Advertisements
Advertisements
प्रश्न
Fill in the blank:
The gas evolved as a product of combustion as well as respiration is ______.
Advertisements
उत्तर
The gas evolved as a product of combustion as well as respiration is carbondioxide.
APPEARS IN
संबंधित प्रश्न
Match the statements in Column A, with those in Column B.
| Column A | Column B |
| 1. Largest Constituent of air, which dilutes the activity of oxygen. | (a) Oxygen |
| 2. A gas used for filling weather observeation balloons. | (b) Carbonic acid |
| 3. An acid formed by the dissolution of sulphur dioxide gas in water. | (c) Sulphuric acid |
| 4. An acid formed by the dissolution of carbon dioxide in water. | (d) Helium |
| 5. A gas vital for respiration. | (e) Nitrogen |
Write the chemical name of The white insoluble solid formed on the reaction of carbon dioxide with lime water.
Fill in the blank
Air is a ______ of gases
Give a brief account of the discovery of air and the scientists involved.
Name the following.
Inert gases in the air
Name the following.
Gases that are harmful to the ozone layer
Air has variable composition and hence there is ______ oxygen at lower altitudes than at higher altitudes.
Mention two advantages of wind energy.
______ is important for all living creatures.
Match the items of Column I with the items of Column II
| Column I | Column II | ||
| (a) | Weather cock | (i) | Gases and fine dust particles |
| (b) | Mountaineers | (ii) | Sailing yacht |
| (c) | Fine hair inside the nose | (iii) | Oxygen cylinders |
| (d) | Smoke | (iv) | Direction of air flow |
| (e) | Wind | (v) | Prevent dust particles |
