12th Class Biology Sample Paper Biology - Sample Paper-10

  • question_answer
    Anil was waiting for a bus at a bus stop alongwith his son. A bus came which was emitting black smoke from the exhaust pipe due to which his son started coughing. Anil stopped the bus and asked the driver to show pollution certificate of bus.
    (i) Why did Anil's son started coughing due to vehicular exhaust?
    (ii) What values were shown by Anil?

    Answer:

    (i) The vehicular exhaust contains harmful gases like sulphur dioxide \[(S{{O}_{2}})\] and nitrous oxide\[({{N}_{2}}O)\], which are harmful to human health and affect their lungs. It can also cause asthma and coughing.
    (ii) Anil is alert and a responsible person who can express boldness towards environment consciousness.


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