Class 10 Chemistry Competitive Exam MCQs – Practice Test 5 (Chapter 6)

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Environmental Chemistry I Atmosphere MCQs – Practice Test 5 PDF Download

MCQ 21: The thermosphere is divided into how many layers?

two
three
four
five

MCQ 22: What is the color of nitrogen dioxide?

colorless
pink
brown
reddish brown

MCQ 23: Which of the following is not true about carbon monoxide?

it is poisonous
it is insoluble in water
it is an air pollutant
it can cause death

MCQ 24: Which of the following is true about sulfur dioxide?

it is colorless
it is odourless
it is not an air pollutant
it does not cause breathing difficulties

MCQ 25: Height of troposphere is:

10 Km
12 Km
50 Km
80 Km

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