Advertisements
Advertisements
प्रश्न
Classify Calcium oxide. Also give a balanced equation to prepare it.
Advertisements
उत्तर
calcium oxide → Basic oxide
2Ca + O2 → 2CaO
APPEARS IN
संबंधित प्रश्न
Answer the question put against the following constituents of air :
Water vapours : Explain their role in modifying the earth’s climate.
Answer the question put against the following constituents of air :
Carbon dioxide : “Although carbon dioxide plays no role in respiration, all life would come to an end if there is no carbon dioxide in air.” Support this statement with relevant facts.
Write ‘true’ or ‘false for the following;
Carbon dioxide is given out during photosynthesis
State a reason why there is a balance in the amount of carbon dioxide in the air, even though carbon dioxide is released into the atmopshere by various processes.
Name three different appliances where air is utilized.
State whether the following statement is ‘true’ or ‘false’. If false write the correct statement.
The percentage of carbon dioxide in the air is between 0.2 to 0.4%.
When cooled to -57°C, gaseous carbon-di-oxide becomes a liquid.
Tri oxygen molecule is known as ______.
Match the following
| 1. | Nitrogen | a. | Acid rain |
| 2. | CO2 | b. | Global warming |
| 3. | Melting of glaciers | c. | Volcanic gases |
| 4. | Corrosion of bridges | d. | Aerated drinks |
Observe the picture given in figure carefully and answer the following questions.
- What is covering the nose and mouth of the police man?
- Why is he putting a cover on his nose?
- Can you comment on air quality of the place shown in the figure?
