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Aptitude Test Topic: General Knowledge

General Knowledge Section consists of MCQs on World Geography, Atmosphere, Science and Literature, events, Current Affairs, Pakistan Affairs, and International Organizations.

Directions

The following are questions on Your General Knowledge. 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.

General Knowledge: Atmosphere Practice MCQ

Question Statement:

Unpolluted rain water has a pH of about 6. Which of the following gas causes this pH?

Carbon dioxide

Oxygen

Nitrogen dioxide

Sulfur dioxide

Explanation:

Correct Answer: A

pH 6 is slightly acidic.
Carbon dioxide dissolves in water to form carbonic acid, which is slightly acidic.
CO2 + H2O --> H2CO3
Nitrogen dioxide dissolves to form nitric acid while sulfur dioxide dissolves to form sulfuric acid, with a pH of about 3.

Question: 3 Test: 1 of 3 Next Test

Tests

You are taking Aptitude Test No. 1

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 3 and Test Number 1 of General Knowledge: Atmosphere. To deal with General Knowledge 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: Unpolluted rain water has a pH of about 6. Which of the following gas causes this pH? .... with options: Carbon dioxide , Oxygen, Nitrogen dioxide , Sulfur dioxide can be solved with the concepts and understanding of General Knowledge.