydrogen gas is not inert;

- Letter c is correct: hydrogen gas is very flammable and it might offer a risk to the lab users;

- Letter d is not correct because helium gas is actually inert, and not flammable.

Therefore, the best option to answer this question is letter B.

User Gleb Kostyunin
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