Class 10 Chemistry MCQs – Practice Test 18 (Chapter 6)

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Environmental Chemistry I Atmosphere MCQ – Practice Test 18 PDF Download

MCQ 86: What is the extension of the exosphere above the surface of Earth?

80 km to 400 km
0 km to 12 km
400 km to thousands of kilometer
none of above

MCQ 87: Maximum temperature of the troposphere is:

17 °C
−55 °C
−5 °C
1800 °C

MCQ 88: Which of the following is not an air pollutant?

carbon dioxide
carbon monoxide
sulphur dioxide
oxides of nitrogen

MCQ 89: Which of the following protects Earth's surface from being hit by most meteoroids?

troposphere
stratosphere
mesosphere
thermosphere

MCQ 90: What is meant by the term 'thermo'?

outer
top
turning
heat

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