Advertisements
Advertisements
प्रश्न
_______ can be seen moving in a beam of sunlight in a dark room.
Advertisements
उत्तर
Dust particles can be seen moving in a beam of sunlight in a dark room.
APPEARS IN
संबंधित प्रश्न
Statement given below is incorrect. Write the correct statement :
Helium gas at low pressure is used for filling electric bulbs.
Tick (√) the most appropriate answer.
Symbiotic bacteria is not present in the nodules of :
Name and briefly explain four ways by which pollution of air is caused by humans.
Complete the statement given below by filling in the blank with the correct word from the words given
___________is an example of a pollutant present in the air.
Whales come up to the water surface to breathe in oxygen.
Write about the reaction of nitrogen with non metals.
______ present in the air is needed for respiration.
Explain carbon dioxide and its uses.
The solid form of CO2 is called dry ice which undergoes condensation.
Boojho took an empty plastic bottle, turned it upside down and dipped its open mouth into a bucket filled with water. He then tilted the bottle slightly and made the following observations.
- Bubbles of air came out from the bottle.
- Some water entered the bottle.
- Nitrogen gas came out in the form of bubbles and oxygen got dissolved in water.
- No bubbles formed, only water entered the bottle.
Which observations is/are correct?
