A normal man respires in a minute
1). 10—15 times
2). 14—18 times
3). 20—25 times
4). 25—30 times
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1. In fireworks, the green flame is produced because of
2. A man is hemophiliac. This indicates that he
3. The fundamental particles present in the nucleus of an atom are
4. When formaldehyde and potassium hydroxide are heated we get
5. Which of the following is a flightless bird?
6. Which of the following is not a precious semiprecious stone?
7. Lungs have a large number of alveoli for
8. What are the major pollutants of cigarette smoke?