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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 :
विकल्प
milk white
grey
silvery
yellow
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उत्तर
milk white
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संबंधित प्रश्न
What is nitrogen-fixation?
What happens when Carbon burns in oxygen ? Also give the balanced chemical equation for the reaction.
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List out the uses of carbon dioxide.
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How do astronauts breathe when they go beyond the earth’s atmosphere?
______ present in the air is needed for respiration.
______ is the main component of air.
During respiration, carbon-di-oxide is exhaled out of the body through the ______.
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?
