Take an empty glass bottle. Turn it upside down. Dip the open mouth of the bottle into the bucket filled with water as shown in Figure 15.13 (a). Does water enter the bottle?
Now tilt the bottle slightly. Can you see water entering the bottle? Do you see bubbles coming out of the bottle or hear any bubble sound Figure 15.13(b)? Can you explain bubbles coming out of the bottle?
Important Questions on Air
During winter vacations, Manava and Urja went to meet their grandmother who lives in Kosani. To protect them from cold, Grandmother lighted angithi in their room. Both Manav and Urja felt warm and cozy and immediately fell asleep. Sometime in the late night, Urja felt suffocated and started coughing heavily. Manav woke up, immediately opened the main door of the room and saved Urja from further suffocation.
What values were shown by Manav?
During winter vacations, Manava and Urja went to meet their grandmother who lives in Kosani. To protect them from cold, Grandmother lighted angithi in their room. Both Manav and Urja felt warm and cozy and immediately fell asleep. Sometime in the late night, Urja felt suffocated and started coughing heavily. Manav woke up, immediately opened the main door of the room and saved Urja from further suffocation.
Which gas causes suffocation in a closed room?
