During inhalation, the air for the respiration is drawn into our body through the nostrils, then it goes into nasal passage. From there, oxygen enters into pharynx, larynx then into the windpipe, bronchi, lungs and finally to the alveoli where ...

The chemical reaction is as follows: Na₂CO₃(aq) + 2HCl (aq) → 2NaCl + H₂O + CO₂

The mineral acids are those which are obtained from minerals and do not contain carbon. E.g., HCl, H₂SO₄, HNO₃, etc.

Class 9 Science Terminal Exams MCQ Solutions Class 9th Science Session 2022-23 9th Science Terminal Exam Based MCQ Extra Questions Class IX Science MCQ Extra Questions Answers

Mass of rocket is greater than mass of gases as the rocket is used for carrying a satellite etc. to a suitable height above the ground.