question_answer 29)

Carbon exists in the atmosphere in the form of (a) Only carbon monoxide                                           (b) carbon monoxide in traces and carbon dioxide (c) Only carbon dioxide                                                 (d) coal

Answer:

                (c) Carbon exists in the atmosphere in the form of carbon dioxide gas in air (only0.03%). Carbon also occurs in the earth's crust in the form of minerals likes carbonates. It also occurs in the form of fossil fuels, organic compounds, wood, cotton and wool, etc.