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प्रश्न
Tick (√ ) the most appropriate answer.
Magnesium burns with a dazzling white flame to form magnesium oxide, a powdery mass. The colour of magnesium oxide is :
पर्याय
milk white
grey
silvery
yellow
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उत्तर
milk white
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संबंधित प्रश्न
“Air is a mixture”. Support this statement citing at least three evidences.
Classify Calcium oxide. Also give a balanced equation to prepare it.
The diagrams below represents an experiment to show the presence of a component of air.
- State why air is sucked from – outlet ‘B’ and not from outlet “A”
- State why the air is sucked ‘slowly’ from the outlet “B”
- State the observation seen after completion of the experiment.
- State the reason for the above observation seen.
- Name another component which if present in air as a pollutant would have given a similar observation
Complete the statement given below by filling in the blank with the correct word from the words given below
The ______ is a layer which extends up to about 10-50 km. above the earth.
Explain why mountaineers carry oxygen cylinders with them?
______ is the active component of air.
Composition of the component of air ______ from place to place.
Match the following:
| 1. | More industrial cities | a. | dust particles |
| 2. | Coastal areas | b. | Humidity |
| 3. | Rainy season | c. | Carbon dioxide |
| 4. | Windy places | d. | water vapour |
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 |
Write just a few sentences for an imaginary situation if any of the following gases disappear from the atmosphere.
Nitrogen
