Dead space air is  The amount of air left in lungs after deepest expiration.  About 150 ml  Both of these  None of these Answer: 2 The amount of air left in the lungs after the deepest expiration is Residual air.  2. When fully saturated, one molecule of oxyhaemoglobin carries the following number of oxygen molecules.  Two  Three  Four  None of these  Answer: 3 One molecule of Haemoglobin contains four molecules of Haem, so four iron atoms, for carrying for molecules of Oxygen 3.Which of the following breathing process in human is passive  Expiration Aspiration  Inspiration  Forced breathing  Answer: 1 4. The amount of oxygen in tidal vol. is approximately  1…