Class 10 Chemistry Certification MCQs – Practice Test 3 (Chapter 6)

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MCQ 11: Percentage of hydrogen in the air is:

0.99
0.8
0.5
0.25

MCQ 12: Which of the following have an impact on brain development in human beings especially among children?

chlorofluorocarbons (CFCs)
methane
carbon monoxide
lead compounds

MCQ 13: Which of the following is true about ozone?

light blue in colour
odourless
not harmful
not a pollutant

MCQ 14: Which of the following is a powerful irritant which can aggravate the symptoms of people who suffer from respiratory disorders?

sulphur dioxide
carbon monoxide
carbon dioxide
oxides of nitrogen

MCQ 15: What is meant by the term 'meso'?

top
middle
turning
changing

Class 10 Chemistry Quiz App & e-Book – Environmental Chemistry I Atmosphere Certification Guide

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