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Aptitude Test Topic: Chemistry

Chemistry test evaluate test taker's in-depth understanding of the subject.

Directions

The following are questions of Chemistry. Select the correct option to represent your answer.

To give the answer click/tap the option alphabet for your answer choice. for correct answer green check and for wrong answer a red cross will appear along with a button to show explanation with or without video of the question answer.

Chemistry: All Topics Practice MCQ

Question Statement:

A mixture of which one of the following pairs of gases is the cause of occurrence of most of the explosions in mines?

Hydrogen and Oxygen

Oxygen and Acetylene

Methane and Air

Carbon dioxide and Methane

Explanation:

Correct Answer: C

Sol. Generally, Carbon Monoxide, Carbon, Dioxide, Methane, Oxygen, Nitrogen and Hydrogen gases etc. are found in mines. When combined with air, they cause an explosion. 5.15% of the amount of methane in air is explosive. In air, 12.5-74% presence of carbon monoxide is explosive. In air, 4-74% carbon and hydrogen mixture may blast. Mostly in the above options, in mines, methane and air mixture is explosive.

Question: 9 Test: 13 of 15 Next Test

Tests

You are taking Aptitude Test No. 13

Each aptitude test is comprised of 10 except the last test which might have fewer than 10 in some topics.

You are at question (MCQ) number 9 and Test Number 13 of Chemistry: All topics. To deal with Chemistry questions, you must take lesson on the subject. In case of science and Art subjects revise your text books and in case of general aptitude topics take lessons from the topic page.

The question: A mixture of which one of the following pairs of gases is the cause of occurrence of most of the ex .... with options: Hydrogen and Oxygen, Oxygen and Acetylene, Methane and Air, Carbon dioxide and Methane can be solved with the concepts and understanding of Chemistry.